《周易參同契發揮》Vol. 8

The ancient sages embraced profound truths (referring to the fundamental principles of Daoist cultivation) within their hearts while maintaining their innate purity. They remained unattached to external sensory stimuli, preserving mental tranquility—this embodies the cultivation realm of Guangchengzi (a legendary immortal of antiquity). To gather vital essence (Jing) and energy (Qi) with the gentle innocence of an infant—this represents the state pursued by Laozi.

As for the legends of Nüwa smelting five-colored stones to mend the heavens, or Ranzhuan mastering cosmic laws to achieve great deeds, these stories actually reflect the alchemical cultivation methods of Liezi (Lie Yukou) and Zhuangzi (the official of Qiyuan). Seekers of the Dao should not assume one must be born with immortal bones to cultivate—what matters is sincere dedication to practice. Sages and ordinary people share the same humanity; those who resolve to seek the Dao need only summon courageous determination, endure hardships, and practice diligently day and night. When the time ripens, success will follow naturally, just as boiling stones will eventually soften them or grinding an iron pestle can produce a needle.

The greatest pitfalls are these: some study the Dao yet never meet an enlightened teacher; others meet such a teacher but fail to receive genuine transmission; still others receive the transmission but lack perseverance. They expect results by evening after practicing in the morning, or seek immediate effects the moment they sit in meditation. It’s like trying to fill a great bell with a single spoonful of water, or facing winter’s harsh test before roots have taken hold. In such cases, even with Guangchengzi or Laozi as teachers and Liezi or Zhuangzi as companions, nothing can be done.

Ma Danyang wrote in the Golden Jade Collection: "Make breath regulation and energy refinement part of daily life, keeping the spirit (Shen) joyful. Frequently harmonize the Yin-Yang (symbolized by the dragon and tiger) within, never letting the restless mind (symbolized by the horse and monkey) run wild." He also said: "Observe the patterns of celestial movement, comprehending the communion of heaven and earth in stillness. Among the oral instructions passed down by masters, the practice of Wuwei (non-action) is most essential."

Ancient alchemical cultivators achieved a state where not a single thought arose, forgetting all distractions with a mind clear as still water, perfectly attuned to the Dao. In meditative stillness, they nurtured balanced Qi—breathing subtly and continuously, circulating energy from the crown (Muddy Pellet Palace) to the lower abdomen (Gate of Life), ensuring spirit and energy remained perpetually intertwined. When the internal elixir (Neidan) neared completion, primordial Qi naturally stabilized in the Dantian (energy center), co-governing the life force with heaven and earth. Legend says the Yellow Emperor secluded himself for three months in the Great Hall using precisely this method. This path of cultivation is profoundly...

Within the twelve two-hour periods of the day, the essential practice lies in continuously guiding Qi (vital energy) with focused awareness (referring to breath regulation techniques). When Qi harmonizes with Shen (spirit), the physical form achieves enduring existence—circulating ceaselessly like the sun and moon, flowing endlessly like the Milky Way. Through such perpetual motion, one's lifespan extends boundlessly. As the Zhi Xuan Pian states: "When every inhalation and exhalation mutually resonate, causing the body's Qi-blood to flow like divine nectar"—this precisely describes the principle.

If during exhalation the Shen cannot govern the breath, that cycle remains incomplete; similarly, if during inhalation the Shen fails to lead, that cycle too remains partial. The crux lies in maintaining constant interdependence between awareness and breath, ensuring uninterrupted fusion of Shen and Qi where every thought flows seamlessly into wholeness. Only thus can one attain the sublime state where form and spirit unite perfectly with the Great Dao. The Ling Yuan Da Dao Ge explains: "Shen constitutes our intrinsic nature, Qi our vital life-force; when Shen doesn't scatter outward, Qi naturally stabilizes." Likewise, the Xian Yao Ji notes: "When Qi and Shen intermingle, nature becomes tranquil and life secure—these two must never separate for even an instant."

