《周易參同契(一)》

This passage from Zhouyi Cantongqi primarily explains the principles of Yin-Yang transformation and alchemical practice. Qian (Heaven) and Kun (Earth) serve as the gateway to change in the Yijing (Book of Changes), with all transformations originating from the interaction of Yin and Yang. Qian represents the dynamic force of Yang, while Kun embodies the receptive quality of Yin—their union gives rise to all phenomena. Metal symbolizes Qian’s unyielding strength, and Water embodies Kun’s fluid adaptability. The fusion of Metal and Water condenses into the elixir, a process termed "change" (bianyi), while the incorruptible nature of Metal reflects the "unchanging" (buyi) principle.

Among the Eight Trigrams (Bagua), Qian and Kun are called the "father and mother of all hexagrams": Qian, resembling Heaven, is the father; Kun, resembling Earth, is the mother, with the remaining six trigrams as their offspring. For instance, Zhen (Thunder) is the eldest son, Xun (Wind) the eldest daughter, Kan (Water) the middle son, and Li (Fire) the middle daughter.

Kan (Water) and Li (Fire) function like the hub (gu) and spokes (zhou) of a wheel: Water, representing stillness, is the central axis, while Fire, symbolizing movement, forms the outer rim. Water naturally flows downward yet retains inner firmness (the nature of Kan), whereas Fire appears radiant outwardly while harboring Yin softness within (the nature of Li). In the alchemical furnace, the Qi of Water and Fire intermingles—Water contained within the vessel, Fire enveloping it externally—their energies circulating in harmony to refine the elixir.

The text concludes with the "four gendered trigrams" (pinmu sigua), likened to bellows (tuoyue) that drive the alternating rhythms of Yin and Yang Qi. Qian and Kan belong to Yang, while Kun and Li pertain to Yin. Metal and Water symbolize these polarities, their dynamic interplay completing the alchemical transformation. The bellows metaphor illustrates the reciprocating motion of Yin and Yang Qi during refinement, akin to the inhalation and exhalation of breath, propelling the formation of the elixir.

(Note: "Alchemy" here refers to Neidan (internal alchemy), the Daoist practice of harmonizing Yin and Yang Qi within the body to cultivate longevity, as opposed to Waidan (external alchemy), which involves compounding physical elixirs. Symbols like Metal and Water often represent transformations of Jing (essence) and Qi in the cultivation process.)

This scripture employs the metaphor of charioteering to illustrate the principles of Daoist cultivation: The Dao is like a charioteer holding the reins, proceeding in accordance with established rules and measures. The ruler within the chariot symbolizes "metal" (referring to the innate primordial Qi within the human body), while the horses pulling the chariot represent "water" (symbolizing kidney essence). Though the horses may be docile, they require the ruler's guidance; though the ruler sits in the chariot, he depends on the horses to move forward. The metal nature, being supremely firm, maintains internal dominance, while the water nature, being supremely yielding, circulates ceaselessly. When water (essence) tends to dissipate, metal (Qi) can restrain it—this embodies the principle of "guarding the inner palace to control the exterior."

The thirty days of a month divide equally between yin and yang: daylight belongs to yang's firmness, while night belongs to yin's softness. The moments of yin-yang alternation precisely mark the opportunities for metal Qi and water essence to intermingle. This resembles the celestial patterns of sun and moon: the sun as sovereign actively emits light, while the moon as minister reflects its radiance. Water essence (yin) requires metal Qi (yang) for harmonious regulation before it can function effectively, much like the principle of yin-yang complementarity in the sixty-four hexagrams of the Yijing (Book of Changes).

Internal Qi (water and fire) and external form (metal and water) undergo mutual transformation: formless Qi changes first, followed by the formation of tangible substance. "Shuo dan zun zhi shi" refers to the dawn of the new moon's first day, when yin (water) actively seeks yang (metal), and weakness must rely on strength to achieve completion. This mirrors the symbolism of the Zhun hexagram in the Yijing: though the initial interaction of yin-yang is arduous, taking action amidst adversity ultimately leads to smooth progress and righteous preservation. When metal Qi resonates with water essence, it resembles water circulating within the alchemical cauldron, ultimately refining into the true treasure (Golden Elixir). Here, "zhi shi" borrows from ancient duty rotation systems as a metaphor, similar to the eight gates' rotational shifts described in the Dunjia scriptures, representing the scheduled convergence of yin and yang Qi during specific celestial hours.

This passage explains the application principles of the Zhun and Meng hexagrams from the Zhouyi (Book of Changes), along with the interaction of Yin-Yang and the Five Phases (Metal-Water) within temporal cycles.

The Zhun hexagram represents the initial convergence of Yin and Yang, akin to dawn's first light, while the Meng hexagram symbolizes the naive state of newly born things, like a child needing enlightenment. Here Yin (Water) actively seeks Yang (Metal) for guidance, just as moonlight requires sunlight's illumination. The "auspicious enveloping naivety" in the second yang line illustrates the principle of Yin-Yang union, where Metal (firmness) blends with Water (softness) like marital union between genders.

Practitioners should employ these hexagrams according to diurnal rhythms: using Zhun (symbolizing Yang's initial movement) by day and Meng (representing Yin seeking Yang) by night. This cyclical pattern mirrors lunar phases from new moon to dark moon, recurring endlessly. The same principle governs the twelve double-hours and twenty-four solar terms - though the sun (Metal) moves one degree daily while the moon (Water) moves thirteen degrees, their combined rhythms regulate all growth.

Annually, the six months from spring to summer (midnight to mid-morning hours) show Yang dominating while Yin follows; autumn through winter's six months (noon to midnight hours) reverse this dynamic. Cultivation practice must adjust its "civil and martial firing times" (the rhythmic intensity of practice) according to these natural cycles, observing solar and lunar movements to identify optimal timing.

The following interpretation of the Zhouyi Cantongqi (Kinship of the Three) regarding Yin-Yang and the Five Phases (Wuxing) can be understood this way:

During the twelve months of the year, the periods of Wu, Wei, and Shen (corresponding to the fifth to seventh lunar months) mark the beginning of autumn, while You, Xu, and Hai (eighth to tenth lunar months) represent winter. These six months belong to the season of pure Yin dominance, yet Yang energy still operates subtly in the background. Just as water, when condensing, absorbs Metal Qi (Jin Qi), and when Metal Qi dissipates, it merges back into water.

The Eight Trigrams (Bagua), composed of three sets of Yin and Yang lines, are divided into inner and outer sections: the lower three lines (inner trigram) represent Yang, while the upper three lines (outer trigram) represent Yin. The original trigrams drawn by Fuxi consisted of only three lines, symbolizing the Three Powers (San Cai)—Heaven, Earth, and Humanity. Later, to more fully represent the myriad phenomena, three additional lines were added to form the hexagrams. The spring and summer seasons correspond to the Yang lines of the inner trigram (Qian’s initial nine, second nine, and third nine), while autumn and winter correspond to the Yin lines of the outer trigram (Kun’s initial six, second six, and third six). When Yang energy is strong, water (Yin) actively attracts Metal (Yang); when Yin energy is strong, Metal (Yang) in turn draws in water (Yin). The state of Metal within and water outside mirrors the intermediate position where Yin and Yang intertwine in the hexagrams.

The changing seasons also reflect the rewards and punishments of the Dao of Heaven: the flourishing of life in spring resembles Heaven’s bounty, while the withering of plants in autumn resembles Heaven’s retribution. When Fire Qi (Yang) circulates, Metal and water blend—this is the scene of spring; when Water Qi (Yin) circulates, Metal and water solidify—this is the characteristic of autumn.

The alternation of day and night also follows the patterns of cold and heat: gentle fire (civil fire, Wen Huo) is used in cold times, while fierce fire (martial fire, Wu Huo) is employed in hot times, in accordance with the shifts of the seasons. The transformations of Yin and Yang in the hexagram lines embody the qualities of benevolence (Yang, expansion) and righteousness (Yin, contraction): when Yang energy unfolds, it manifests as joy; when Yin energy withdraws, it manifests as anger. Just as Metal becomes active when encountering water vapor (joy), water evaporates when encountering Fire Qi (anger). What is called "righteousness" is the restraint that prevents Metal and water from dispersing excessively.

Only by aligning with the turning of the seasons and following the cycles of mutual generation and restraint among the Five Phases (Wood, Fire, Earth, Metal, Water) can the harmony of Metal and water be maintained. Once Heaven and Earth establish their positions above and below, the transformations of Yin and Yang unfold within them—once the order of Heaven’s loftiness and Earth’s humility is set, all things are born through the interaction of Yin and Yang. This is precisely what the Yijing (Book of Changes) means by "Heaven is high and Earth is low; thus Qian and Kun are fixed." Heaven and Earth represent the two poles of Yin and Yang, and only through their interplay can the myriad beings be nurtured.

This passage explains the principles of Yin-Yang transformation. Metal and Water represent Heaven and Earth, while Water and Fire represent transformation. Heaven and Earth are Qian (Heaven) and Kun (Earth) in concrete form, whereas Qian and Kun themselves are formless Qi. All things first manifest as energetic configurations before taking physical shape, just as Metal and Water materialize through the interaction of Water and Fire Qi.

"Establishing positions" refers to arranging the complementary alignment of Yin and Yang. When Yin Qi receives Yang Qi, it is called coordination—this signifies the mutual integration of Metal and Water. "Kan (Water) and Li (Fire)" are the two operational modes of Qian and Kun. These modes have no fixed trigram positions but circulate fluidly through six empty spaces. Qian and Kun represent the functions of Heaven and Earth, while Kan and Li embody their operational manifestations. The six empty spaces (six voids) refer to the inner dimensions of a vessel rather than six fixed locations.

Kan and Li are the Qi of Water and Fire, while Qian and Kun are the forms of Metal and Water. Forms are substantial and fixed, whereas Qi is formless yet operates subtly, flowing and transforming within the six voids. In the dual functions of Qian and Kun, Metal and Water operate dynamically without fixed trigram positions. The Xi Ci states: "Change never ceases, circulating through the six voids, ascending and descending without constancy, hardness and softness exchanging"—this describes the mutual transformation between Metal-Water and Water-Fire.

The movement of Water and Fire follows no fixed pattern, and their positions are never constant. Their vapors intermingle, and the forms of Metal and Water continuously shift, naturally fluctuating without regularity. When Water encounters Fire, it rises as vapor; when Metal resides in Water, it sinks and hides. Through this alternating transformation, they eventually condense into form within the vessel.

Heaven and Earth encompass all things, using Yin and Yang as their guiding principles (Yang as the guiding force, Yin as the organizing thread). Here, "guiding principles" mean Yin above and Yang below. What contains all things is Heaven and Earth; what serves as the Dao's framework is Yin-Yang. What contains Metal and Water is the alchemical cauldron; what governs the vessel's operation is Water and Fire.

Formless Qi controls tangible substances, and the vessel's function lies in its emptiness. The physical forms of Metal and Water are tangible, while the Qi of Water and Fire is intangible. When the Qi of Water and Fire intermingles, the forms of Metal and Water naturally harmonize, balancing these two energies within the void.

Thus, one must comprehend the waxing and waning rhythms to master the transformations of Kan and Li. The Zhouyi Zhengyi states: "Only those who remain focused in observing waxing and waning will not fail"—this refers to regulating Water and Fire. Adjusting their cycles in accordance with seasonal rhythms allows Metal and Water to complement each other; disregarding these rhythms causes Water and Fire to clash. What are called Water and Fire are Kan and Li—"disappearance" does not mean true vanishing but rather the cyclical concealment and reappearance of their Qi during transformation.

This passage elucidates the principle of Yin-Yang cyclical transformation: When water (Yin) is exhausted, the sun (Yang) sets and the moon (Yin) rises; when the moon sets, the sun rises again—this is the cosmic rhythm where Yin and Yang alternately govern heaven and earth.

The classic Zhouyi Cantongqi (The Seal of the Unity of the Three) is not mere fabrication, but builds upon the wisdom of three sages—Fu Xi, King Wen, and Confucius—to profoundly expound the mysteries of Yin-Yang transformation. By observing the movements of the sun and moon, it verifies the principles of Golden Elixir (Jindan) cultivation (Daoist Neidan practice). Just as the sun represents metal and the moon represents water, mastering the timing of metal-water fusion requires aligning with the sun-moon alternation. This unpredictable interplay of Yin and Yang constitutes the most wondrous force in the cosmos.

The text uses the character "易" (Yi/Change) as a metaphor: its upper component "日" (sun) and lower "月" (moon) combine to form "易," much like how the dragon symbolizes heaven (Qian) and the horse symbolizes earth (Kun). Within the Water (Kan) trigram, the celestial stem Wu represents lunar essence, while in the Fire (Li) trigram, Ji embodies solar radiance. Fiery Qi ascends to form the sun, while watery Qi condenses into the moon—mirroring how water-fire vapors interact with metal-water substances during alchemical processes.

Throughout the year, the sun and moon conjoin monthly, completing twelve cycles to form a full temporal round. Earth (Wu-Ji), though formless, permeates all four seasons like the furnace walls enclosing the entire alchemical operation. The Azure Dragon of the East governs Wood, the Vermilion Bird of the South rules Fire, the White Tiger of the West commands Metal, and the Black Tortoise of the North presides over Water—with central Earth (Wu-Ji) anchoring them. During elixir refinement, these four directional animals are depicted on the furnace walls, using Earth's central nature to prevent the leakage of metal-water essences, for only earth can restrain water's fluidity.

"Change" (Yi) derives its patterns from heaven and earth, whose most vivid manifestations are the sun and moon. The Fire (Li) trigram symbolizes the sun, while the Water (Kan) trigram represents the moon—both being quintessential expressions of fire-water essences. The celestial dance of sun and moon directly reveals the Dao's operation, where daylight and nighttime alternate in dynamic harmony, paralleling the fusion of Yin-Yang energies in Golden Elixir cultivation.

During the day, the vigorous energy of the sun dominates, while at night the gentle power of the moon takes effect. The application of metal (representing solidity) and water (representing fluidity)—these two material energies—cannot be separated from the fundamental interaction of water and fire (Yin-Yang), just as the sun and moon are the source of life for all things. Without the blending of water and fire (Yin-Yang), metal and water cannot form a complete cycle.

The Book of Changes states, "The unfathomable transformations of Yin and Yang constitute the divine," and "the alternation of one Yin and one Yang is called the Dao." One who thoroughly comprehends the patterns of Yin-Yang transformation can grasp the root of all things' evolution. Metal and water symbolize the origin of change, while water and fire embody the laws of Yin-Yang movement. As Yin and Yang wax and wane, their mutual stimulation gives rise to precious phenomena. Confucius said, "Only those who understand the way of transformation can comprehend the workings of the divine."

