《銅符鐵券》

According to the Liexian Zhuan (Biographies of Immortals), there lived in Qufu a man named Lan Gong who devoted himself to practicing filial piety with such sincerity that he moved the celestial immortals. A zhenren (Perfected Being) who called himself the "King of Filial Devotion" descended from the Northern Dipper constellation to Lan's home, bestowing upon him the Golden Elixir Treasure Scripture and bronze talismans with iron covenants (Daoist ritual implements), instructing him to transmit these to Lady Chen of Huangtang in Danyang, who would in turn pass them to Zhenjun Xu Xun (one of Daoism's Four Great Celestial Masters).

The scripture we see today meticulously records the medicinal ingredients and firing times (critical cultivation periods) required for cultivating the Three Primordials (Jing/essence, Qi/vital energy, and Shen/spirit). Its complete content suggests it constitutes the original treasure scripture transmitted in antiquity. As for the bronze talismans and iron covenants, their contents appear not to have been included here. Having extensively collected various fulu (Daoist ritual talismans and registers) and numinous texts, I compiled them casually into a volume with the intention of systematic editing. However, as this text has been transmitted through generations, I dared not make arbitrary revisions that might disrupt the original form of this immortal scripture.

This book retains its traditional title Bronze Talismans and Iron Covenants, while the collected talismans and numinous texts are separately compiled as reference materials. Unlike most elixir scriptures that discuss only theory, this work directly reveals authentic cultivation methods without concealment. Those who genuinely comprehend its essence may immediately achieve the divine elixir upon grasping its secrets. Yet how easily can such cultivation secrets be explained? Among ten practitioners, nine may attain through intuitive understanding; five may comprehend through oral transmission; but scarcely anyone masters the truth through written words alone.

In compiling this work—though it resembles seeking secrets on paper—if future readers might thereby grasp the truth (like catching fish or rabbits with nets and snares, metaphorically achieving goals through tools), then this book will have served its purpose as a bridge. This colophon was written in mid-summer of the Jihai year by "Hermit of One Valley."

This passage records the core content of the important Daoist scripture Tongfu Tiequan (Bronze Talisman Iron Covenant), detailing the process by which the Nine Heavens Mother Yuanjun (a high-ranking Daoist goddess) transmitted alchemical secrets to Immortal Xu.

The opening describes the supreme authority of the Jade Pure celestial realm (the highest of Daoism's Three Pure Realms), noting that Mother Yuanjun of the Nine Heavens received a mandate from the Jade Pure Celestial Worthy to oversee the Southern Immortal Bureau (the Daoist administrative body for celestial beings) and guide sentient beings toward salvation. Terms like "vermilion writings" and "radiant solar essence" refer to esoteric Daoist talismans (fulu) and cultivation methods.

The central section meticulously documents alchemical essentials: the elixir refinement must traverse three great kalpas (cosmic cycles in Daoist cosmology) named "Dragon Han" and "Extended Peace," presided over jointly by the Emperor of Eastern Florescence (chief of male immortals) and the Queen Mother of the West (chief of female immortals). It particularly emphasizes the transformation process of lead and mercury (fundamental alchemical materials) - mercury must first transform into lead, then lead into earth, before finally refining into the Golden Elixir within a "white gold crucible." This process requires precise mastery over the cyclical movements of "solar soul and lunar essence" (the yin and yang aspects of qi), with the "five-colored true lead" only attainable when "the solar soul approaches the fullness of the sun spirit" (the peak moment of yang energy).

The scripture repeatedly stresses the preciousness of these alchemical secrets, stating that without obtaining "metallic qi of the west" (gengjin), one cannot produce the true elixir. It mandates the collection of "refined metal essence" (xinjin) to be repeatedly purified in ash ponds. The concluding reference to "mercury accumulating nine times nine before reverting to cinnabar" indicates the eighty-one days of firing required to complete the Golden Elixir, secretly corresponding to the harmonious interaction of "Azure Dragon of the East and White Tiger of the West" in yin-yang cosmology.

Throughout the text, metaphorical alchemical terminology abounds, using the external alchemy (waidan) refinement process as an allegory for the essential transformations of essence (jing), qi, and spirit (shen) in internal alchemy (neidan) cultivation.

This scripture primarily expounds on Daoist cultivation methods involving incantations, talismans (fulu), and the Golden Elixir (jindan) practice, divided into two sections: The Bronze Talisman Iron Covenant and The Pagoda Instructions.