Ordinary people fail to achieve this. Though Qi moves through their bodies with each breath, their Shen remains perpetually distracted by external matters. From youth through prime years into old age, their Shen never truly dwells within the physical form, causing spirit and energy to operate separately without coordination. Ultimately, this leads to a scenario where—like an empty house with crumbling walls—the master (Shen) cannot reside. Is this the heavens and earth killing them, or ghosts and deities harming them? Truly, it is their own deviation from the Dao that brings dissolution. As Shi Xizhen's Transmission of Zhongli and Lü Dongbin clarifies: "What we exhale is our primordial Qi emerging outward; what we inhale is the cosmic Zheng Qi entering inward. With firm foundations and undiminished primordial Qi, breathing still harvests heaven-earth's vital energy. But with unstable roots and depleted Jing-Qi, the upper body leaks primordial energy while the lower Dantian (the body's energy center) empties—inhaled cosmic Zheng Qi simply follows the exhaled breath away. Not only does internal Qi fail to accumulate, but heaven-earth reclaims it instead."

Thus immortals often advise: "Gathering the medicinal ingredients (Jing-Qi-Shen) for internal alchemy (Neidan) must be timely—once the cauldron (the body) deteriorates, restoration becomes difficult." When Su Zhe sought longevity methods from Immortal Zheng in his later years, she frankly told him: "Your bodily foundation is already damaged—achieving the Dao is now improbable." For the "medicinal materials" of cultivation (Jing, Qi, Shen) must be gathered in youth; those who practice in old age, when essence is depleted and the "lead-mercury" (alchemical terms for primordial Jing and Shen) runs dry, can at best use their efforts to maintain worldly comfort. As the Cui Xu Pian observes: "The true formula of Dao attainment lies within a few phrases, yet the results differ vastly between young and old practitioners."

The path of cultivation has its degrees of difficulty and ease, which illustrates this principle. Some say Lü Dongbin (Lü Chunyang) only began studying the Dao at fifty, while Ma Ziran and Liu Langran attained realization in their sixties. Why is this? It's like how a dilapidated house is easily repaired, but withered medicinal herbs struggle to revive. As long as one understands the method of returning to the origin (返本归元), accumulated merit becomes like mountains of gold and silver. The key lies in how one nurtures themselves in daily life.

"Refining the nine cauldrons" refers to cultivation through the ninefold firing process (the nine stages of alchemical practice). When this ninefold process is perfected, one can transform their physical form, soar through the skies, and wander freely between heaven and earth. As Lü Dongbin wrote in his "Song of the Kiln-Baked Clay": "Having passed through nine years of firing, suddenly the heavenly gate atop the head breaks open. The true person manifests with great spiritual powers, from then on celestial immortals come to congratulate"—this describes such a state.

The "three origins" in "containing Jing (essence) and nurturing Shen (spirit)" refer to the three Dantian (energy centers): upper (between the eyebrows), middle (in the chest), and lower (below the navel). Through prolonged nourishment of Jing, Qi (vital energy), and Shen, when the practice reaches maturity, the spirit turns inward while harmonious Qi (primordial energy) circulates throughout the body, penetrating all bones and orifices like the Milky Way flowing naturally. As the Precious Chapters of Primordial Chaos states: "After years of effortless application, the fire-wheel and water-axle revolve of themselves"—this describes such a condition. To nurture Shen means keeping the external form unstrained and the inner mind untroubled. For when Shen is overused it becomes exhausted, and when Jing is overtaxed it becomes depleted. Day after day of such dissipation leads ultimately to sharing the fate of grass and trees—is this not lamentable? Therefore, Dao cultivators must empty their minds, forget their forms, preserve their fundamental truth, and embrace their spiritual nature. Only thus can they solidify Jing, safeguard Qi, and fully concentrate Shen. When the three Dantian overflow with Jing and Qi, and the five viscera brim with primordial energy, only then can it be called the perfected elixir.