Like the spokes of a wheel gathering and turning, the Qi of water and fire converges and steams within the alchemical cauldron (a vessel for cultivation). When water Qi enters, fire Qi contracts; when fire Qi enters, water Qi expands—this contraction and expansion perpetually cycle within the vessel.

The Book of Changes contains sixty-four hexagrams, each with six lines, totaling three hundred and eighty-four lines (Yao, the basic components of hexagram imagery). This precisely corresponds to the ancient weight measurement where one jin of gold was divided into three hundred and eighty-four zhu. When applying the metal-water and water-fire principles in cultivation, their transformational states either align with the hexagram as a whole or correspond to specific line statements. Though the line manifestations vary endlessly, none exceed the framework of the sixty-four hexagrams.

At the time of the new moon (Shuo Dan), the energy of the Zhen hexagram (symbolizing thunderous movement) begins to manifest. At this moment, earthly Qi ascends, and Zhen assumes the dominant position. The Book of Changes describes Zhen as "movement generating vigor," where Zhen represents action and "Li" signifies danger. Here Yin resides above Yang, with Yang Qi rising while the yielding Yin suppresses the vigorous Yang, creating a precarious state. Like water floating atop metal (Yin pressing Yang), encountering fire would cause turbulence. The ancients used twelve pitch pipes (instruments for observing Qi) buried indoors, filled with reed ashes and covered with fine gauze. When earthly Qi rose, it would stir the reed ashes, allowing observation of Yin-Yang transformations.

At this moment, the essences of heaven and earth intermingle. The Book of Changes states, "When the primal Qi of heaven and earth blend, all things are refined; when the vital essences of male and female unite, all things transform." Here, male and female metaphorically represent heaven and earth, while essence and Qi symbolize Yin and Yang. The white essence of the male (Yang) and the red blood energy of the female (Yin) attract each other like the sun and moon resonating. When the two Qi of Yin and Yang meet at their appointed hours (Zi and Wu), they naturally combine like husband and wife in union. The energy generated from this union circulates endlessly, akin to an axle turning a wheel.

This scripture elucidates the fundamental principle of Yin-Yang interaction and the Great Dao of the Golden Elixir (Jindan). It employs the metaphor of conjugal union to illustrate the blending of celestial and earthly Qi: when the golden essence (representing Yang) meets the watery essence (representing Yin), their interaction resembles fire and water in dynamic equilibrium, crystallizing during vibrational fusion to form the "True Treasure" (embryonic form of the Golden Elixir). This law of Yin-Yang resonance manifests not only in lunar phases but also in the daily alternation of day and night as cyclical expressions of Qi transformation.

The sun and moon move like shuttles on a cosmic loom, weaving celestial and terrestrial energies through their motions. Just as gold requires tempering by water and water needs evaporation by fire, Yin and Yang Qi perpetually transform each other. The outward-expanding masculine Yang (Xiongyang) and the inward-nurturing feminine Yin (Ciyin) merge like the azure heavens embracing the yellow earth. These complementary dynamics, akin to seasonal transitions fostering life, ultimately generate the "Yellow Sprout" (symbolizing the nascent elixir).

The primordial chaos (pre-cosmic undifferentiated state), though seemingly quiescent, constitutes the source of all creation. Like the tranquil moment of gold-water fusion, it forms the foundation for refining the Reverted Elixir. Practitioners must emulate jade artisans, skillfully regulating the fire and water (symbolizing internal Yin-Yang Qi) to condense Shen (spirit) into form, constructing the elixir's core framework.

All life adheres to this cosmic law—whether humanity or microscopic organisms, all abide by the Dao's Yin-Yang governance. Confucius (Zhongni) unveiled chaos' mysteries through the Book of Changes (Yijing), enabling humanity to perceive the operation of Qian (heaven) and Kun (earth). Without canonical texts like the Triple Unity (Cantongqi), how could the world comprehend the Golden Elixir's truth? Tracing back to the primordial era of the Primal Sovereign, even poetic classics like the Guanju encoded the beginnings of Yin-Yang harmony.

In the era of the Heavenly Sovereign (one of the legendary Three Sovereigns of antiquity), men and women naturally united without deliberate pursuit. However, from the time of the Yellow Emperor onward, union required active courtship, as depicted in the "Guanju" poem from the Classic of Poetry (Shijing): "The ospreys cry harmoniously on the river isle; the virtuous and graceful maiden is the fitting match for the noble man." Here, "metal" symbolizes the masculine, while "water" represents the feminine—the metal initiates movement, and the water responds, mirroring the dynamic of male pursuit of female.

When men and women reach marriageable age, the fusion of their essence (Jing) and vital energy (Qi) intertwines like vines, gradually nurturing new life. This process resembles building a nine-tiered tower from accumulated earth or the sprouting of all things at the year's beginning, growing luxuriantly over time—a transformation beyond simple calculation. The resonance between metal and water unfolds with similar naturalness.

Sages like Fuxi did not create arbitrarily; they observed the patterns revealed by celestial phenomena (the "celestial signs" referring to the movements of the sun, moon, and stars). When Fuxi drew the Eight Trigrams (Bagua), he looked upward to celestial patterns, downward to terrestrial forms, and in between studied the characteristics of all beings and the markings of birds and beasts. Drawing from the near (human anatomy) and the far (the shapes of myriad things), he devised the trigrams to connect with the virtue (De) of the divine and categorize the dispositions of creation. The alignment of the Seven Luminaries (sun, moon, and five planets) with the Five Phases (Wuxing) marks the origin of alchemical practice.

The movements of celestial bodies follow rhythms of advance and retreat, contraction and expansion. The Book of Changes (Yijing) states that transformation manifests as these movements: retreat as contraction, growth as expansion, with their mutual resonance generating benefit and harm. The revolutions of the sun, moon, and planets, the alternation of day and night's Yin and Yang, the interplay of firm and yielding that gives birth to all things—these are mirrored in the alchemical process where metal and water resonate to form the true treasure (the refined essence of internal alchemy).

Thus, the Book of Changes encapsulates the Dao of heaven. The hexagram Fu (Return, 地雷复) symbolizes the sprouting of life. "Return" signifies the reversion of Yin and Yang to their source, with heaven and earth taking non-action (Wuwei) as their innate heart. The Changes describes Fu as "smooth progress, unimpeded in coming and going," akin to the winter solstice when Yin and Yang energies stir anew beneath the earth, initiating the gestation of all things. Though thunder and wind bring myriad transformations, all ultimately return to the silent, empty origin—the heart of heaven and earth. Fu appears quiescent yet harbors vitality within: in the eleventh month, the single Yang line (the bottom line of Fu) stirs beneath the Yellow Springs, heralding the gestation and growth of all creation.

This scripture elucidates the principles of Yin-Yang transformation in alchemical practice, using natural phenomena like lunar phases and the mutual generation of metal and water as metaphors.

In the alchemical process, metal (Jin) occupies the lower Yang position while water (Shui) resides in the upper Yin position. The transformation of Yin energy into Yang resembles water gradually freezing into ice. When both metal and water achieve stillness, the state of Wuwei (non-action) is attained—the fundamental principle of the Dao. Only through refining the returning elixir can one align with the Dao, requiring a mental state beyond thought yet maintaining purposeful engagement beneath apparent inaction.

The Zhen trigram (one of the Bagua, representing thunder) serves as the eldest son of the Qian trigram (representing heaven), positioned in the pure Yang eastern quadrant. Like an heir continuing his father's legacy, Zhen inherits Qian's functions to nourish all things. When Zhen's bottom Yang line first stirs, it signals the sprouting of creation. Metal (Jin) embodies the eldest son while lead (essence of metals) represents the father; water serves as the mother, and metal transforms anew through water's nourishment—this constitutes the meaning of "following the mother."

Observing Yin-Yang waxing and waning must accord with musical temperament (Zhonglü), while ascending-descending movements follow the Big Dipper's rotation (Dou Shu). Monitoring metal-water transformations across seasonal nodes resembles using celestial measurements with bells and terrestrial energy with pitch pipes. Fire regulation in alchemy requires similar observation. Metal's rising and rotating under water-fire influences mirrors the Dipper's movement, providing tangible verification of cauldron transformations.

At lunar day three, the faint crescent (Shuang) appears in the western Geng position, symbolizing the furnace's fire energy beginning to circulate after three days. Water, corresponding to the moon's Yin nature, reveals its movements through lunar observation. By day eight, the waxing moon reaches its first quarter (Dui trigram's Ding position), resembling a drawn bowstring—here metal initiates movement. Metal moves slowly like a sovereign (taking eight days), while water acts swiftly like a minister.

On the third day of the lunar cycle, when the energies of Metal (representing Yang) and Water (representing Yin) begin their cyclical movement, one can observe the patterns of celestial timing.

By the fifteenth day, the moon reaches its fullest state in the Jia position (the first of the Heavenly Stems) in the eastern sky. At this point, the Metal and Water energies merge in the Jia position, jointly forming the complete lunar phase. The ancients used two legendary moon creatures—the toad and the jade rabbit—to symbolize the convergence of solar and lunar Yin-Yang energies. On this day, their silhouettes appear together on the moon's surface, while on other days they gradually diminish.

The "White Tiger Treatise" explains that the rabbit (jade rabbit) earned its name because it could "emit" the moon's radiance. When the toad appears, the moon is full; when it disappears, the moon wanes. The ancients used this phenomenon to observe the cyclical changes of Metal and Water energies.

After the fifteenth day, the moon begins to wane. This resembles how a minister (the moon) must return merit to the sovereign (the sun). On the sixteenth day, the moon receives anew the solar mandate (energetic imprint) to continue its cycle. At this stage, the moon moves from the Xun position (southeast) to the Xin position (northwest), where Metal energy again receives Water's imprint, much like how the sun influences lunar changes.

By the twenty-third day during the waning crescent, the moon travels from the Gen position (northeast) to the Bing position (south), displaying the nascent image of ending-yet-beginning, marking the transition into Water energy's dominant phase.

When the thirtieth day concludes the cycle, the moon rises in the Yi position and sets in the Kun position (southwest). Kun represents pure Yin, hence the phrase "losing its companion." Water's flow from northeast to southwest also symbolizes the alternating rhythm of Yin and Yang.

At each month's end, Yin energy ritually yields dominance to Yang energy. When the new cycle begins, Yang energy (symbolized by the dragon) reappears, and Metal energy resumes its sequence after Water, restarting the eternal rhythm of celestial Dao.

This passage explains the principles of Yin-Yang transformation in Daoist alchemy. The dragon symbolizes the Qian trigram (representing Heaven and Yang), while the horse symbolizes the Kun trigram (representing Earth and Yin), reflecting their natural correspondence. The pairing of Water (壬癸) with Wood (甲乙) illustrates how the Qian and Kun trigrams encompass the beginning and end of all things.

The term "binding and uniting" refers to the interaction of Yin and Yang Qi (vital energy) within a lunar month, each occupying half the cycle and combining to generate all phenomena. Yin and Yang Qi are the energies of Water and Fire, and their dynamic interplay gives rise to the form of Metal-Water (a key alchemical product). The Yijing (Book of Changes) states that Qian governs creation while Kun governs completion, embodying the cyclical nature of beginnings and endings. Among the numbers seven, eight, nine, and six, seven and nine belong to Yang, while six and eight belong to Yin—their pairing forms a monthly cycle. The transformation of Metal-Water (alchemical substances) follows this same principle of Water and Fire mutually engendering one another.

The sum of these four numbers (7+8+9+6) equals thirty, symbolizing the days of a lunar month. The Dao of Yin-Yang transformation follows natural law: when Yin Qi is dominant, one withdraws; when Yang Qi prevails, one expands. The movement of the Eight Trigrams (Qian, Kun, Kan, Li, Zhen, Xun, Gen, Dui) maintains the balanced middle way of Yin-Yang, just as alchemy employs the energies of Water and Fire without damaging the vessel.

Primordial Jing (essence, the original Qi) is difficult to observe directly and must be verified through calculation. Like the Taiji (Supreme Ultimate) generating the Two Modes (Yin-Yang), which in turn give rise to the sun and moon, the seasons, the Five Phases (Wood, Fire, Earth, Metal, Water), the twelve months, and the twenty-four solar terms. Fifteen days form one solar term, two terms make a month, and four seasons complete a year—this cycle repeats endlessly. Though formless, primordial Qi can be deduced by observing the sun and moon to track heat and cold, and by interpreting trigrams to discern fortune and misfortune. Similarly, the transformation of Metal-Water in the alchemical cauldron is inferred through changes in temperature and trigram correspondences.

One should regularly observe celestial phenomena (the movements of the sun, moon, five planets, and twenty-eight lunar mansions) as a guide. When the sun and moon conjoin (a specific celestial alignment), the Metal-Water in the cauldron will coagulate accordingly, revealing signs of the elixir’s formation. Establishing a gnomon (an ancient astronomical instrument) as a standard allows one to determine auspicious and inauspicious moments for alchemy through celestial observation. By following the rhythms of the sun and moon, one can grasp the critical moment when Metal-Water solidifies.

The Zhouyi Cantong Qi (Token for the Agreement of the Three According to the Book of Changes) emphasizes that alchemical practice must accord with celestial timing and the patterns of Yin-Yang transformation. The text indicates that auspicious and inauspicious signs reflect gain and loss, while regret and remorse forewarn of calamity. Only by carefully observing the waxing and waning of Yin and Yang can one avoid misfortune and successfully refine the Reverted Elixir (Neidan, the internal alchemy of Daoist cultivation).

After the winter solstice, Yang Qi begins to stir, sprouting beneath the earth at the Yellow Springs—this is the most opportune moment to ignite the alchemical fire. One must observe celestial patterns above (such as the mystical diagrams of the Hetu and Luoshu), examine terrestrial waterways below, and contemplate human affairs in between, thereby synthesizing the Dao of Heaven, Earth, and Humanity—the Three Powers. Celestial patterns correspond to fire phases, terrestrial features to water currents, and human affairs to timing; their harmonious integration forms the complete method of cultivation.

Movement and stillness must align with hexagram principles: Zhen (Thunder) represents dynamic action, while Fu (Return) symbolizes quiescence. The fiery nature, which ascends, should follow the hexagrams' active impulse, while the watery nature, which descends, must remain still and true to its essence. The judgment of Fu hexagram states, "Return reveals the heart of Heaven and Earth," referring to the natural state of Wuwei (non-action) in the cosmos.

Just as the operations of Qian (Heaven) and Kun (Earth) give birth to all things, the alchemical elements of water and fire must follow this same pattern to find their proper places. During the alchemical process, one must seal the vessel tightly, allowing the Golden Water (a term for the interaction of Yin and Yang Qi) to merge spontaneously, thereby producing the True Elixir.