The Bronze Talisman Iron Covenant section describes how ancient enlightened rulers attained golden-tendoned, jade-boned immortal bodies through filial piety cultivation. It mentions subduing demons with mantras, talismans (fulu), and ritual water while benefiting beings through both visible and hidden virtuous deeds. The iron covenant (a ritual implement) and bronze talismans require oral transmission; accomplished adepts may establish merits in the Jade Purity Realm (one of the Three Pure Ones' domains). The text vividly portrays cultivation phenomena: light radiating between eyebrows, serene smiles, illuminating the netherworld with luminous pearls, and capturing the jade rabbit (symbolizing lunar essence) on sacred mountains.

The cultivation method involves "cooking millet" (a Neidan term for refining essence-jing) to nourish spirit-shen and qi while observing celestial cycles. It warns of the perils of failing to subdue malignant dragons or purify toxic qi—plunging practitioners into seas of blood and cities of bones. The crucible furnace must refine and extract heaven-earth essences, emphasizing this as the most exalted among myriad methods. Using twelve divine talismans and "nine-cycle white snow" (a Neidan term), practitioners achieve the Azure Heaven state through three circulations and five transformations (alchemical cycles).

Upon ingesting the elixir, the body's nine orifices glow; swallowing divine talismans sprouts wings and summons auspicious clouds beneath one's feet. Deepening practice opens the three yang (jing, qi, shen) like withered grass reviving in spring. At consummation, entire families ascend to heaven, greeted by the Five Sacred Mountains with celestial edicts. This section stresses the transmission of cosmic secrets through ages, revealed by perfected beings to King Wu and others. It distinguishes this Golden Elixir method from ordinary breathwork, saliva techniques, sexual practices, or mineral alchemy (waidan), presenting it as the supreme path of uniting primordial spirit (yuanshen) with physical form.

The Pagoda Instructions section concisely explains: ancient alchemical pagodas had nine tiers, now simplified to seven or five, each six inches tall. The base must hold a "Peng-hu" vessel and yin-yang medicinal agents, with each tier having vents for dragon-tiger qi (yin-yang energies) to circulate. The entire apparatus hangs from an iron ring on a celestial beam for stability before alchemical operations commence.

This passage describes the specific operational methods for fire regulation and lead ore refinement in ancient Daoist alchemy (Waidan).

When practicing alchemy, the Peng-hu crucible (alchemical furnace) must be elevated on an iron stand, surrounded by fire but kept at an appropriate distance to prevent direct flame contact. The furnace base requires three sturdy legs, each about half an inch high, to ensure even and potent heat distribution. The ancient method of using bellows for air supply proved highly effective, while later practitioners invented adjustable air vents that reduced manual labor in fire control. When the fire becomes too intense, close the vents; when insufficient, reopen them—the key lies in flexible adjustment according to actual conditions. Constant furnace inspection is necessary to prevent emergencies, as none of these details can be neglected. Though requiring a hundred days of effort, this forms the foundation for successful elixir preparation.

Regarding the method for refining true lead: First crush several hundred jin of lead ore into powder, then mix each jin with four liang of salt, pounding the mixture ten thousand times. Wrap it tightly in multiple layers of paper, encase it in salt-clay about five to six fen thick, and sun-dry before placing it in a specialized furnace. This furnace resembles a large ancient steamer (zeng), six to seven chi tall with a diameter of one zhang, equipped with bellows at the base. Lay one chi of charcoal first, then alternate layers of lead-pellet mixture until full. When the furnace glows red inside and out, cease firing. Upon cooling, the lead will congeal into lumps resembling native silver ore. This product is called "Qian-fu" (Dry Father), a crucial alchemical ingredient.

The text emphasizes that the true elixir actually requires only the essence of lead (lead-jing, Qian-jing). Obtaining this treasure means achieving more than half the success. This refined lead is termed "the primordial water of true unity" (Xiantian Zhenyi zhi Shui), the fundamental material for cultivation. Finally, it mentions the great alchemical methods transmitted by ancient sages Fuxi and Huangdi, referencing various specifications of elixir cauldrons (nine cauldrons, seven cauldrons, etc.), all being essential vessels for refining divine elixirs.

This scripture elucidates the method of crafting the "Bronze Talisman and Iron Scroll" in Daoist alchemy, focusing on refining metallic essences through precise formulations to produce the elixir.

The alchemical cauldron must be operated according to strict ritual measurements and proportions. For instance, eight taels of "white gold" (a Daoist alchemical term referring to mercury or specially treated silver) should be paired with thirty-six catties of "subdued qi black lead" (lead that has undergone repeated refinement). The text notes that seventy-two taels of lead correspond to nine refinement cycles, expressing concern that insufficient lead essence would compromise the elixir's quality. The proportion of half a catty to eight taels (in the ancient system where one catty equals sixteen taels) is crucial, with nine taels of lead to one tael of white gold being the optimal ratio.