Tan Jingsheng writes in The Book of Transformations: Sadness produces tears, pungency brings nasal discharge, resentment forms goiters, and anger transforms into ulcers. Where the mind goes, Qi follows—there is nothing it cannot gestate. Plant wicked thoughts and evil fruits will grow; cultivate upright Qi and good rewards must come. Thus Dao practitioners must moderate sorrow and joy, abstain from anger, grasp the gateway of vast Qi (cosmic vital energy) to gather the root, and know the pouch of primordial Shen (original nature) to nurture illumination. Like clams containing pearls or fine jade preserving its glow through inward guarding, only thus can the precious Neidan (internal elixir) be achieved. These are truly words of ultimate wisdom.

When Jing and Qi fill the interstices (the spaces between skin and muscles), the sinews and bones become dense and firm. Reaching this stage in cultivation means the internal Jing and Qi have become so abundant they overflow, nourishing even the body's surface.

When cultivation reaches a certain level, all the blood in the body transforms into pure energy (known as "marrow essence"). The Cuixu Pian states that practitioners ultimately achieve a state of complete purity throughout their entire being. At this stage, the body no longer perceives the seasonal changes of cold and heat, for the greatest effect of cultivation lies in nourishing the brain and marrow.

The human brain is the sea where marrow converges (髓海, Suihai). When the brain marrow is abundant, pure Yang Qi (阳气) flows throughout the body. Once all the bone marrow is filled with this energy, the bones become solid, the sinews grow strong, and one becomes forever free from the disturbances of cold and heat. All pathogenic Qi (邪气, Xieqi) naturally dissipates, while upright Qi (正气, Zhengqi) permanently resides within.

The key to attaining longevity through cultivation lies in one's ability to "steal" (盗, Dao) the upright Qi of Heaven and Earth. The method of obtaining this Qi is through regulated breathing—exhalation must reach deep into the roots, while inhalation must penetrate to the very source (蔕, Di). Only then can the upright Qi of Heaven and Earth be gathered into the lower Dantian (丹田). Human respiration actually follows the same rhythm as the breathing of Heaven and Earth. The Huangji Jingshi Shu records: after the winter solstice, Heaven and Earth enter an exhalation phase; after the summer solstice, they enter an inhalation phase—this constitutes their annual respiratory cycle. Zhang Guanwu's commentary explains: after the winter solstice, Yang Qi increases while Yin Qi declines, and all things expand outward—hence exhalation; after the summer solstice, Yin Qi grows while Yang Qi diminishes, and all things contract inward—hence inhalation. On a daily scale, the period after midnight (子时, 23:00-1:00) corresponds to exhalation, while the period after noon (午时, 11:00-13:00) corresponds to inhalation.

From the perspective of Neidan (内丹) cultivation, a person breathes 13,500 times per day (one inhalation and exhalation counting as one breath). Each breath secretly draws upon the energy of Heaven and Earth's 13,500-year cycle. With 360,000 breaths per year, one accumulates the energy of 486,000 years of Heaven and Earth's operation. Through continuous practice, the turbid physical body is gradually replaced: first the Qi, then the blood, followed by the meridians, muscles, bone marrow, tendons, bones, and finally the hair—until the entire form is completely transformed. After nine years of completing nine such metamorphoses, one achieves a body of pure Yang, attaining longevity as enduring as Heaven and Earth itself. This is what Wei Boyang (魏公) described as the path of cultivation—expelling all pathogenic Qi and permanently retaining upright Qi through the continuous refinement of Yin Qi by the true fire (真火, Zhenhuo) day and night, ultimately realizing a body of pure Yang.

To attain longevity and immortality, the key lies in sustaining the true Qi (vital energy) within the body. The Cuixu Pian (Emerald Void Treatise) mentions that when cultivation reaches its peak, the practitioner's body emits golden light, the marrow exudes fragrance, and the sinews and bones become as pure as jade. When one can transform the red blood into white Jing (essence, the refined energy form) and eliminate all Yin energy (negative forces) from the body, health naturally follows.