Finally, the text employs the Big Dipper as a metaphor: like an imperial chariot governing the four directions, its seven stars regulate the Five Phases of Heaven and Earth. The first four stars form the "Ladle" (Kui), while the last three constitute the "Handle" (Biao), with the auxiliary star Alcor (Fu) beside Mizar (Kaiyang), collectively harmonizing Yin-Yang and the four seasons. This mirrors how alchemy must grasp the pivotal axis of Yin-Yang and follow natural rhythms.

This scripture primarily discusses the correspondence between celestial phenomena and the cyclical patterns of the Five Phases (Wood, Fire, Earth, Metal, Water), as well as how to determine optimal cultivation periods through astronomical observation.

The text explains that aligning with the movement of the Northern Dipper (Ursa Major) enables one to master the generative and controlling sequences of the Five Phases. Once this systematic understanding is established, one need not worry about imbalances among Metal, Water, Fire and other elements. Just as internal changes in the trigrams (Bagua) manifest externally as auspicious or inauspicious signs, the transformations of Metal and Water (crucial elements in alchemical processes) during cultivation must also be interpreted through trigram correspondences. An auspicious sign occurs when Metal retains Water, while an inauspicious one manifests as Water dissipation. The key lies in precisely timing the balance between Fire and Water - even slight deviations may lead to failure.

The text further elucidates the movement patterns of the Five Planets (Mercury, Mars, Venus, Jupiter, Saturn): when their orbits remain orderly, Yin and Yang remain harmonized; when their movements become chaotic, Yin-Yang imbalance occurs, resulting in disasters in corresponding regions. This mirrors how Metal-Water interactions flow smoothly during Fire-Water equilibrium but dissipate during their imbalance - all crucial observational references in celestial divination.

Positional deviations among the Twenty-Eight Lunar Mansions (ancient Chinese constellations) foretell abnormalities in Metal, Water and Fire interactions. Special emphasis is placed on the roles of the Wenchang Star (governing literary fortune) and Auxiliary Stars (symbolizing ministerial power): their brightness indicates seasonal regularity and Five Phases harmony, while Yin-Yang disharmony prompts Wenchang's celestial accountability. Using Earth's capacity to regulate the other phases as metaphor, the text underscores the importance of adjustment.

Finally, the scripture describes how celestial bodies maintain cosmic order like terrestrial officials - for instance, the Historiographer Star records transgressions while the Three Dukes Stars fulfill their respective duties. These astronomical changes serve as vital indicators for Golden Elixir (Jindan) alchemical practices.

This scripture primarily discusses the correspondence between celestial phenomena and human governance, as well as the operational principles of Yin-Yang and the Five Phases (Wuxing).

The stars in the heavens mirror the bureaucratic hierarchy on earth: three stars oversee the propagation of virtue and transformation (Xingzhu Xuande Hua Jiuqing Sanxing), five stars govern administrative affairs (Zhuli Wanshi Shangshu Wuxing), two stars manage counsel and deliberation (Zhuna Yan Zimou Dali Erxing), and there are also stars specifically in charge of judicial punishment (Zhuxingyu Shi). The structure of human officialdom in China was modeled after this celestial arrangement, corresponding to the deities of the five directions and the cyclical patterns of the essences of water and fire.

The movements of the sun and moon follow distinct rhythms: the sun's path aligns with the essences of the Five Phases, while the moon's motion adheres to the six musical pitches (liulü). According to the Yisi Zhan, the sun and moon meet with the five planets at the noon position once each month. The moon receives the seasonal Qi (jieqi) and harmonizes with the sun, while the five planets—Metal (Jin), Wood (Mu), Water (Shui), Fire (Huo), and Earth (Tu)—each fulfill their respective functions. Multiplying five by six yields thirty degrees, completing one cycle before beginning anew.

The mechanics of their motion are as follows: the sun travels one degree per day, while the moon moves thirteen degrees daily, eventually converging with the sun. The beginning of the month belongs to Yang, the end to Yin—within a single month, Yin and Yang alternate in an endless cycle, much like the mutual generation and restraint between Metal and Water.

The Dao of Yin-Yang pervades all: commencement is Yang, conclusion is Yin, and this transformation constitutes what is called the "way of civil and martial governance" (wenwu zhidao). If civil and martial principles are applied appropriately, the Qi of Metal and Water can be preserved; if they are misused, Metal and Water will dissipate. The key to survival or demise lies in the balance of Water and Fire.

The text also employs the metaphor of ruler and minister: the ruler symbolizes Metal, and if he becomes arrogant and excessive (kangman), deviating from the proper Dao, it is akin to Metal's energy growing too strong and losing harmony. The minister symbolizes Water, and if his Yang energy becomes excessive (de gangyang zhiqi), he will become unruly and undisciplined. The ideal relationship between ruler and minister should resemble the mutual nourishment of Metal and Water, relying on the precise coordination of the timing of Water and Fire.

The phases of the moon also carry profound meaning: the first quarter on the eighth day, the last quarter on the twenty-third, and the full moon (wang) on the fifteenth. If the waxing and waning of the moon do not align with the proper measures, it becomes difficult to grasp the timing of Metal and Water's movements; excess leads to calamity (jiu).

Finally, the celestial judicial system is mentioned: among the ten stars of the Taiwei Enclosure, the wings (Yi) and chariot (Zhen) constellations represent the imperial court. The southernmost star is called the "Gate of Dignity" (Duanmen), while to its east and west stand the Left Law Enforcer (symbolizing the Minister of Justice) and the Right Law Enforcer (symbolizing the Censor), responsible for scrutinizing faults and rectifying errors.

This passage primarily discusses the integration of ancient astrology with alchemical practices, using celestial phenomena as metaphors for the alchemical process. It mentions the North Star (Polaris) as the celestial center—while other stars move and change, it remains unmoving, just as the gold (symbolizing the elixir) remains stable within the alchemical vessel.

The text compares gold to a ruler and fire to an enforcer. If the gold (elixir) cannot control water (alchemical materials), fire must be used to regulate it. The gold and water within the vessel must maintain a state of quiet emptiness, much like the North Star nurturing light and Qi (vital energy). The vessel's opening must be tightly sealed to prevent the medicinal substances from leaking.

During the alchemical process, the three luminaries—sun, moon, and stars (symbolizing Yin-Yang energies)—submerge within the vessel to nurture the "child pearl" (the nascent elixir). Though these transformations are invisible to the eye, they are achieved through the regulation of water and fire. Ultimately, the elixir becomes like fine jade—internally refined and harmonious, externally radiant like polished skin.

Using celestial imagery as allegory, this passage emphasizes maintaining balance and stability within the vessel, allowing the elixir to form naturally through the interplay of water and fire. The phrase "yellow center connecting principle" (黄中通理) originates from the Yijing (Book of Changes), describing the elixir as embodying the cultivated virtues of a noble person—harmonizing inner essence with outer refinement.

This scripture elucidates the principle of mutual generation between metal and water in alchemical practice. When metal (representing yang energy) enters water (representing yin energy), their fusion creates a naturally moistening state that permeates the entire body. Just as a tree has its central trunk (yang) and branching limbs (yin), though metal governs water, its initial power remains weak. Like the nascent yang energy of the first lunar month, it must progress gradually through complete cycles to achieve the true treasure (Golden Elixir).

The number "one" symbolizes water, which must be contained within a vessel to prevent dissipation—a principle ordinary people fail to comprehend, thus vainly squandering resources. Superior De (water's virtue) manifests as spontaneous Wuwei (non-action), while inferior De (fire's virtue) requires continuous operation. Water embodies the silent, non-active substance, whereas fire displays active function. In the state of Wuwei, one naturally attains purity; during active phases, persistent effort is essential.

The upper closure is termed "presence" (water's tangible form), while the lower closure is called "absence" (fire's intangible nature). Fire operates through Qi (vital energy) to manifest emptiness, while water reveals function through physical form. The empty fire-Qi ascends to nourish, while the substantial Shen-De (water's spiritual virtue) resides above. When these two energies—water and fire—harmonize like coordinated apertures in the alchemical furnace, the Golden Elixir is forged.

Understanding that golden radiance (white) must guard the aqueous foundation (black) allows divine illumination to emerge spontaneously. The metallic essence (yellow sprout, the initial sign of the Golden Elixir) prevents the dissipation of water-Qi. What we call "Shen" (spirit) refers to the mysterious force behind all transformations. When matter reaches ultimate refinement, true nature manifests miraculously, as if deities descend. Water serves as the pivotal hinge of the Dao, numerically designated as "one" within the Five Phases, possessing infinite transformative potential.

The primordial state of Yin and Yang contains the mysterious "yellow sprout." Here "mysterious" refers to water, while "yellow sprout" denotes the essence of metal. The moment when metal and water first intermingle marks the beginning stage of Yin-Yang formation.

The Northern River Chariot (referring to a crucial substance in alchemical practice) governs the Five Metals. This River Chariot represents the quintessence of the Five Metals and is another name for lead. Though lead appears black externally, it contains golden radiance within—like a person wearing coarse cloth yet concealing precious jade, appearing outwardly eccentric while harboring treasures internally.

Metal serves as water's mother, with the mother hidden within the fetus; water acts as metal's offspring, with the child dwelling in the mother's womb. Metal generates water and thus is called mother, while water originates from metal and thus is called child. Before separation, they always remain together within the embryonic enclosure.

The true supreme treasure exists between being and non-being—though possessing the qualities of treasure, it hasn't fully taken form. Like in the great abyss (the alchemical vessel), it alternately sinks and rises with the fluctuations of firing temperature. When the four elements (water, fire, metal, wood) interact, each occupies its designated position within the vessel.

During collection it appears white, but transforms to vermilion during refinement. In the refining process, water (white) serves as metal's protective layer until water ultimately merges into metal, their perfect fusion forming the true path. The union of metal and water creates a spherical form about one inch in diameter—a seamless unity.

The alchemical apparatus existed before Heaven and Earth took form, standing majestically tall. Surrounded by wall-like structures, its shape resembles Mount Penglai, the immortal isle. The entire setup remains tightly sealed against external disturbances, with interconnected internal passages as precaution. Here lies the crucial point: maintaining mental tranquility is essential, as excessive contemplation proves harmful. When Shen (spirit) and Qi fill the alchemical chamber, no deliberate guarding is needed. Success comes to those who preserve this state; failure follows its loss. All movement and stillness must harmonize with this natural rhythm.

The phrase "prior to Heaven and Earth" refers to the alchemical apparatus. The cosmic principle of metal generating water must first be simulated within this vessel. Positioned atop the furnace, the apparatus is thus called "exalted." The earthen furnace resembles city walls, with furnace and vessel joined to form a mountain shape—hence compared to Penglai's immortal realm, symbolizing the perfected person cultivating within.

In Neidan (internal alchemy) practice, the structure within the "furnace and cauldron" (referring to the human body) operates like a revolving wheel, with Qi (vital energy) circulating continuously. One must maintain the containment of a sealed tower, ensuring no leakage when energies converge within. The key lies in stability and tightness. Those who comprehend its profundities achieve it effortlessly without deliberate thought, while those who lose sight of fundamental principles gain nothing through anxious striving. The transition between movement and stillness, activity and rest, marks the critical juncture of choice—though cultivation requires the mutual nourishment of water and fire (Yin-Yang harmony), the ultimate accomplishment resides in metal-water mutual generation (lung-kidney interaction). These outcomes depend entirely on the practitioner rather than external forces. Thus, the rhythms of movement and stillness are inherently aligned with the natural patterns of human life.

The "Method of Traversing the Viscera" mentioned here refers to embryonic respiration practice through inner vision observation of the five organs (a health-preserving technique simulating fetal breathing). It also includes stepping the celestial paces (Taoist ritual footwork) in coordination with the Six Jia spirit talismans (charms of the sixty Jiazi divine generals), as well as the cultivation method of swallowing solar and lunar essences.

However, caution must be exercised: misuse of bedroom arts (ancient sexual cultivation techniques) that disrupt primordial Qi (life force) will lead to turbidity and degeneration of the innate primordial cavity (Dantian). Proper breathing methods should expel turbid Qi from the body while absorbing clear Qi from the external environment, maintaining gastrointestinal fullness.

Some practitioners cultivate day and night without cease, resulting in incessant intestinal rumbling, meridian disorder, physical exhaustion, and mental confusion resembling stupor. Others erect altars to sacrifice to ghosts and deities, becoming smug upon dreaming of spectral manifestations, believing this grants longevity—only to meet premature death with decaying corpses exposed. These represent misguided paths: excessive faith in sacrificing to spirits, obsession with Daoyin (stretching exercises), incantation recitation, or arduous meditation are not the true Way.

The Taiqing Jing (Scripture of Great Clarity) states unequivocally: The genuine path to longevity lies neither in sacrificing to ghosts and deities, nor in Daoyin stretching, nor in verbose incantations, nor in strenuous contemplation and forced cultivation.

This passage explains the key to refining the Golden Elixir (Jindan), the highest attainment in Daoist cultivation. While understanding its principles may seem simple, genuine success is extraordinarily difficult—requiring nine cycles of refinement to achieve the pure "Eight-Jewel Elixir." Most alternative methods are misleading distractions; those who grasp true cultivation must vigilantly avoid such heterodox paths.

Though numerous techniques claim efficacy, many deviate from the orthodox teachings transmitted by the Yellow Emperor and Laozi (Huang-Lao) and stray from the natural Dao imparted by the Nine Perfected (Jiuzhen). A discerning practitioner need only contemplate their essence to suddenly awaken to the genuine path.

In brief, "Yellow" symbolizes the central Earth phase, while "Nine" represents pure Yang Qi. Earth stabilizes Yang, preventing its dissipation. Among all methods, the alchemical path elucidated in the Zhouyi Cantongqi (The Kinship of the Three) is the most profound. By truly comprehending the sages' intent and the root principles of cultivation, no Dao remains unattainable, no Virtue (De) unrealized.

Persist in diligent practice day and night without respite. After a year of unwavering focus and three years of continuous refinement, the body becomes light enough to roam heaven and earth. Consuming mere grains of rice (symbolizing elixir ingestion) daily for three years leads to Dao-realization—a state of boundless freedom. At this stage, one becomes impervious to fire and water, manifests or vanishes at will, and dwells in eternal joy.

Upon attaining the Dao, await the summons of the Great Unity (Taiyi), the supreme celestial deity, to ascend to the immortal realms. When merits are fulfilled, one soars to the heavens and receives the celestial register (Tulu). Taiyi oversees the entire alchemical process; success is first reported to the Shangqing realm (one of the Three Pure Ones' domains), and upon approval, ascension is granted.

The Fire Record (Huoji) scripture is utterly authentic, using the Yijing's wisdom to illuminate alchemy. The foundation lies in harmonizing Yin-Yang principles—the human body itself is the source of Yin-Yang, thus cosmic symbols clarify cultivation's core.