This reveals the essence of cultivation: a body of pure Yang can achieve immortality, while a body of pure Yin becomes a ghost—ordinary people exist in a state of half-Yin and half-Yang. Only by cultivating Yang energy to eliminate Yin can one reach the state of pure Yang and become an immortal. Even a trace of remaining Yin energy means one has not yet attained true pure Yang. Only through persistent cultivation and accumulation can one ultimately undergo the transformation of "shedding the mortal body" (tuotai) and achieve immortality.

The path of alchemy (Neidan, internal alchemy) is truly vast! But to emulate the ceaseless movement of the heavenly Dao is no easy task. The Yinfu Jing (Scripture of the Hidden Talisman) states that observing the patterns of the Dao and aligning with them is sufficient. The reason heaven and earth endure is their perpetual, unceasing motion. If humans can reverse-engineer this celestial mechanism and make their own bodies operate day and night like heaven and earth, then the path to longevity lies within—there is no other way. The cycle of day and night is the natural rhythm of the Dao. For a human with a mere six-foot body to emulate this celestial operation and synchronize with heaven and earth—is this not the greatness of the cultivation path?

The Yijing (Book of Changes) declares, "Heaven moves with vigor; the noble person strives unceasingly." Confucius explains in the Xiangzhuan (Commentary on the Images) that this urges seekers of the Dao to emulate heaven's unwavering vigor. Heaven's ceaseless motion stems from its vigorous nature. If a noble person wishes to cultivate without pause, they must model their resolve after the Qian hexagram (symbolizing heaven's vigor). Yet to achieve true ceaselessness is profoundly difficult—how challenging it is for humans to mirror heaven's perpetual day-and-night operation!

However, all great undertakings begin small, and all difficult tasks start with simplicity. Towering trees grow from tender sprouts, nine-tiered platforms rise from piled earth, and thousand-mile journeys begin with a single step. Thus, sages approach difficulties through simplicity and tackle great matters through small steps—the key lies in daily accumulation. The Huangting Jing (Yellow Court Scripture) states that immortals and Daoist masters are not born with divine powers; they attain the true Dao through accumulated refinement. From the initial moments of "laying the foundation and forming the embryo" (early Neidan stages) to the manifestation of spiritual efficacy after a hundred days, all require unwavering, continuous cultivation.

The cultivation of the Golden Elixir (Jindan) path is akin to the ten-month gestation of pregnancy—it requires a complete cycle. Minor achievements may appear within a year, substantial accomplishments take three years, and full perfection demands nine years. Only when worldly affairs are entirely relinquished can one transcend the dust of mortality and ascend as an immortal. Never has success been achieved without prolonged accumulation. To claim instantaneous ascension without enduring effort is as absurd as expecting to dig a ninety-foot well with one shovel or leap onto a billion-foot city wall in a single step. How could such things be possible?

The Tongxuan Zhenjing (Scripture of Pervading Mystery) wisely states: A lame turtle, if it persists, can traverse a thousand miles; piled clods of earth will eventually form a mountain. Standing by the riverbank dreaming of catching fish is less productive than returning home to weave a net. Therefore, adepts of the Dao fear not failure, but lack of diligence; not lack of diligence, but lack of perseverance. This steadfast perseverance is the most challenging to cultivate. Wu Zongxuan’s Xuangang Lun (Treatise on the Mysterious Pivot) observes: Among ten thousand who comprehend the principles, only one in a hundred resolves to cultivate the Dao. Though many may resolve to cultivate, few concentrate on advancing with single-minded devotion. And among those who do, those who persist to the end are as rare as phoenix feathers. Thus, while seekers of the Dao are many, those who attain it are few.

If one truly comprehends the principles, they will resolve to act; with resolution, they transcend worldly concerns; transcending worldly concerns, they focus intently; with focused intent, they persevere—and thus, nothing remains unattainable. Sadly, as the world declines and drifts further from the age of sages, practitioners often pursue the tranquil path with restless, competitive hearts. Seeking quick results, they achieve the opposite; expecting immediate effects, they reap setbacks. Their resolve is weak, their faith insincere—diligent in the morning but slack by evening, zealous at first but abandoning the path midway. Craving instant gratification yet unable to endure, they still fantasize about matching the longevity of heaven and earth. Is this not the height of folly?

The Neiguan Jing (Scripture of Inner Observation) elucidates perfectly: Understanding the Dao is easy, but genuine belief is hard; belief is easy, but practice is harder; practice is easy, but attainment is harder still; attainment is easy, but maintaining the Dao is hardest of all. Were cultivation so simple, immortals would crowd the streets—what rarity would remain? Lü Dongbin’s verse says:

"Three acres of Dantian lie fallow, unsown;

To plant the seed requires the Crimson Dragon’s plow.

I’ve taught this method for others to try,

Yet without tilling, the Dao will not grow."

Is it the Dao that distances itself from humanity? Clearly, it is people who distance themselves from the Dao!

Some read the Wuzhen Pian (Awakening to Reality) line—"The blazing Golden Elixir is completed in a single day"—and take it as literal truth, scoffing at the notion of nine or three years of cultivation as mere procrastination. They utterly miss Zhang Ziyang’s profound meaning: that "single day" refers to the moment of sudden awakening, which is preceded by years of accumulated practice. Just as harvesting crops happens in an instant, the labor of sowing and nurturing spans all four seasons.

This passage cites the teachings of numerous Daoist adepts to illustrate that while the cultivation of the Golden Elixir (Jindan, the core achievement of Daoist Neidan practice) may yield subtle effects within a single day, it fundamentally requires long-term accumulation. Masters like Han Xiaoyao point out that although practitioners might experience miraculous sensations during cultivation—such as chilling bones or the visualization of a crimson lotus blossoming in the heart as the Golden Elixir forms—these momentary phenomena don't signify instant immortality. The true path of the Golden Elixir still demands adherence to the "celestial cycle fire times" (Zhou Tian Huohou, referring to the complete orbital circulation of Jing and Qi in Neidan practice) and requires the metaphorical "ten-month gestation period" (symbolizing the incubation process of internal alchemy) to achieve the "sacred embryo" (a refined state of being).

The text presents testimonies from Tang dynasty immortals: Wang Yixuan emphasizes "nine transformations require a year's work," Han Xiaoyao states that only after "ten full months" can one achieve harmony with heaven and earth, while Lü Dongbin (the Pure Yang adept) describes the "thousand-day effort" needed to circulate the "river chariot" (a Neidan term for the microcosmic orbit along the Governing and Conception vessels). Liu Haichan similarly confirms that "ninefold refinement" demands a thousand days. Other adepts like Chen Chaoyuan, Wang Liangqi, and Xue Zixian all corroborate cultivation cycles ranging from three to nine years. These realized immortals unanimously stress that while initial practice may bring swift experiences, attaining the ultimate state of pure Yang perfection requires prolonged tempering through disciplined fire regulation.

The cultivation of Neidan (internal alchemy) resembles the ten-month gestation of pregnancy—it cannot be achieved in a short time. As Liu Xugu taught, perfecting Embryonic Breathing (an advanced breathing technique) requires three years of dedicated practice. Chen Momo similarly emphasized that regulating Qi (vital energy) demands a hundred days to lay the foundation, but true mastery calls for three years of rigorous effort. Li Changyuan stated plainly: never imagine the Golden Elixir can be perfected overnight—it demands years of perseverance. Chen Cuixu offered a vivid analogy: though momentary practice may yield glimpses of progress, genuine maturity requires over three years; only after a thousand days of precisely timed "firing process" (the critical phases of cultivation) will the "true mercury" (symbolizing the refined Jing-essence) stabilize.

These masters spoke not to deceive but to warn. Qiu Chuji's Pianxi Collection states plainly: even those with scant blessings or numerous obstacles will succeed if they persist diligently. Yet today, many fail to grasp this—some cling rigidly to literal interpretations of texts, while others chase methods indiscriminately. The ancients used metaphors like lead and mercury precisely to prevent later practitioners from fixating on surface meanings while neglecting the true work within their own bodies.