The alchemical furnace resembles a crescent moon (Yanyue). The White Tiger, representing Metal (lead), enters first; the Azure Dragon, symbolizing Water (mercury), follows. Metal acts as a pivot controlling Water's transformations. Mercury (Liuzhu) is the condensed essence of solar light, fusing with Metal in the furnace.

The Azure Dragon (Water) of the East and White Tiger (Metal) of the West unite like the merging of human hun (ethereal soul) and po (corporeal soul). The Dragon embodies Water (Yin-spirit as po), the Tiger embodies Metal (Yang-spirit as hun)—their fusion achieves Yin-Yang equilibrium. The upper crescent (Dui trigram) weighs eight liang, the lower crescent (Gen trigram) another eight liang, totaling one jin (ancient sixteen-liang measure). This symbolizes the harmonious interaction of Qian (Heaven) and Kun (Earth), ensuring the path never strays from its true course.

The Zhouyi Cantongqi primarily discusses the principles of Yin-Yang transformation and the mutual generation and restraint of the Five Phases (Wood, Fire, Earth, Metal, Water) in alchemical practice. The text employs numerical symbolism and natural phenomena as metaphors for the alchemical process.

Sixteen liang make one jin (an ancient unit of measurement), a number that subtly aligns with the patterns of Yin-Yang transformation. The 384 zhu (an ancient weight unit) corresponds to the 384 lines of the 64 hexagrams in the Yijing (Book of Changes), indicating that the firing process in alchemy must harmonize with the principles of the Yi.

Just as true gold does not lose its luster when cast into fierce flames, and just as the sun and moon have remained bright since the dawn of creation, genuine gold never diminishes in weight. Here, the eternal nature of the sun, moon, and gold serves as a metaphor for the pure essence of alchemical ingredients.

The text describes the generative relationships among the Five Phases: Metal (representing Yang) and Wood (representing Yin) both originate from lunar phases. On the first day of the lunar month (shuodan), the moon begins to receive sunlight. Just as Water is generated from Metal, when the moon wanes (yuehui), Metal becomes enveloped in Water and temporarily concealed. When Metal regains its nature, the alchemical cauldron manifests its efficacy.

Regarding numerical symbolism: Zi (Water) is one, Wu (Fire) is two, combining to make three; Wu-Ji (Earth) is five, and the sum of these three is eight. This "eight" corresponds to the eight minerals (ba shi) used in alchemy, illustrating that Water, Fire, and Earth are the fundamental elements of the practice. As stated in the Zhongjing, these three ultimately return to Earth.

Breathing serves as a metaphor for the fusion of Water and Fire energies in alchemy: Metal symbolizes the masculine, Water the feminine, and their union resembles the conjugal harmony of husband and wife. Yellow Earth generates Metal, while cinnabar (liuzhu) generates Water, yet Earth restrains Water, preventing its energy from dispersing.

The Vermilion Bird (Zhuque, the Fire deity of the South) represents the essence of Fire, which regulates the balance between Metal and Water. If Water's force becomes excessive, it extinguishes Fire, necessitating Earth's harmonizing role. Through natural phenomena and the relationships of the Five Phases, this passage elucidates the dynamic interactions among the various elements in the alchemical process.

This passage from the Zhouyi Cantong Qi explains the principle of Five Phases mutual generation in alchemy and the miraculous effects of the elixir. No matter how fierce the fire may be, it will ultimately be extinguished by water, and when both disappear, only earth remains. When the True Reverted Elixir (the Daoist immortal pill) is successfully refined, the functions of water and fire are complete.

The three attributes of metal, water, and fire converge and fuse together, all following the fundamental laws of the Five Phases. When water combines with metal and encounters fire, the elixir can be formed. Just as common herbs like sesame (Jusheng) can prolong life, how much more could consuming the Reverted Elixir lead to ascension and immortality? The nature of metal never decays, so when alchemists ingest elixirs containing metallic properties, their lifespans become enduring. The "metal" mentioned here isn't ordinary gold, but rather refers to the essential quintessence of the elixir.

During alchemical practices, the furnace walls should be coated with earth, symbolizing the stabilizing virtue (De) of earth securing the four directions. When the elixir enters the body, it spreads rapidly like wind and rain, nourishing the limbs, making one's complexion radiant, turning white hair black, regrowing teeth, transforming old men back to robust youths, and reverting elderly women to maidenly forms. By altering one's appearance to avoid worldly calamities, such a person may be called a "Zhenren" (Perfected Being).

The Yellow Sprout Elixir (the initially refined pill) transforms as swiftly as gold dust entering water. Water represents metal's transformative process—first turning black, then yellow. Metal corresponds to Yang (father), water to Yin (mother), just as an old man and woman uniting can conceive new life. Once the elixir is perfected, it naturally enables transcendence of worldly suffering. The vigorous youth symbolizes metal's flourishing state, while the "Chanu" (maiden) represents purity.

Like lead powder reverting to lead when calcined, or snow melting back into water when meeting heat, all things return to their origins. In alchemy, cinnabar serves as the primary material, refined with mercury. The Yellow Sprout Elixir is another name for cinnabar—when combined with mercury, it forms the pill. This transformation follows natural principles, just as planting millet yields millet. To achieve an immortal elixir, one must pair materials of corresponding categories.

Planting requires seeds, hatching needs fertilized eggs—success comes easily by following nature's way. Just as male vigor and female softness are natural principles, so too is alchemical success—it requires no forced effort. Different categories cannot transform into each other: swallows don't birth phoenixes, foxes can't nourish horses, water cannot burn upward, nor can fire moisten downward—these are natural laws.

This passage elucidates key principles of alchemical practice. It first explains that gold, water, and lead belong to the same category (referring to metallic transformations in alchemy), but forcibly operating beyond this natural correspondence inevitably leads to failure.

Many talented individuals in the world, though naturally gifted, labor in vain like those possessing inferior fire-starters when lacking proper guidance from enlightened masters. They squander fortunes rigidly following written instructions, attempting Neidan (internal alchemy) through sheer imagination, achieving only confusion. Their measurements and grinding techniques are fundamentally flawed—haphazardly mixing minerals like chalcanthite, mica, alum, magnetite, and sulfur with Jiangxi-produced lead for smelting. How could substances of entirely different natures possibly coalesce? After thousands of failed attempts, some waste their lives from youth to old age, ending in bitter disappointment.

This section laments how people misunderstand the true essence of the Golden Elixir path, blindly pursuing mineral-based alchemy until old age without accomplishment.

The text then observes that even the most sagely rulers—Fu Xi who created the Bagua (Eight Trigrams) to emulate heaven and earth, King Wen who developed the hexagram statements, and Confucius (honored as "Sage for the Multitude") who composed the Ten Wings commentary—though divinely chosen, each with varying achievements, never grasped alchemical mysteries. Like climbing a high tower with closed eyes, they ultimately couldn't perceive the truth—how much less could ordinary people or pretentious scholars? As the Book of Documents states: "Knowing the Dao isn't difficult—the challenge lies in practice."

The six hundred chapters of the Fire Records alchemical texts contain essentially similar teachings, yet ordinary readers neglect deep contemplation while presuming to critique. The author dares not deceive the world with falsehoods, yet fears revealing celestial secrets by writing complete instructions, hence presenting only outlines. Even with such earnest explanations, most still fail to comprehend the fundamental principles. Though the text appears disordered, true wisdom recognizes its profound coherence.

Finally, the metaphor of building golden dikes against floods implies that alchemical success requires mastering correct methods to proceed with natural ease.

This passage describes the metallurgical process in ancient alchemy using symbolic language to depict the interaction of three substances: metal, water, and earth. In alchemical practice, one must first control the water quantity like building dikes against floods (堤防). Metal (金) is introduced first, followed by water, allowing gradual saturation. Specific ratios govern their measurements (metal count fifteen, water count also fifteen) — water as Yin corresponds to the number six, metal as Yang to nine, totaling fifteen.

During operation, precise measurements are observed in the furnace: five parts water show slight excess. Using the standard where ten parts equal one inch and one inch equals one pound, the metal retains a five-part surplus. The combined weight of metal and water remains constant at one pound, while earth — the third element — doesn’t directly participate but envelops the mixture as a protective layer. These three substances intermingle under furnace fire (太阳气, solar Qi), undergoing miraculous transformations.

When heated continuously, the metal first liquefies (液), then solidifies (凝) into a golden product (黄輿). Crucially, excessive or prolonged firing (歲月將欲訖) risks damaging the material’s intrinsic nature. Upon the elixir’s (還丹) completion, the original properties of metal and water transmute and vanish, leaving an ash-like residue that requires grinding before further processing in a high-temperature chamber (赤色門).

Fire regulation alternates between civil (文火, gentle heat) and martial fire (武火, intense flame): seventy days of civil fire initially, thirty days of martial fire finally, with 360 days of sustained civil fire in between — totaling 460 days. Constant monitoring of thermal variations (寒温) and lunar phase adjustments (十二節) guide the firing rhythm, with each cycle restarting upon completion. Here, metallurgy serves as a metaphor for alchemical refinement, emphasizing the critical balance of fire control and temporal rhythms.

When a person's primordial Qi (vital energy) is exhausted and life approaches its end, the hun (ethereal soul) and po (corporeal soul) will disperse. This resembles the third month of winter when the Water Phase governs (among the Five Phases, Water rules winter), the Wood Phase thrives (Water generates Wood), the Fire Phase declines (Fire is conquered by Water), the Earth Phase is trapped (Earth is conquered by Wood), and the Metal Phase rests (Metal generates Water but Water dominates winter).

Yin energy forms the po while Yang energy constitutes the hun. When both Yin and Yang are depleted, life ends. At this critical juncture, if one can refine a purple-red elixir (Huandan, the Reverted Elixir), it enables return to one's original state. "Return" here signifies restoration to the fundamental truth. Humans are originally born through receiving the Dao's Qi, and consuming the Reverted Elixir allows returning to the Dao's source—hence its name.

For a successfully refined Reverted Elixir, taking a daily portion the size of a rice grain (daogui, an ancient minimal measurement unit) through nine cycles of refinement (jiuding refers to repeated purification) achieves miraculous effects. For immediate ascension (yuhua, feathering transformation), one may ingest a full daogui dose at once.

The mutual generation and restraint among the Five Phases follows simple principles: using Water to restrain Fire will extinguish it. Understanding these patterns makes cultivation twice as effective with half the effort. When Water and Fire energies mutually evaporate, metallic luster naturally fades.

The phenomenon of mutual influence between sun and moon often occurs during the lunar month's beginning and end (huishuo). Here Yin and Yang energies intersect like Metal encountering Water. When Water's power peaks (Kan trigram representing Water), it suppresses Yang; when Fire weakens (Li trigram representing Fire), daylight dims. These waxing-waning dynamics of Water-Fire and Yin-Yang transformations all manifest nature's inherent patterns.

Names determine essence; characters derive from inherent qualities. Gold remains perpetually "gold," while the alchemical term "yellow sprout" (huangya, referring to nascent elixir) originates from its characteristics. When metal reverts to its fundamental nature, it becomes the Reverted Elixir—a divine pill achieved through metallic refinement.

I dare not fabricate theories, merely following the sages' teachings (referring to the symbolic system in the Yijing). Ancient records' "dragon and tiger" (alchemical terms: dragon representing mercury, tiger representing lead) actually describe the relationship between Metal and Water. The Yellow Emperor valued golden efflorescence (alchemical product), Prince Huainan refined autumn stone (alum powder), and Wang Yang added yellow sprouts (proto-elixir)—all these methods fundamentally process Metal and Water, differing in name but identical in principle.

True Dao practitioners persist in cultivation, while ordinary minds cannot comprehend. Those mistaking silver for lead fail to understand their relationship with gold and water. From antiquity to present, the Dao's truth remains unchanging.

Sages established these methods to illuminate truth, fearing people might disbelieve. The supreme principle is ultimately plain—these authentic words clearly never deceive us. "Not deceiving me" means these truths deceive no one.

Heaven and Earth (Qian-Kun) serve as the gateway to the Changes, the parents of all hexagrams. Kan (Water) and Li (Fire) form the enclosing framework, rotating like hubs around a central axis. These four primal hexagrams (Qian, Kun, Kan, Li) act as bellows, encompassing the Dao of Yin-Yang like a skilled charioteer holding the reins.

The "Zhouyi Cantong Qi" (The Kinship of the Three) is a foundational Daoist alchemical text that synthesizes the principles of the Yijing (Book of Changes) with neidan (internal alchemy) practice. This passage reveals the core mechanics of alchemical transformation.

Qian (Heaven) and Kun (Earth) represent the fundamental polarity from which all manifestations arise, just as a doorway gives access to the Yijing's wisdom. Kan (the moon, water) and Li (the sun, fire) create the dynamic container within which alchemical work occurs, their interaction resembling wheels turning on an axle. These four primary forces operate like a blacksmith's bellows - through their rhythmic opening and closing, they drive the cyclical transformations of Yin and Yang. Mastering these movements requires the precision of an expert charioteer controlling his team.

This metaphorical language illustrates the essential alchemical process: establishing the foundational polarity of Heaven-Earth (Qian-Kun), then harnessing the catalytic interplay of Water-Fire (Kan-Li) to circulate and refine the vital energies. Just as bellows stoke the furnace's fire and reins guide the chariot's course, the alchemist must carefully regulate these elemental interactions to achieve the golden elixir (jindan) of transformation.

This passage elucidates the principle of Yin-Yang harmonization in Daoist alchemy. Qian (the Creative) represents masculine strength (hard as metal), while Kun (the Receptive) embodies feminine softness (yielding like water). Their mutual containment resembles the cooperation between husband and wife. When Yang Qi takes the lead and Yin Qi receives—just as male and female pair to create life—the Jing-Qi (essence-energy, the fundamental force of cultivation) flows unimpeded.

Among the trigrams, Kan (Water) and Li (Fire) hold paramount importance in alchemy, mirroring the furnace structure where fire blazes below while water rests above. Yet their profound mysteries defy verbal description and transcend pictorial representation. The ancient sage Fu Xi comprehended the root of the Dao by observing the patterns of heaven and earth.

The four elements—metal, wood, water, and fire (corresponding to Qian, Kun, Kan, and Li)—merge in primordial chaos, ultimately returning to the realm of emptiness. The cyclical movement of the sixty hexagrams resembles an endlessly revolving wheel. Using the metaphor of a chariot drawn by the dragon (Qian's Yang) and mare (Kun's Yin): when the enlightened ruler (fire regulation) steers skillfully, the state (alchemical furnace) remains stable; but mismanaged fire control leads to perilous obstacles and national collapse—signifying how failed alchemy destroys the furnace.