When sages composed texts and diagrams, their intent was to guide, yet they often concealed the pivotal insights. The result resembles officials refusing governance, farmers abandoning fields, or merchants discarding wares—earnest cultivators grow poorer in spirit despite their efforts. Distressed by this, I write to clarify essentials for discerning minds to contemplate. As the Thirty-Nine Chapters of Pointing to the Mystery teaches: reading ten thousand alchemical texts avails less than understanding the principle of "true lead and mercury" (the core of cultivation). The key lies in comprehending the essence beyond words, never forgetting that true practice resides within oneself.

This scripture passage discusses the background and essential teachings of the Zhouyi Cantongqi (The Kinship of the Three). Witnessing many practitioners obsess over Waidan (external alchemy) with metals and minerals, squandering wealth without results—some even abandoning official posts or neglecting farmland—Wei Boyang felt profound distress. Thus he composed the Cantongqi, concealing the true essence of cultivation within its seemingly fragmented three chapters, daring not to reveal celestial secrets directly. Those with genuine wisdom need only contemplate earnestly to grasp its profound mysteries.

The key to cultivation lies in emulating the cyclical patterns of heaven and earth. The grandest celestial phenomenon is the Milky Way (the "Mystic Channel"), spanning tens of thousands of miles across the sky. Remarkably, similar energetic pathways exist within the human body. Practitioners need not seek externally—turning inward reveals them. When internal Qi (symbolized by the Hegu star representing Yang energy) circulates to specific locations (the Xingji position corresponding to the earthly branch chou), intense reactions occur like thunderous tremors. This marks the critical moment for opening energy gateways. As described in the Cuixu Pian, at this stage the body's Yin and Yang energies resemble the sun (Golden Crow) and moon (Chang'e) racing through designated meridians to converge.

(Note: "Hegu" refers to Altair in Aquila, "Xingji" is one of the twelve celestial divisions corresponding to chou position, "Golden Crow" symbolizes Yang energy, and "Chang'e" represents Yin energy—all specialized Neidan terminology.)

This passage explains the principles of fire regulation (huohou) and energy circulation in Neidan (internal alchemy) practice.

"The River Drum approaching the Star Chronogram" metaphorically describes the state of energy movement within the body during cultivation. When the genuine Yang Qi activates within, it resembles sudden storms sweeping through mountains and rivers—a phenomenon that would startle ordinary people. This natural imagery symbolizes the intense energetic transformations occurring during practice.

"Sun-dial shadows" represent the precise regulation of fire phases in cultivation, while "nine years" actually refers to the cyclical process of refining the Golden Elixir (Jindan). Authentic practice doesn't literally require nine years; this process can be condensed into one month or even a single two-hour period. The slightest miscalculation in advancing or retreating during these fire phases may lead to failure, as perilous as an overturned carriage. Thus practitioners must exercise utmost caution.

The text mentions three crucial bodily centers: the upper Dantian (Mud Ball Palace) houses the "Celestial Emperor," the middle Dantian (Scarlet Palace) hosts the "Elixir Sovereign," and the lower Dantian (Yellow Court) contains the "Primordial Monarch." During practice, one must direct the fire of Shen (spirit-consciousness) into the lower Dantian to activate its genuine Yang Qi, causing it to ascend and unite with the true Yin Qi in the middle Dantian.

The "pivotal hinge" symbolizes the body's energetic pivot points, which like celestial poles have hierarchical distinctions. Practitioners must harmonize the energies between upper and lower Dantian until reaching the state where "one breath completes a celestial cycle." The final analogy of rivers returning to the ocean illustrates how internal energies should flow continuously toward the Dantian—this "great sea"—during cultivation.

The reason the great sea never dries up is because it connects with the apertures (natural passages) of famous mountains and rivers, allowing an endless circulation of water flow. The human body operates similarly—when genuine Qi flows unobstructed within, the fluids of the eight meridians all reverse course and gather in the Ocean of Origin (Dantian).