Quoting the Zhouyi to illustrate how words and deeds resonate far and wide: the true practitioner (the "Golden Lord," referring to the amalgam of lead and mercury) issues commands within the divine chamber (the furnace's inner space), strictly adhering to the shifts of Yin-Yang solar terms. Just as noble speech uttered indoors elicits responses a thousand miles away, violating hexagram timings in alchemy ensures failure. Special emphasis falls on the winter and summer solstices (the "Two Extremes"), pivotal moments of Yin-Yang transformation for elixir refinement.

(Note: "Golden Lord" is an alchemical term denoting the substance formed during lead-mercury fusion; "divine chamber" refers to the furnace's inner cavity; "Two Extremes" indicates the winter and summer solstices—critical solar terms marking Yin-Yang transition.)

This scripture elucidates the patterns of Yin-Yang transformation and their influence on human affairs. Ancient rulers governed their states in accordance with these transformations, just as the movements of Metal and Wood (among the Five Phases) within objects must follow the laws of heaven and earth.

The text specifies the temporal applications of the "Zhun" and "Meng" hexagrams: Zhun corresponds to the Shen period (3-5 PM) and Zi period (11 PM-1 AM), while Meng aligns with the Yin period (3-5 AM) and Xu period (7-9 PM). These time periods are classified into Yin and Yang categories: Yin-Wu-Xu belong to Yang, while Shen-Zi-Chen belong to Yin. From dawn to noon is Yang time, and from noon to dusk is Yin time.

Each of the sixty hexagrams corresponds to specific days. For instance, during the transition from the last day of the lunar month to the new moon, the Zhen hexagram governs affairs, while the Fu hexagram symbolizes renewal. The two manifestations of Water and Fire represent different virtues: Water governs benevolence (Ren-De), while Fire governs righteousness. Harmonizing with them brings balance between Metal and Water (Yin-Yang), while opposition causes disorder.

Celestial observation must be meticulous—the slightest deviation can invite calamity. Auspicious and inauspicious omens all stem from transformations, particularly the movement of Fire Qi (Yang energy). If temporal calculations err, Metal and Water (Yin-Yang) cannot coalesce, resulting in disasters.

During the summer and winter solstices, when Yin and Yang reach their extremes, abnormal weather may occur: intense heat in winter or frost in summer. Imbalance during the spring and autumn equinoxes leads to irregular winds and rains, droughts, floods, or insect plagues. The Yisi divination method (an ancient practice) identifies the period before the two solstices and two equinoxes as "Li Chen" (Departure Hour). These critical junctures fall in the middle months of the seasons. May and November mark the peaks of Yin and Yang, while February and August are months of Yin-Yang transition.

This passage elucidates the operational principles of Yin-Yang and the Five Phases (Wood, Fire, Earth, Metal, Water) and their application in spiritual cultivation. When Yin (representing the receptive cosmic force) and Yang (the active cosmic force)—the two polar yet complementary energies of the universe—fall out of balance, they generate various transformations and consequences. Just as fire and water become incompatible when unregulated, the relationship between Metal (symbolizing solidity among the Five Phases) and Water (representing fluidity) likewise undergoes shifts.

The text employs metaphorical language: "filial son" symbolizes Water, while "imperial pivot" represents Metal, illustrating how Water, influenced by Metal, flows ceaselessly and reaches distant realms. The harmony or disharmony of Yin-Yang yields four possible outcomes: it may invite calamity or bestow blessings; it can foster peace or ignite conflict. These four manifestations all originate from internal equilibrium, corresponding to the interplay of Qian (Heaven), Kun (Earth), Kan (Water), and Li (Fire) from the Eight Trigrams (Bagua), as well as the dynamic between armor and weapons (symbolizing warfare). When Yin-Yang are balanced, blessings descend and peace prevails; when imbalanced, disasters arise. The key lies in regulating Fire (symbolizing passion and energy among the Five Phases), for excessive Fire becomes as perilous as weaponry.

In cultivation, one must follow natural rhythms: Fire should remain active while Water stays tranquil, just as a carpenter adheres to his plumb line without deviation. The Qi of Fire and Water must align with seasonal changes—Yang dominates daytime, Yin governs night, with clear boundaries between light and dark. The Five Directional Deities (guardians of the cardinal directions) maintain their posts, ensuring Metal and Water neither deplete nor overflow.

The Dao of transformation cycles endlessly: as Yin recedes, Yang advances; as Yang withdraws, Yin returns—an infinite oscillation. During the conjunction of the lunar cycle's end and beginning (when sun and moon meet), Metal and Water intermingle. Practitioners must seize this moment: at dawn, prioritize the Zhen (Thunder) and Zhun hexagrams; at dusk and month's end, emphasize Xun (Wind) and Meng.

In the primordial chaos of creation, Yin and Yang united like paired phoenixes, nurturing all beings through fluid circulation—a divine force as unfathomable as celestial spirits. This is the optimal state for establishing one's life and concealing one's form. As the Book of Changes (Yijing) states: "Benefiting all things harmonizes righteousness," for when all existence aligns, body and mind naturally attain peace.

This scripture elucidates the principles of Yin-Yang transformation during alchemical practices, employing celestial phenomena and hexagram imagery from the Book of Changes (Yijing). The two alchemical elements—metal (representing Yang) and water (representing Yin)—interact while concealed within the vessel.

The movement of alchemical Qi (vital energy) begins in the northeastern region near the constellations of Ji and Dou, rotating rightward like a wheel sprouting new growth. While the sun and moon traverse the heavens rightward, the five planets revolve leftward, converging their energies at the Dou constellation and achieving harmony at high noon. At this moment, the moon reveals its silhouette, all things begin to germinate, metal (Yang energy) releases its essence (Jing), and water (Yin energy) manifests its radiance.

When energy lies dormant in the "hidden pool," signs emerge as luminous essence radiates. Here, the "hidden pool" signifies the refined essence of water, while "luminous essence" denotes the brilliance of metal. When metal energy flourishes, it emits light; when water energy clarifies, it reveals form. In the western region near the constellations of Bi and Mao, tremors serve as verification. Three days after the moon's passage, its essence appears above Bi and Mao, while fire energy takes three days to reach the vessel. Water energy, activated by fire Qi, trembles—hence the lunar phases serve as confirmation.

The initial emergence of Yang energy resembles the "hidden dragon" of the first Yang line (Chujiu) in the Qian hexagram. Yang energy operates in cycles of three, while Yin energy flows through eights. Thus, tremors appear after three days, and circulation begins after eight. Nine, the ultimate Yang number, symbolizes the dragon's transformative power—hence its use in Qian's imagery. In mid-spring (second month), foliage thrives; in mid-autumn (eighth month), fruits ripen. Fire energy sets water in motion after three days and propels metal after eight. Metal, embodying the sun, moves slowly; water, embodying the moon, moves swiftly. The resonances of three and the interpenetration of eight describe Yin and Yang's mutual responsiveness and complementarity. The "hidden dragon's" period of dormancy corresponds to the winter solstice month (Zi month), when metal and water energies first enter the vessel—hence the hidden dragon metaphor.

At the stage of the second Yang line (Jiuer), "the dragon appears in the field," Yin and Yang harmonize in brilliance. When the three-five-fifteen cycle (lunar phase progression) completes, Qian's form takes shape. Here, metal's structure gradually solidifies, mirroring Jiuer's state.

The third Yang line (Jiusan), "the nobleman toils diligently from dawn to dusk," warns against the inevitable decline following climax—the cyclical law governing the rise and fall of the "spirit talisman" (alchemical energy patterns). The Xun hexagram inherits this sequence, requiring steadfast mastery. Xun, representing the eldest daughter, here symbolizes water. The Dui hexagram above Li forms the Ge hexagram, signifying water and fire's conflict preceding transformation. Jiusan does not embody the dragon's supreme virtue, hence the nobleman metaphor. At this stage, Yang energy peaks and must decline—the natural rhythm of Yin-Yang alternation. When Yang culminates, Yin wanes; their struggle generates change. Here, fire beneath the vessel meets water above, creating the state of "water and fire complementing" (Jiji).

This scripture primarily elucidates the changing patterns of the Qian (Heaven) and Kun (Earth) hexagrams from the Book of Changes (Yijing), along with the principles of Yin-Yang transformation.

The fourth yang line (九四) of the Qian hexagram describes a dragon hesitating in the depths, illustrating the wisdom of advancing or retreating according to circumstances when the time is not yet ripe. Like boiling metal and water confined within a vessel—whether rising or sinking, they never leave their container—the key lies in aligning with the flow of events. This phase corresponds to the waning moon around the 23rd day of the lunar month, symbolizing a transitional period.

The fifth yang line (九五) depicts a soaring dragon in the sky, representing a ruler ascending the throne. This is the zenith of pure Yang energy, where the virtue of Metal (金德) occupies its rightful position, radiating auspiciousness.

The fifth yin line (六五) of the Kun hexagram signifies the peak of Yin energy. The yellow skirt symbolizes gentle compliance, emphasizing the importance of cultural virtue over force. This marks the critical moment when extreme Yin gives birth to Yang—Kun, as the mother of all things, begins nurturing new life. Here, the virtue of Water (水德) fully manifests, succeeding Metal.

The waxing and waning of Yin and Yang form an endless cycle: Yang energy rises from the Zi hour (midnight) and culminates at the Si hour (mid-morning), while Yin energy ascends from the Wu hour (noon) and completes at the Hai hour (late night). This alternation unfolds as naturally as the peaceful abdication of a throne.

The top yang line (上九) of Qian, the "overreaching dragon," symbolizes excessive Yang provoking a Yin counterattack, akin to open conflict in the wild. This mirrors the principle of Metal and Water mutually generating one another.

"Using the nines" (用九) refers to applying the way of Yang strength. Qian represents Metal and Yang Fire; only when Metal masters Fire’s nature can the true Dao be realized. Like the rotation of the Northern Dipper (璇玑), which governs the rising and setting of the sun, moon, and stars, the two energies of Yin and Yang circulate ceaselessly in their eternal ascent and descent.

This scripture elucidates the cyclical transformations of Yin-Yang and the Five Phases (Metal, Wood, Water, Fire, Earth) throughout the seasons, along with their correspondences to the sixty-four hexagrams.

Metal (representing contraction) and Water (representing downward nourishment) move unpredictably, rising and falling like the Big Dipper in the heavens. The six lines (yao) of the hexagrams shift in endlessly subtle ways, which is why the Book of Changes (Zhouyi) takes transformation as its foundation. The ceaseless alternation of the six lines in the Qian (Heaven) and Kun (Earth) hexagrams embodies the fundamental principle of cosmic movement.

At the winter solstice (the eleventh lunar month), Yang energy begins its revival. This moment corresponds to the hour of Zi (midnight) and the musical pitch Huangzhong (the first of the twelve pitch-standards), when all things stir with new life. Here, the Qi of Metal and Water has just regenerated, Yin and Yang are in balance, and all beings follow the natural order of growth. The path of Fire (the movement of Yang Qi) begins to manifest, while Metal and Water naturally blend within the alchemical furnace (a metaphor for cultivation).

By the twelfth month (Chou month, corresponding to the pitch Dalu), Yang energy continues to ascend, while the Qi of Metal and Water fluctuates unpredictably. This is the moment of Yin-Yang interaction, symbolized by the Tai hexagram (Earth above Heaven), where "the small departs and the great arrives" (Yin recedes as Yang expands). Firmness (Metal) and yielding (Water) complement each other, and the Qi of Heaven and Earth intermingles.

In the first month (Yin month), Yang energy grows strong, and the Qi of Metal and Water gathers and circulates. By the second month (Mao month), Yang energy peaks as in the Dazhuang hexagram (Thunder above Heaven), where the vigorous Metal Qi becomes active. The entire process unfolds like the spokes of a wheel converging, following the rhythm of celestial timing.

Using hexagrams and musical pitches (the twelve pitch-standards like Huangzhong and Dalu) to describe the waxing and waning of Yin-Yang and the movement of Metal and Water, this passage forms a crucial theoretical foundation for alchemical cultivation (Neidan).

This passage elucidates the waxing and waning of Yin and Yang energies through the seasons, particularly focusing on the dynamic interaction between Metal (representing Yang) and Water (representing Yin).

When metal first melts into liquid form, it mirrors the gradual strengthening of Yang energy in early spring. As temperatures rise to the "Great Strength" hexagram (symbolizing peak vigor), it resembles the solidification of ice. The falling of elm seeds back to their roots serves as a metaphor for Yang energy reaching its zenith before returning to its source.

During the Beginning of Spring when Wood energy flourishes (dominated by Jia Wood), it attracts Yi Wood (containing Metal energy) in response. Thus in mid-spring, the white elm seeds wither and fall - their pale hue symbolizing Metal. This demonstrates Metal energy's cyclical return. Punishment (Yin) and Virtue (Yang) coexist interdependently like day and night. According to the Dunjia Scripture: Yin represents punishment while Yang embodies Virtue. When Yang manifests externally, all things undergo trial; when concealed internally, all things are preserved. The second and eighth lunar months mark the separation of Yin and Yang - in the second month Yang emerges as Yin retreats, while the eighth month shows the reverse pattern. The transformations of Metal-Water and Fire-Water follow this same principle.

The "Resolution" hexagram (Guai) signifies Yin's retreat and Yang's ascent, akin to birds cleansing their feathers of dust. This configuration reveals strong Metal decisively overcoming yielding Water - when Metal dissolves in Water, punishment is avoided. Five Yang lines confronting one Yin line indicates resolution comes easily.

The "Heaven" hexagram (Qian), purely Yang, symbolizes Yang's dominance like the April sun illuminating all directions. Metal energy similarly peaks during this period. After reaching its zenith in the Si month (fourth lunar month), Yang begins declining to interact with Yin. Throughout the year, Yin and Yang each govern half the time - when Yin attaches to Yang, conflict arises just as Metal and Water may sometimes interfere with each other.

The "Encounter" hexagram (Gou) represents initial meeting, like sensing winter's approach by treading frost. When Heaven and Earth meet, all things prosper - analogous to Metal and Water's affinity. The cold spring at a well's bottom corresponds to the Rui Bin musical pitch in the Wu month (fifth month), when Yin energy starts prevailing. The "Well" hexagram shows cities may change but wells remain constant, symbolizing Metal's firm nature maintaining its position. Though summer solstice reaches the Rui Bin pitch of Yang culmination, Yin energy has already begun germinating.

This scripture elucidates the cyclical patterns of Yin-Yang transformation and the dynamic interplay of the Five Phases, using the relationship between metal (Jin) and water (Shui) as a metaphor for energy conversion in spiritual cultivation.

During the fifth lunar month (Wu month), Yin energy begins to grow while Yang energy starts to wane. Here, the power of metal (one of the Five Phases) manifests, yet metal remains concealed within water, making water the dominant force. This mirrors how practitioners should gather their Jing (essence) and Qi (vital energy), sheathing their brilliance while awaiting the opportune moment. After the summer solstice, as Yin expands and Yang contracts, it resembles metal relying on water—water's influence swells while Yang withdraws inward.