Heaven and Earth resemble a pair of female and male (Yin-Yang), cycling between the Zi hour (midnight) and Wu hour (noon). The Wu hour marks the zenith of Heaven, while the Zi hour marks the nadir of Earth—these two periods are critical moments when Yin and Yang intersect, and Water and Fire meet. When the sun and moon reach these positions, they appear to pause momentarily. This is why people refer to the sun at its zenith as "halting at noon." In Neidan practice, the ascent and descent of genuine Qi similarly exhibits this lingering at Zi and Wu hours, perfectly mirroring the cyclical patterns of Heaven and Earth.

The Yin hour (3-5 AM) and Shen hour (3-5 PM) are the wellsprings of Yin and Yang, where all things begin to grow or withdraw. When the handle of the Big Dipper points to the Yin position, spring arrives—Yang Qi begins to stir, and all things sprout. When it points to the Shen position, autumn comes—Yin Qi turns austere, and all things contract. Thus, these two hours serve as the gateway through which Yin and Yang emerge and all things enter or exit. In Neidan cultivation, genuine Qi arises at Yin hour and withdraws at Shen hour, cycling endlessly in complete harmony with the movements of Heaven and Earth.

The "Records of the Grand Historian: Treatise on the Celestial Offices" states that among the seven stars of the Big Dipper, the handle connects to the Horn Star (Alpha Draconis), while the bowl rests against the Three Stars (Orion's Belt). At dusk, one observes the handle; at midnight, the pivot (fifth star); at dawn, the bowl. The Dipper functions like the celestial emperor's chariot, moving through the sky's center to govern the four directions, demarcate Yin-Yang, establish the four seasons, regulate the Five Phases, and fix the solar terms. Daoists hold that the celestial pivot (Qi movement during practice) in the human body also begins at Zi hour, circulating through the twelve two-hour periods. Just as the Dipper resides at heaven's center and the heart at the body's core, Heaven uses the Dipper as its hinge, while humans use the heart. In alchemical practice, regulating the "fire times" (breath control) with the heart mirrors how Heaven employs the Dipper to cycle through the twelve periods. The Cuixu Pian states: To comprehend the mysteries of celestial mechanics, observe at midnight how the Dipper's handle moves—for whom does that single dewdrop (the refined essence of cultivation) ultimately condense?

This passage describes the phenomena and principles of Neidan (internal alchemy) practice in Daoism. During the alchemical process, the medicinal ingredients (referring to the essential substances of Jing (essence), Qi (vital energy), and Shen (spirit) required for cultivation) are placed within the cauldron (symbolizing the human body) for refinement. Kunlun Mountain (represented as the "Zeng Mountain") here metaphorically refers to the Niwan Palace at the crown of the head. The White Tiger (symbolizing the metal Qi of the lungs) leads in front, while the Azure Dragon (symbolizing the wood Qi of the liver) follows behind, moving in harmonious coordination like a married couple.

When practicing late into the night, the internal Qi circulates with the roaring sounds of dragons and tigers. At this moment, one must seize the opportunity to turn the River Chariot (referring to the ascent of true Qi along the Governing Vessel). Soon the Qi will reach the Niwan Palace at the crown, as pure as white snow being cooked in a jade furnace.

The Vermilion Bird (symbolizing the heart fire) dances above the cauldron, displaying radiant colors. When captured by the net (referring to the constraints during practice), it cries like an infant longing for its mother. Eventually, the Vermilion Bird folds its wings and settles in the cauldron (indicating the heart fire being subdued). This process mirrors what the Chilong Great Elixir Formula describes: though the Vermilion Bird naturally loves to soar high, it is caught by the toad (symbolizing kidney water). Though called the Charming Maiden (referring to the heart-mind), its cries resemble those of an infant.

Before half the practice time has elapsed, the true Qi already manifests like dragon scales, with its colorful radiance shifting unpredictably. The medicinal substances within the cauldron boil and surge like overlapping waves or interlocking dog's teeth. Their forms alternate between resembling the ice of harsh winter and hanging stalactites, with various wondrous visions piling up and supporting each other. These descriptions capture the extraordinary sensations and phenomena produced during the circulation of true Qi within the body.