By the eleventh lunar month (Zi month), Yang energy lies completely dormant, like a dragon hidden in deep abyss. Practitioners likewise store their energy deep within. At this stage, heaven and earth stand sealed, all life lies dormant—Yin extends while Yang retreats. This resembles metal and water not yet merging, with the two energies of Yin and Yang unable to communicate.

The eighth month (You month) marks Yin's zenith, corresponding to the fourth star of the Big Dipper, Tianquan (governing decisive action). Here all things wither yet secretly harbor vitality, just as an elder woman (symbolizing Yin) may cultivate into a Zhenren (perfected being). Shepherd's purse sprouts during this period, embodying Yang's gestation within Yin.

When Yang energy exhausts itself, it resembles metal dissolving in water (symbolized by the Bo hexagram's disintegration of form). By the eighth month, with Yang depleted, the unpredictable "Shen" (spirit) of Yin-Yang transformation also vanishes. Yet extremity begets reversal—after Yang's exhaustion, it returns to Kunyuan (earth's primordial source), just as water's dominance emerges when metal's energy weakens. This constitutes the natural law governing energy conversion in spiritual practice.

The earth carries the patterns of heaven in its movement. Earth represents yin, while heaven represents yang. Yang qi expands while yin qi contracts, yet yin is not perpetually closed—it awaits yang to initiate growth. Though yang can nurture all things, it must rely on yin to bring them to completion.

Heaven and earth are profound and vast, seemingly veiled by mist and clouds, difficult to approach. Yet observe how the sun and moon shine, how mountains and rivers share breath, how wind and rain follow their cycles, how cold and heat alternate—these phenomena are like an endless, interlinked circle. Moreover, metal (jin) and water (shui) share an affinity, responding to one another without difficulty.

The growth of all things follows specific laws, and the root of these laws lies in the nature of yin-yang transformation—the very principle behind refining the Golden Elixir (jindan). Within the vast cosmic furnace (lu), inside the misty vessel (qi) of alchemy, metal and water cycle and transform in ways too subtle to grasp.

As the Kun hexagram of the Yi Jing states: "At first, one may lose the way, but later, the pattern is mastered." The nature of yin appears supremely soft, yet in movement, it reveals strength; seemingly still, it determines direction. Just as yielding water hardens into ice, metal (jin) governs the movement of water (shui)—this is the natural order.

The Tai hexagram reminds us: "No path remains forever level without tilting, no journey goes only forward without return." When yang reaches its zenith, it turns toward balance—this is the natural state of yin-yang harmony, like the blending of metal and water.

Yin and yang transform into one another; flourishing and decline, growth and decay, are mutually dependent. Where yang fosters, yin completes; where yin withdraws, yang renews. The principle of metal-water transformation follows this same deepening interdependence.

The Qian hexagram (yang) initiates the birth of all things, while the Kun hexagram (yin) brings them to fulfillment. Where yang arises, yin responds; where yin arises, yang responds—this cyclical interplay forms an endless loop. The mutual transformation of metal and water, fire and water, revolves without cease.

When an emperor can govern as effortlessly as directing the flow of water, the hexagram imagery of "the soaring dragon in the ninth-fifth position" (the fifth line of the Qian hexagram in the Yijing) symbolizes the imperial throne—riding six dragons to command heaven (representing the emperor's rule over the realm)—signifying perpetual sovereignty. "Eternal existence" refers to an indestructible state, akin to the ceaseless movement of the heavenly Dao symbolized by the Qian hexagram, enduring through millennia. The Qian hexagram corresponds to the Metal phase, which embodies permanence.

Those who seek to cultivate their nature and prolong life must deeply contemplate the origin of life. To extend one's lifespan and comprehend the Dao, returning to one's original essence, one must reflect on the source of one's physical form. Only by understanding the root of life can the path of cultivation succeed. Neglecting this renders all efforts futile. Just as refining the Golden Elixir (Neidan, the internal alchemical process of achieving immortality) requires grasping its fundamental principles, attempting it without even basic knowledge is like pointlessly stoking an empty furnace.

Primordial Jing (essence) disperses like clouds, relying on primordial Qi to generate all things. Primordial Jing is none other than primordial Qi, which arises from the interaction of Yin and Yang. The vital essences of Yin and Yang give birth to all beings. Humans are but one manifestation within heaven and earth, possessing a body of Metal and Water (Daoist cosmology associates the human body with these phases). Only through the harmonious interplay of Fire and Water (Yin-Yang balance) can the Golden Elixir be forged.

Yin and Yang are the measures of all things and the abodes of the hun (ethereal soul) and po (corporeal soul). The Yin spirit belongs to the lunar po, while the Yang spirit belongs to the solar hun. These souls depend on each other like mutual dwellings—this "dwelling" is the cauldron of alchemy. If even Yin and Yang must cooperate, how much more must Metal and Water (essential elements in alchemy) complement one another? As the Shangjing states: "When East and West unite, the hun and po naturally attract each other."

Nature (Xing) and emotions (Qing) each have their roles: Nature governs the interior, establishing firm boundaries. Zhuge Liang said, "Nature is life; nature connects with life," akin to Metal and Water congealing within a vessel to form solid borders. "Yin'e" refers to a state as unyielding as frozen ice. Emotions govern the exterior, like constructing city walls. Only with intact walls can the people dwell securely. Here, the alchemical cauldron is likened to a fortified city—only then can Metal and Water transform and generate. If the cauldron lacks stability, the essences scatter, just as humans without protective walls have no refuge.

All this follows the laws of Qian (Heaven) and Kun (Earth). Qian is Metal; Kun is Water. The key to refining the Golden Elixir lies in their harmonious union—not forced by human will but achieved through alignment with natural principles.

When the Qian hexagram moves, it does so with unwavering strength, and the vital essences flow naturally. The Xici commentary states: "In stillness, Qian is unified; in motion, it is steadfast, thus it generates all things." Qian represents Metal, whose flowing nature disperses essence. Kun, in stillness, embraces all, providing a dwelling for the Dao.

The Zhouyi Cantongqi (Token for the Agreement of the Three According to the Book of Changes) primarily elucidates the principles of Yin-Yang transformation and Golden Elixir (Jindan) cultivation. The Kun hexagram (symbolizing earth) gathers energy in stillness and releases it in motion, thereby giving birth to all things. Kun corresponds to water, which rests above metal (Jin), much like a shelter protecting its inhabitants. The forceful Yang Qi dissipates after being expended, while the gentle Yin Qi nourishes and fosters growth.

The cyclical interplay of Yin and Yang follows nature's immutable law. When metal (representing Yang) enters water (representing Yin), genuine transformation occurs. Numerical symbolism illustrates these changes: odd numbers (1, 3, 5, 7, 9) signify Yang, while even numbers (2, 4, 6, 8, 10) denote Yin—their sum of fifty-five embodies the cosmic number of heaven and earth. The number nine aligns with the Qian hexagram's (pure Yang) "overreaching dragon's regret" (a warning against excessive ascent), seven with "the dragon soaring in the sky" (a phase of flourishing potential), and six and eight with varying states of the Kun hexagram (pure Yin).

Golden Elixir cultivation requires precise attunement to Yin-Yang transitions. Metal (white) symbolizes the masculine, fire (red) the feminine; their union resembles water becoming stabilized. Water ranks first among the Five Phases (Wuxing), and the Elixir's transformative secret lies within it. As Laozi states, "The highest virtue is like water"—its purity mirrors the Dao's origin and forms the foundation for refining the Golden Elixir.

The Dao (Way) transcends form and defies description. The path to the Golden Elixir is profoundly mysterious, beyond ordinary comprehension. Initially, metal and water remain separate, like distinct egg white and yolk. Metal weighs approximately one jin (ancient measure), water eight liang; their combined weight remains unchanged after alchemical fusion. Through years of tempering, as water crystallizes into ice, the practitioner's bones and organs gradually transmute into a golden body—an exact and flawless transformation.

This passage employs Yin-Yang hexagrams and Five Phase interactions to expound the alchemical principles of Yin-Yang union and water-fire equilibrium (Shuihuo Jiji) in Neidan (internal alchemy), emphasizing the critical importance of timing and gradual progression.

The process of refining the Golden Elixir (Jindan) resembles an infant developing in the womb. The firing process (referring to the controlled application of heat in alchemical practice) begins in the eleventh month and concludes in the tenth, completing a full annual cycle. At this point, the Golden Elixir is perfected and removed from the furnace, much like a newborn emerging from its mother's body. Freshly refined elixir has a soft texture, smooth and fine like molten lead.

Two natural phenomena illustrate the resonance between Yin and Yang energies: when a yang-sui (ancient bronze solar mirror) is aimed at the sun with mugwort placed upon it, fire can be quickly obtained; when a fang-zhu (ancient lunar water-gathering mirror) is directed at the moon with a vessel beneath it, dew condenses in moments. Though the sun and moon reside in heaven while fire and water belong to earth—separated by over thirty thousand miles—their Yin-Yang interaction transcends spatial limitations, achieving instantaneous connection.

This principle applies equally to human cultivation. The Zhouyi states: "Observe phenomena nearby in one's body, and distantly in all things." The "near" refers to the metal-water (Jing-Qi) within the human form, while the "distant" denotes the essence of sun and moon. Though subtle, Yin and Yang follow natural patterns. Yang energy condenses as fire, whose quintessence becomes the sun; Yin energy coalesces as water, whose essence forms the moon. Should one doubt this resonance, how then could fire and water manifest? The Dao of Golden Elixir originates precisely in these Yin-Yang transformations, naturally producing miraculous efficacy.

Practitioners must guard their cultivation as carefully as protecting their own eyes and ears. The Kan trigram represents ears, Li trigram symbolizes eyes—together embodying water and fire as the elixir's foundation. Sensory gates must be closed to prevent vital essence (Jing-Qi) from dissipating. The true Golden Elixir (here metaphorically called the "Perfected Being") should remain concealed like treasures in deep abyss, circulating within the furnace (the "vessel") according to cosmic rhythms. Within the cauldron, water and fire intertwine and rotate like a wheel's hub—movement and stillness balanced in endless cycles. Fire's nature is active, water's nature tranquil; these two energies perpetually resonate and transform without cease. This constitutes the fundamental principle of Golden Elixir cultivation.

This passage explains the principle of water-fire interaction and Yin-Yang harmony in Daoist Neidan (internal alchemy) practice. The Li trigram (symbolizing fire) circulates protective energy within the body, while the Kan trigram (symbolizing water) remains tranquil without reckless movement. The Dui trigram (symbolizing the mouth) requires careful speech and restrained action.

During cultivation, fiery Qi circulates protectively within, while watery nature remains still externally. The mouth should remain sealed as if bound by three coils of rope—speaking not, the ears hearing no worldly distractions, following the natural Dao like migrating geese that seldom call. This describes how the activation of true fire within requires the assistance of true water to ascend; if these two fail to unite intimately, the vital essence (Jing) may scatter.

Water, fire, and mouth form three locked gates, maintaining relaxed openness within the body's "empty chamber." Metal (lung Qi) and water (kidney Jing) abide in quiet Wuwei (non-action), merging with the Dao's emptiness, preserving the natural state beyond thought. Essence flows naturally with water-fire Qi through the body, focused without dispersion—what's called "horizontal-vertical" refers precisely to essence leakage.

Practitioners maintain singular concentration, their sleep still resonating with the Primordial Shen (innate spirit). "Existence-vanishing" denotes the waxing and waning interplay of water-fire Qi. Persistent practice gradually reddens the complexion and strengthens bones—not merely through Yin-Yang interaction, but more essentially through water-fire harmonization.

Only by expelling Yin-pathogenic Qi can one establish pure Yang embodiment. Here "multitudinous Yin" signifies turbid essence, while "proper Yang" indicates true metal Qi. When turbid essence transforms into true metal Qi, pathogenic energy naturally dissolves. Uninterrupted cultivation makes inner Qi circulate like rising mist and rain, akin to spring's life-nourishing dew or melting snow's smooth flow.

Essence descends from crown to feet, cycling back upward—this golden-water fusion constitutes the "Perfected Being" (internal elixir). True Qi endlessly circulates, quietly filling the entire body. The term "fullness" here describes that serene plenitude when genuine Qi suffuses one's being.

When things reach their extreme, they return to their origin—this is the verification of the great Dao. Gentleness and non-contention are the essence of De (Virtue). When the two qi (energies) of Yin and Yang return to their foundation (referring to the fundamental elements that constitute all things), it manifests the Dao. What is called "returning to the origin" means returning to concrete vessels (qi), and these vessels are precisely the carriers of the great Dao. Speaking of gentleness, it is like water—water appears soft yet contains the resilient power of De, ultimately achieving the firmness of metal.

Just as using a hoe to clear weeds and impurities from a field, even the finest particles of soil will become loose and harmonious. Here, "finest" refers to the essence of metal, while "impurities" symbolize the dregs of water. When the impurities in water are cleared and transformed into metal, even the tiniest parts will reach a state of harmony and smoothness. Turbidity is actually the path to clarity, just as prolonged darkness naturally gives way to light—turbid water, after settling, will eventually reveal the clear nature of metal. When metal fully takes form, the characteristics of water naturally vanish.

People in the world often become infatuated with minor techniques (such as absorbing the essence of the sun and moon, sexual cultivation, daoyin breath exercises, and visualization methods) without understanding the depth of the great Dao. These minor techniques merely waste energy and ultimately bring no real benefit. How could they comprehend the wondrous state of refining the Great Returning Elixir (the highest method of Daoist cultivation)? Abandoning the proper path for shortcuts, the more one seeks quick results, the further they stray from success. The "proper path" refers to the cultivation of the Great Returning Elixir, while "quick results" denote the effects of minor techniques. People always complain that the elixir takes too long, unaware that seemingly fast-acting minor techniques actually obstruct the path of cultivation.

This is like a blind person refusing a cane or a deaf person listening to music—those obsessed with minor techniques are like blind people without canes, or deaf people unable to discern sounds. It is also akin to searching for pheasants and hares in water, or seeking fish and dragons in the mountains—if the wrong materials are used in alchemy (metal and water not harmonizing), it is like looking for things in the wrong place. It is like planting wheat but expecting millet, or drawing a circle but desiring a square—if alchemy violates the natural principles of material interaction, it is doomed to futility.

Even if one exhausts their heart's strength and toils all year, they will hardly see any results. Without understanding the principle of metal generating water, all effort is in vain. Know that the true method of "ingesting" (alchemy) is actually simple and not cumbersome. The path of the Returning Elixir only requires mastering the application of four elements—metal, water, and fire. The method is straightforward and uncomplicated; though it requires time to accumulate, the actual expenditure is minimal.