This scripture describes the phenomena of fire regulation and Yin-Yang interaction during Daoist Neidan (internal alchemy) practice. During cultivation, the vital Qi (energy) in the Dantian (the lower abdominal energy center) churns like boiling water, while the Niwan Palace (a key acupoint at the crown of the head) becomes fiery with generated wind. The three Dantians (upper, middle, and lower energy centers) fill with Qi, resembling steam penetrating a rice steamer or water boiling vigorously in a cauldron.

When Qi circulates, it forms jagged patterns resembling winter icicles or layered stalactites. Through the rhythmic "drawing and adding" of breath regulation, the Qi gradually condenses, ultimately nurturing the "Yellow Sprout" (symbolizing the initial formation of the internal elixir), which naturally forms the elixir sprout and regenerates essence. As the Cuixu Pian states, after ten months of diligent cultivation, one gradually gathers Qi and condenses it into the elixir. If practitioners devote themselves to internal refinement day and night without slackening, they will witness these phenomena at each stage of progress.

When Yin and Yang energies are properly harmonized, they naturally maintain equilibrium. The Wuzhen Pian mentions that Yin and Yang resonate through their shared nature, joining as effortlessly as sixteen ounces form a pound. Maintaining continuous, elongated breathing allows Yin and Yang to match spontaneously; keeping the heart-mind empty, still, and focused enables them to naturally abide together.

Celestial imagery illustrates the practice: the Azure Dragon (Qinglong) constellation resides six degrees within the Fang constellation, corresponding to the springtime east and the Mao position; the White Tiger (Baihu) constellation lies seven degrees within the Mao constellation, corresponding to autumn's west and the You position; the Vermilion Bird (Zhuque) constellation occupies two degrees within the Zhang constellation, aligning with the southern Wu position at high noon. Their convergence resembles a family reunion—fundamentally the interplay of Yin and Yang substances—ultimately forming the unified state of "Three-Five" (the triad of Heaven-Earth-Human and the Five Phases). Just as among the twenty-eight lunar mansions, the Fang constellation of the eastern Azure Dragon's seven mansions resides in the Great Fire stellar lodge (associated with spring's Mao position), while the Mao constellation of the western White Tiger's seven mansions belongs to the Great Beam lodge (associated with autumn's You position), both representing pivotal nodes of natural celestial-terrestrial energy convergence.

This scripture discusses the correspondence between ancient celestial phenomena and alchemical practices. It first mentions that the Vermilion Bird (one of the southern constellations) is positioned at the second degree of the Zhang constellation, precisely corresponding to the southern noon position. The Zhang constellation spans eighteen degrees in total, with particular emphasis on the second degree because the celestial sphere's 365 degrees are bisected between the Xu and Wei constellations in the north. The initial degree of Wei constellation directly opposes the second degree of Zhang constellation in the south.

The text then explains how the vital energies (Qi) of the Azure Dragon, White Tiger, and Vermilion Bird—representing the three directions—all converge at the position of the Black Tortoise (northern quadrant). Specifically, the sixth degree of the Fang constellation and the seventh degree of the Mao constellation correspond to the perfected numbers of Water and Fire (six being Water's perfected number, seven being Fire's perfected number). Meanwhile, the second degree of Zhang and the first degree of Wei correspond to the generative numbers of Fire and Water (two as Fire's generative number, one as Water's generative number), forming an intimate relationship akin to family members.

The foundation of alchemy ultimately lies in just these two elements—Water and Fire. When they circulate within the cauldron, they manifest as the "three-fives" numerical pattern (Fang's six, Mao's seven, Zhang's two). When these three harmonize and return to the first degree of Wei, they coalesce into the "infant" (referring to the elixir). To refine the Great Elixir, one must follow this method by applying fire (heating) at the initial emergence of Yang energy, with its profound transformations originating from the positions of the Xu and Wei constellations.