The Flowing Pearl of the Sun (referring to mercury) is always prone to dissipation and loss, and must be stabilized with the Golden Flower (the essence of metal). Mercury is extracted from cinnabar (cinnabar is the crystallization of solar essence), and when exposed to fire, it scatters. Thus, the essence of metal is needed to capture it. When mercury is retained by metal, the two can mutually depend on each other and will not disperse during the refining process.

This passage elucidates the wondrous process of mutual transformation among the Five Phases (Metal, Wood, Water, Fire, Earth) during alchemical practice.

When metal is refined by fire into liquid form and combines with water, it gradually solidifies into an ice-like substance. Here, "metal" symbolizes the metallic essence in alchemy, while "water" represents liquid essence. When metallic essence meets the proper firing temperature, it first melts into a watery state, forming crystalline structures resembling horse teeth.

The mutual harmonization of Yin-Yang (metal as Yang, water as Yin) follows natural laws, yet alchemical practice requires conscious control of this process. Like a mother nurturing her child who later repays her care, metal is born from water (condensing from liquid form), while water in turn nourishes metal, creating a cyclical generative relationship.

Earth plays a pivotal role among the Five Phases, acting like a strict father disciplining descendants. Earth generates metal, metal generates water, and earth regulates the flow between metal and water. The Five Phases each dominate in different seasons, and alchemy must follow these cyclical changes. Although earth produces metal, metal conversely restrains earth—when metallic substances dissolve into water through Yang energy, this represents the proper alchemical path.

The "three-five and one" principle refers to water (one) plus fire (two) equaling three, working in concert with earth (five) and the water within the vessel (one). The essence of alchemy lies in the harmonious unity of these four elements, achieving perfect fusion of Yin-Yang and vital energies (Qi).

These alchemical mysteries cannot be fully expressed in writing—they require oral transmission and heart-mind realization to truly comprehend.

During the alchemical process, the Zi hour (midnight, Yin) rotates rightward while the Wu hour (noon, Yang) spirals leftward, symbolizing the dynamic interplay between metal (Yang) and water (Yin) under controlled firing. The Mao hour (sunrise) and You hour (moonrise) represent how metal and water mutually define and complete each other, like the dragon (symbolizing Yang) and tiger (symbolizing Yin) attracting and nourishing one another to jointly achieve perfection.

This scripture primarily discusses the principle of mutual generation and restraint among the Five Phases (Wuxing) in Daoist alchemy, emphasizing that elixir refinement must follow natural laws.

The Azure Dragon represents water, while the White Tiger represents metal. The fusion of metal and water is like savoring exquisite flavors. When the Fire Star (Yinghuo) moves westward and the Metal Star (Taibai) traverses the heavens, wherever this destructive energy descends, nothing remains standing. The Fire Star belongs to fire, the Metal Star to metal - when metal receives fire's energy, it circulates within the alchemical furnace.

Just as cats hunt mice and sparrows fear hawks, all things have their natural counterforces. When water encounters fire, it's like hounds catching rodents or eagles seizing sparrows - nothing escapes submission. Those who fail to comprehend the principle of mutual generation between metal and water merely spout empty words.

Countless seekers have exhausted their fortunes pursuing elixirs, leaving their families starving. Throughout history, innumerable have sought immortality, yet truly successful cases are exceedingly rare - all because they violated natural principles. Only those who encounter true opportunity and perceive subtle signs can deduce the complete process through analogical reasoning.

The Five Phases mutually generate and restrain each other, serving as each other's "parents." The mother nourishes and sustains, while the father bestows vital essence (Jing) and Qi - when condensed into form, they become as enduring as metal and stone. Only through focused cultivation without energy leakage can one attain the great Dao (Daode). As the Divine Pivot states: "When Yin and Yang energies interact, they form the Five Phases (metal, wood, water, fire, earth) in endless cycles." Metal generates water, water generates wood, wood generates fire, fire generates earth, earth generates metal - this is mutual generation. Metal melts in fire, fire extinguishes in water, water stops at earth, earth decays with wood, wood breaks by metal - this is mutual restraint. Metal acts as father, water as mother - their union produces vital essence. Though water and fire constantly transform, metal and water each flow separately, yet if their forms remain undispersed, they achieve the orthodox path - this is the returned elixir (Huandan).

Its efficacy is as immediate as a shadow appearing beneath a pole or echoes resounding in an empty valley. Among heaven and earth's wonders, nothing surpasses the transformations of Yin-Yang - the primal source of creation, with Qian (Heaven) and Kun (Earth) being the foundation of the returned elixir. Here, "heaven and earth" refer specifically to metal and water.

Should one mistakenly consume poisonous herbs like wild aconite or croton, immediate paralysis follows. This warns that alchemical practice must adhere to proper methods without deviation.

This scripture primarily elucidates the principle of Yin-Yang union in alchemical practice and the natural way of metal-water mutual generation.

The text mentions that just as King Wen of Zhou used yarrow stalks for divination, Confucius observed celestial phenomena, Bian Que applied acupuncture to heal, and Wu Xian beat drums to invoke blessings—all traditional methods with their own specific patterns—so too does alchemy follow its inherent laws. Though wild kudzu and croton seeds are poisonous, the union of metal and water can refine the Golden Elixir (Jindan, referring to the alchemical pill). The "Riverside Maiden" (referring to mercury) mentioned here possesses spiritual qualities; when exposed to fire, it scatters and must be stabilized with "Yellow Sprouts" (referring to lead). Just as ghosts hide in the unseen depths and dragons conceal themselves in deep springs, without the restraint of "Yellow Sprouts," mercury would dissipate entirely.

The text then expounds on the vital importance of Yin-Yang union. Like a hen laying eggs—if there is no rooster to fertilize them, the eggs will never hatch chicks. Here, the "Three-Five" refers to the three essential elements of water, fire, and earth, while "hardness and softness" denote metal and water. Only when the Qi of fire and water intermingles and the forms of metal and water unite can the true elixir be produced. These are natural laws, just as fire inherently rises and water naturally flows downward—no human instruction is needed.

Finally, the text cites the Tuan commentary on the Qian hexagram from the Book of Changes (Yijing) to illustrate how the Way of Qian (the heavenly principle) governs all things, and the transformative nature of metal follows the same pattern. Observing the process of female-male coupling and the binding of hardness and softness is akin to the intermingling of fire-water Qi causing metal-water coagulation—a natural law in harmony with the Eight Trigrams (Bagua, referring to the patterns of Yin-Yang transformation).

This scripture elucidates the natural principles of Yin-Yang mutual generation and harmony. Heaven and Earth regulate the alternation of cold and heat according to the eight solar terms (Bajie), and distribute Yin-Yang through the Eight Trigrams (Bagua) - none of this requires deliberate manipulation by any craftsman. The so-called "skilled craftsman" refers to the Creator, yet the interaction of Yin-Yang's hardness and softness occurs spontaneously, beyond any Creator's forced control.

Consider how male and female unite to produce offspring: when the male mounts the female, the naturally Yang male faces Yinward, while the naturally Yin female faces Yangward. This principle applies not only in life but persists after death. This isn't taught by parents, but arises from Yin-Yang's natural laws. This metaphor illustrates how metal (Yang) and water (Yin) combine spontaneously without human intervention.

The Kan trigram (representing the moon, Yin) symbolizes masculinity, while the Li trigram (representing the sun, Yang) symbolizes femininity. When the sun conceals its radiance, the moon displays its brilliance; when the sun receives the moon's influence, it suffers no damage. This resembles metal dissolving in water, with water permeating the metal's interior - both transform mutually without losing their essential nature.

When Yin-Yang becomes imbalanced, Yin energy grows excessively. Like solar eclipses occurring during lunar conjunction (new moon), where the moon obscures the sun, this symbolizes Yin encroaching upon Yang. Similar celestial disruptions occur when fire and water clash in mutual conquest.

Male and female (metal-water) must coordinate harmoniously, nourishing each other through rhythmic exchange. Masculine and feminine (metal-water) intermingle, with like seeking like. When metal transforms into water, it flows unpredictably; when fire transforms into earth, it solidifies. This mirrors the male's active initiative and the female's receptive stillness. Yet excessive indulgence leads to bondage by Yin forces.

Through abundant natural phenomena and Yin-Yang/Five Phases metaphors, this passage demonstrates that Daoist cultivation must follow nature's laws of Yin-Yang equilibrium and the harmonious interplay of hardness and softness.

This passage explains the principles of mutual generation and restraint between Yin-Yang and the Five Phases in Daoist alchemy. When metal (金) encounters fiery Qi, it disperses into water but becomes constrained by water. Here, the "po" (魄, yin spirit) is used to restrain the "hun" (魂, yang spirit), preventing excessive dissipation of energy. The harmonious interaction of these two spirits mirrors the balance between water and fire, ensuring no imbalance between cold and heat occurs.

Alchemical practice requires precise timing, adjusting the firing process according to seasonal changes. To understand how metal and water fuse, one must first observe the transformations in the trigrams. For instance, the new moon (初一) corresponds to the Zhun hexagram, while dusk corresponds to the Meng hexagram—both critical temporal nodes in alchemy.

Cinnabar (丹砂, the primary alchemical material) and the essence of water (水精) require the participation of metal to achieve fusion. Water emerges from cinnabar, and its nature transforms upon encountering metal, ultimately forming a state where metal and water blend seamlessly. Once combined, this metal-water mixture interacts further with fire and water, creating a chaotic intermingling of the four elements (metal, water, fire, and water again). This dynamic resembles the pairing of the dragon (阳, yang) and tiger (阴, yin), where the dragon represents odd numbers (water's number is one) and the tiger even numbers (metal's number is four).

The text correlates the five internal organs with the Five Phases: the liver belongs to Wood and is associated with the color green, symbolizing the father (pure yang of the East); the lungs belong to Metal and are white, representing the mother (pure yin of the West); the kidneys belong to Water and are black, embodying the child (as Water is generated by Metal). Qi serves as the source of the Five Phases, and in the initial stages of alchemy, one must focus on the three colors—green (Wood), white (Metal), and black (Water)—along with the fiery red glow of Qi.

Metal, Water, and Earth all return to the central Earth of Wuji (戊己土, the stabilizing force that restrains Water's flow). Metal is firm, while Water is yielding, and under the influence of fire, they undergo continuous transformation. The Azure Dragon of the East belongs to Wood, and the White Tiger of the West belongs to Metal. The movement of the sun and moon resembles the warp and weft of weaving (sunrise at mao hour, moonrise at you hour), symbolizing the natural rhythm of Yin-Yang interaction.

This scripture employs natural phenomena like metal and water, yin and yang, to illustrate the principles of alchemical practice (referring to both internal alchemy [Neidan] and external alchemy [Waidan] in Daoist cultivation). Metal represents yang, while water symbolizes yin—they interweave like the warp and weft of fabric. When yin and yang unite, it resembles the joyful merging of Virtue [De] (yang) and Restraint (yin). Yang governs growth and expansion, yin oversees contraction and consolidation; only through their harmonious interaction can the cycle of life perpetuate endlessly.

When elm trees wither in the second lunar month, the celestial star Tiankui (the first star of the Big Dipper) moves to the Mao position (east). During the Spring Equinox, metal qi dominates—vegetation begins to flourish yet simultaneously sheds, much like elm seeds turning white and falling. In the eighth month when wheat grows, the star Tiangang (the seventh star of the Big Dipper) resides in the You position (west). Autumn's energy prompts plants to bear fruit; what appears as withering actually harbors new life. These phenomena embody the cyclical alternation of yin-yang and the mutual generation of metal and water.

The midnight hour (governed by northern water qi) and noon (governed by southern fire qi) mirror each other north and south, akin to the hexagram "Water and Fire Complementing" from the Yijing (symbolizing yin-yang harmony). Nine represents yang, one signifies yin—their perpetual cycling resembles the alchemical Dao that germinates at the winter solstice (the beginning of the "Jianzi" month).

The text cites ospreys from the Book of Songs as metaphor: the male never dwells alone, nor does the female reside singly—just as metal and water must fuse within the alchemical cauldron. The Dark Warrior [Xuanwu] (northern water deity depicted as entwined turtle-snake) also embodies this principle through its coiled serpent and tortoise, symbolizing indispensable yin-yang cooperation. The mutual seeking of feminine and masculine, the merging of metal and water—these constitute the foundational truth of alchemy.

Note: In alchemical terminology, "metal and water" often denotes substances like lead and mercury, while secretly paralleling the yin and yang qi within the human body. "He Kui" and "Tian Gang" are names of Big Dipper stars used by ancients to determine seasonal transitions. "The beginning of Jianzi" refers to the eleventh lunar month containing the winter solstice—Daoists regard this period of nascent yang qi as optimal for commencing cultivation.

This scripture employs metaphorical language to illustrate that alchemical practice (the Daoist methods of cultivating Neidan [internal alchemy] and Waidan [external alchemy]) must follow the natural principle of Yin-Yang harmony. The text mentions that the turtle and snake (symbolizing Yin and Yang) must cooperate with each other—just as attempting to marry two women (representing pure Yin) would be futile, even with the mediation of eloquent matchmakers like Su Qin and Zhang Yi (famous persuaders of the Warring States period). In the end, such a union could never truly take place, mirroring how pure Yang and pure Yin cannot naturally merge.

It further points out that if the ingredients used in alchemy are incorrect or improperly balanced, it would be like pouring water onto a stone—no reaction would occur. Even if legendary figures like the Yellow Emperor (mythical progenitor of Chinese civilization), Taiyi (a revered Daoist deity), the Eight Masters (Liu An’s eight disciples, famed for their alchemical expertise), or the King of Huainan (a Han dynasty noble devoted to alchemy) were to personally conduct the process—erecting altars, paving steps with jade, offering sacrifices of qilin and phoenixes, kneeling in devout prayer, and observing purification rituals (Zhaijiao, the cleansing rites before Daoist cultivation)—their efforts would still be in vain if the ingredients themselves were flawed.

Finally, the text uses analogies like mending a pot or treating a wound: using glue to repair a pot, applying sulfur to a sore, cooling with ice, or reducing fever with hot water are all fundamentally misguided methods. Similarly, attempting to refine elixirs by mixing mineral-based ingredients (metallic and stone materials used in alchemy) with water violates natural principles and is doomed to fail. The passage emphasizes that alchemy must strictly adhere to the laws of ingredient compatibility and Yin-Yang equilibrium.

The ancient sages who attained the Dao embraced profound truths within their hearts (xuan refers to the profound Dao, while zhen signifies the authentic Dao). By ingesting elixirs refined in the Nine Cauldrons (legendary vessels cast by the Yellow Emperor), they achieved complete harmony with the Great Dao, reaching a formless and imageless state. They nurtured their Jing (essence) and Shen (spirit), cultivating primordial Qi (the three primordial energies of heaven, earth, and humanity) that converged within their bodies. This practice strengthened their sinews and bones, expelled all pathogenic influences, and allowed righteous Qi to dwell permanently within. Through sustained cultivation, they ultimately underwent a radical transformation to become immortals.

Legend tells how the Yellow Emperor attained immortality after casting the Nine Cauldrons at Mount Jing. These vessels were named: the Cauldron of Celestial Radiance, the Cauldron of Earthly Radiance, the Cauldron of Human Radiance, the Cauldron of Solar Radiance, the Cauldron of Lunar Radiance, the Cauldron of Stellar Radiance, the Cauldron of Wind Radiance, the Cauldron of Sound Radiance, and the Cauldron of Numinous Radiance. The "three primordial energies" represent the foundation of Qi, while "righteous Qi" constitutes the origin of the Great Dao. To achieve daylight ascension as an immortal, one must refine the supreme Golden Elixir—all other methods are but wasted effort.

Wei Boyang (revered as Lord Wei), moved by compassion for later generations of truth-seekers, revealed essential cultivation methods through illustrated texts based on ancient classics. Yet to protect celestial secrets, he deliberately concealed crucial teachings beneath surface meanings—using mineral names as metaphors and incorporating seemingly contradictory statements that only genuine adepts could decipher.

These esoteric methods were traditionally passed down only within lineages—from father to son, grandfather to grandson—making true understanding inaccessible to ordinary people. Without mastery of alchemical arts (the Way of furnace fire) or profound investigation of cosmic origins, even a hundred generations wouldn't suffice for comprehension, let alone ordinary descendants.

Some seekers abandoned official posts, farmers neglected fields, merchants discarded goods, and scholars embraced poverty—all in pursuit of the Dao. Yet without understanding true cultivation methods, they merely squandered resources in foolishness. Distressed by this, Lord Wei composed this scripture.

The text presents clear, concise teachings without unnecessary complexity. Through the framework of the Four Trigrams (likely Qian, Kun, Kan, Li) and Five Spirits (possibly referring to organ spirits or Wuxing deities), it achieves remarkable succinctness. All listed ingredients are authentic with precise proportions, though deliberately obscured through cryptic language requiring wise interpretation.

The measurements for "metal and water" (alchemical terms for fundamental substances) must be determined through Yijing hexagram analysis. Other seemingly random data are intentional riddles—true wisdom reveals their meaning upon careful study.

Heaven and Earth constitute the ultimate models for emulation, their profound mysteries (the abstruse principles between them) spanning countless miles.

This scripture elucidates the principles of Yin-Yang transformation and fire regulation during alchemical cultivation, using celestial phenomena as metaphors for various stages of the elixir refinement process.

The opening passage observes that although heaven and earth operate at vast distances, their principles can be comprehended through resonance. When the River Drum star approaches the Northern Dipper, it foretells impending conflict—just as excessive fire during alchemy triggers danger.

The passage "晷景忘前却" discusses fire regulation: when the flames reach their zenith (nine being the ultimate Yang number), earth (represented by "the Emperor above") must restrain them, causing metal ("the King" representing gold) to retreat and adjust. Otherwise, the liquid medicine (water element) will evaporate and dissipate. This mirrors how river waters flow seaward when their sources run dry.

Yin and Yang energies circulate between midnight (Zi hour) and noon (Wu hour). The transitional hours of Yin (3-5am) and Shen (3-5pm) mark critical junctures for energy conversion—like the Northern Dipper guiding direction, one must balance water and fire to stabilize the alchemical foundation.

Vivid metaphors describe the refinement process: medicinal ingredients are placed within mountain-shaped crucibles (zengshan), with roaring fires beneath. The White Tiger (western metal energy) leads the way while the Green Dragon's (eastern wood) essence harmonizes behind. The Vermilion Bird (southern fire) dances above, generating iridescent radiance.

Finally, the text prescribes using the four celestial creatures (Green Dragon, White Tiger, Vermilion Bird, Black Tortoise) with central earth energy to weave a "net" containing the crucible's contents. Like an infant crying for its mother, the medicinal liquid churns violently within the boiling cauldron.

This scripture describes the wondrous phenomena arising from the interaction of water and fire during the alchemical process. When water is constrained by fire, it manifests in mutable states: at times producing infant-like cries without becoming hoarse, at other times bubbling ceaselessly day and night like boiling water. These manifestations resemble a bird's broken feathers or a dragon's bristling scales, appearing like layered stalactites or winter ice formations in tiered, undulating patterns. Though difficult to describe precisely, all these phenomena reveal the protective presence of the Four Divine Symbols (Azure Dragon, White Tiger, Vermilion Bird, Black Tortoise) and the radiance of the Five Planets.

The text then expounds on the principle of Yin-Yang pairing: metal (representing Yin) and water (representing Yang) harmonize within the alchemical cauldron. The Azure Dragon resides in the eastern constellation Fang (one of the Twenty-Eight Lunar Mansions), corresponding to the Mao hour (5-7 AM) in the second lunar month, symbolizing spring's vital burgeoning. The White Tiger occupies the western constellation Mao, aligning with the You hour (5-7 PM) in the eighth month when pure Yin dominates, causing both metal and water to congeal. The Vermilion Bird dwells in the southern constellation Zhang, corresponding to midday when Yang energy peaks while Yin first stirs. When these three (Azure Dragon, White Tiger, Vermilion Bird) converge, their union resembles the harmonious gathering of family members.

The foundation of alchemy lies in the two substances of metal and water, yet ultimately evolves through the numbers of three (water, fire, earth) and five (the numerical value of earth). Water's number is one, fire's is two—their sum yielding three, hence the origin of the "three-five" principle. All these elements ultimately coalesce within the alchemical cauldron. The specific refining methods (regulating civil and martial fire phases) follow the same procedures described in previous scriptures and thus require no repetition here.

This scripture elucidates the core principles of alchemical transformation and the natural laws governing change. In the alchemical process, substances undergo transformations from white to yellow, then to reddish-black, resembling the state where metal and water intermingle. The "First Cauldron" mentioned here symbolizes the foundational stage of practice—as simple and unadorned as the Yellow Emperor's initial alchemical work where he consumed plain rice daily. Through three years of such practice, one may attain the Dao.

Natural transformations follow their own inherent patterns, devoid of any deviant methods. Just as the Qi of mountains and marshes rises to form clouds and rain, or as parched earth turns to dust; when flames extinguish they become ashes, plant dyes can yellow cloth while indigo produces green ribbons; leather boiled becomes glue, and fermenting yeast turns into wine—substances of the same kind interact effectively, while dissimilar ones rarely succeed.

Specifically in alchemy: when mercury combines with lead, it produces yellow crystals (Yellow Sprouts), and when these Yellow Sprouts react further with mercury, the Returning Elixir (Huandan) is formed. This exemplifies the principle of "like begets like." Attempting to refine gold from unrelated ores through brute force will inevitably fail. Such exquisite alchemical arts are profoundly real—Wei Boyang (Lord Wei), concerned that later generations might doubt, deliberately explained these principles as clearly as the movement of stars or the natural flow of ocean tides.

In practice, one must repeatedly contemplate and observe, undergoing countless trials before attaining realization. When the Shen (spirit) becomes lucid, sudden enlightenment may dawn. By steadfastly adhering to the true path, the gateway will eventually appear. The Dao of Heaven shows no partiality—it is transmitted only to virtuous sages. With unwavering sincerity, the divine will naturally respond.

The original text of The Kinship of the Three (Zhouyi Cantongqi) presented its principles succinctly. This commentary expands and refines it, rendering the system more coherent. Ancient language was terse yet profound, while modern expressions often remain superficial. Concerned that students might struggle to comprehend, Lord Wei employed the mutual generation and restraint of the Five Phases (Wu Xiang Lei) to elucidate the Dao of the Yi Jing, thereby fully revealing its profound mysteries.

This scripture primarily elucidates the principles and methods of cultivating the Golden Elixir (Jindan) in ancient times.

The alchemical arts of Huang-Lao (the combined teachings of the Yellow Emperor and Laozi) are indeed credible. They used Earth (one of the Five Phases) to stabilize Water (another of the Five Phases), preventing the dispersal of Water’s Qi (vital energy). Metal, Water, and Fire all originate from the same fundamental principle, much like the branches, flowers, and fruits of a tree all stem from its roots. In cultivation, one must grasp the essence (the Dao of Metal and Water) and avoid being misled by peripheral theories.

The scripture employs the imagery of winter’s withering to illustrate that cultivation must follow natural laws. At the winter solstice, when Yin energy is at its peak, merchants cease their activities, and practitioners must also refrain from speech, maintaining inward focus as if sealing a vessel with earth. The Dao of Heaven is vast and profound, beyond the reach of words, as boundless as the void itself. Misunderstanding these principles leads to failure in cultivation.

The author emphasizes the importance of comprehending the Four Symbols (Qian, Kun, Kan, Li, also representing Metal, Wood, Water, and Fire) to instruct future generations. The scripture mentions a figure named Xu Congshi, who originally composed the Can Tong Qi (The Seal of the Unity of the Three), later refined by Wei Boyang (who styled himself "Lord Wei") during his retreat into seclusion. Through studying the thoughts of the three sages—Fuxi, King Wen, and Confucius—in the Book of Changes (Yijing), Wei discovered their teachings were interconnected, all aiming to clarify the laws of aligning with nature and refining the spirit (Shen). Only by doing so can one harmonize body and mind, bringing peace to the world.

The unfathomable state of Yin-Yang transformation is called "Shen" (spirit). When Yin and Yang harmoniously intermingle, heaven and earth naturally become clear and bright. This principle can serve as an eternal law—governing affairs by following it brings order without confusion. After Wei Boyang (a key figure in Daoist alchemy) refined these teachings, later generations could practice accordingly.

Through inner cultivation of one's nature and emulating the natural Dao of the Yellow Emperor and Laozi, one returns to the original state of profound De (Virtue) and reverts to the root of life. The natural cultivation methods of the Yellow Emperor and Laozi embody the very source of the Dao. Just as undisturbed yellow earth exemplifies nature's stillness, the key to cultivation lies within one's own body. The so-called "my form" refers to the internal "metal" (Jin, alchemical term for original essence/Jing) within the human body, which never departs from oneself.

Holding fast to the root "One" leads to longevity. Here, "One" refers to water (alchemical term for original spirit/Shen). When metal and water unite, longevity is achieved—this is the meaning of the "mother's dwelling." One should abandon the five external minerals (mica, arsenopyrite, magnetite, sulfur, and realgar) from Mount Wudu, relying not on external substances, for the Neidan (internal elixir) will then form naturally. The truly precious substances are the three elements—metal, water, and fire (the essential triad of alchemy)—which together refine the Golden Elixir, treasured by the world. Though these three bear different names, they share a single origin, as discerning practitioners will realize through deep contemplation.

The Zhouyi Cantongqi (The Seal of the Unity of the Three) was not written to showcase ornate phrases but to clarify the true meaning of the Golden Elixir. Its principles shine like jade—stripped of superfluous words, the essential truth emerges. The text is concise yet profound, offering later cultivators a path to follow.

After attaining enlightenment, Wei Boyang withdrew to mountain forests, wandering freely between heaven and earth until he reached a state bordering the realm of spirits (the scholar Yu Fan noted the character "Wei" contains the radical for "ghost," hinting at this connection). Having ingested the Golden Elixir, his form and spirit transformed—seemingly passing away, he actually ascended, achieving immortality alongside his chickens and dogs (echoing the legend where "when one attains the Dao, even poultry and pets rise to heaven"). Across a hundred generations, his celestial presence still occasionally roams the human world.

This scripture primarily discusses the specifications for crafting the alchemical cauldron (for refining the Reverted Elixir), methods of fire regulation, and related cultivation principles.

Regarding cauldron specifications: The circumference of the belly should measure one chi five cun, with a mouth width of one cun one fen. The depth from mouth to base should be three cun two fen, with a rim width of two cun. The total height of the cauldron should be one chi two cun, with uniform thickness throughout. Three evenly spaced holes must be drilled on the outer belly to install iron legs, ensuring stability during alchemical operations. The cauldron must be suspended within the furnace without touching the ground.

Fire regulation methods: The cauldron contains water (Yin above) while fire burns beneath the furnace (Yang ascending below). For the initial seventy days and final thirty days, martial fire (intense heat) should be applied, while civil fire (gentle heat) is maintained for the intervening two hundred sixty days. The complete alchemical cycle spans three hundred sixty days—precisely one solar year.

Materials mentioned: Yin fire can refine the Yellow Sprout (essence extracted from lead), while cinnabar seals the cauldron mouth to prevent volatilization of the "metal-water" (alchemical materials). Mica and stalactite reinforce the cauldron's seal, allowing the water (metal-water) to circulate and transform securely within without leakage.

The term "auspicious person" refers to Daoist practitioners—those who cultivate according to this method may attain longevity. Just as trees wither during drought or flood, failure in alchemy results from imbalance between water and fire elements.

This passage explains the process and principles of refining the Reverted Elixir (a type of Waidan, or external alchemy in Daoist practice). The refinement of the elixir resembles water gradually congealing into solid ice, requiring a phased transformation from liquid to solid state, ultimately returning to its most essential form. The concept of "returning to the origin" refers to purifying metals into their most refined golden state, symbolizing the return to the source of the Dao.

Refining the Reverted Elixir demands an entire year of uninterrupted labor, ceaselessly day and night, an extremely arduous endeavor. Throughout this process, one must maintain rigorous vigilance without the slightest negligence. This path is both lengthy and profoundly mysterious, requiring a full year to complete, with transformations so unpredictable that they are truly unfathomable.

If one comprehends the principle of water and fire complementing each other (referring to the alchemical balance of Yin-Yang), they grasp the key to the creative transformations of heaven and earth. The Qian trigram represents metal, while the Kun trigram symbolizes water (an important correspondence in alchemical symbolism). Consuming just a grain-sized pellet of the elixir daily (called "pianzi," meaning small elixir pellets) can purify one's ethereal and corporeal souls.

Genuine Dao cultivators seek the fundamental origin of all things, which cannot be separated from basic elements like metal and water. One must meticulously study the relationships among the Five Phases (Metal, Wood, Water, Fire, Earth) and precisely measure their quantities (in ancient measurements, one jin equaled 384 zhu, corresponding to the 384 lines of the Zhouyi). These principles require quiet contemplation and need not be discussed with those who don't understand the Dao. Such mysteries should be deeply treasured within the heart and not lightly transmitted to others.

Upon achieving success in cultivation, one may ride white cranes and harness dragon scales, roaming freely through the Great Void (cosmic space), paying homage to immortal lords, receiving celestial registers, and becoming a true transcendent. This is the blessed reward attained through successful Dao cultivation.