Additional "flowing pearls" (an alternate name for mercury) should be prepared as backup in case the cauldron leaks qi. The process begins by extracting the "earth soul" (referring to white gold/mercury), followed by obtaining the "heavenly spirit" (referring to gold). Gold originates from cinnabar ore, symbolizing solar essence, while white gold derives from mercury, representing lunar essence. Their union generates the complete essence of heaven and earth—a profound method attributed to the Daoist patriarch Lord Laozi (Laojun).

True numinous substances reside in the north (associated with the Water phase in Daoist cosmology, governing storage), serving as the "elixir head" (foundational material). While worldly gold possesses pure properties, it struggles to absorb spiritual qi; copper and tin are overly harsh and damage the elixir's form. Only white gold perfectly harmonizes with the elixir, producing golden patterns and pearl-like radiance during refinement—a manifestation of true yin and yang (fundamental cosmic energies in Daoism) merging.

By precisely calculating celestial cycles (an ancient calendrical concept), yang qi naturally arises in the central yellow region of the Five Phases (corresponding to Earth). Abundant earth qi nourishes metal nature, cultivating the "thunder dragon" (a coded term for the elixir) with the aid of the "water tiger" (a metaphor for lead). The refined elixir emits multicolored auroras, growing more potent with each cycle.

The text further explains the principle of yin pools and yang cauldrons: since lead is difficult to refine, dual containers stabilize its properties. The yang cauldron causes essences to ascend, while the yin pool precipitates impurities. The first nine refinements focus on lead transformation, the latter nine on nurturing the "mother elixir" (base substance). The application of ren and gui qi (Water-phase heavenly stems) is critical—aged lead transforms into yin earth, with the secret of lead usage lying in distinguishing the prenatal (cosmic origin) from the postnatal (material world).

Finally, the elixir resembles an infant requiring a wet nurse (auxiliary materials in refinement). Through the "mysterious pass" (a vital aperture in neidan or the body), true elixir emerges as "true mercury" (pure yang qi), while the "golden mother" (elixir matrix) generates diverse medicinal effects. A minute quantity yields immense efficacy—this crimson-phoenix elixir can save the world and pacify the people, yet remains inaccessible to those lacking sufficient virtue (De).

This scripture details specific operational methods in Daoist alchemy, primarily consisting of two components: the secrets of furnace construction and the esoteric method of the Nine Earthly Pools.

Regarding furnace construction: The alchemical chamber must first enshrine deities including the Nine Heavens Five Earth Controllers (deities governing the five directions of heaven and earth) and the Seven Primordial Lords of the Northern Dipper (stellar deities of the Big Dipper), with proper incense offerings prepared. The furnace's air vent should be egg-sized—too wide would weaken the airflow, preventing true Qi from ascending. The furnace base must form a tripod structure (never iron, but ceramic-fired clay), arranged in a triangular formation reinforced with salt-clay. Above the furnace, construct a multi-tiered structure suspended by iron rings from ceiling beams, with internal fireproofing measures and dedicated flue channels for precise heat regulation.

The esoteric method of the Nine Earthly Pools focuses on the first pool for refining lead. Use one jin (approx. 500g) of pure, snow-white lead divided into sixteen plates. Choose auspicious timings: when "sun and moon clasp like jade" (simultaneous solar/lunar radiance), "five planets string pearls" (planetary alignment), or during Shen/You days (days with strong Metal-phase energy in the Five Phases system). The procedure involves: first refining half-jin of lead with gentle fire to form a solid base; when the pool glows red, add nine jin of specially treated pure lead precisely divided into 3,385 portions—each with strictly regulated weight.

The text employs specialized alchemical terminology: "Black Tiger" (symbolizing lead), "Golden Lord" (representing lead or mercury), "River Chariot" (the circulation of true Qi), and "Purple Qi" (auspicious energy). The entire process demands absolute concentration from the alchemist—no distraction permitted—while carefully observing color transformations during lead refinement (such as the appearance of five-colored radiance as an omen).

This passage describes the specific process of "refining lead" in Daoist Waidan (external alchemy) – a technique for pursuing longevity through mineral-based elixirs – with particular attention to fire control and timing.

The process requires eighty-one jin of lead, corresponding to the Daoist cosmological cycle of "nine times nine revolutions." Lead sheets are placed in a crucible and melted with martial fire (intense flame) until completely liquefied. The mixture must be refined until black impurities disappear and white substances emerge, at which point one observes the liquid churning with flickering red light and rising purple Qi (vital energy). Additional lead is then added until metallic luster resembling scattered stars appears, followed by golden crystalline formations.

Fire regulation is crucial: excessive heat prevents the "golden crow" (symbolizing the sun) from ascending, while insufficient heat risks damaging the "jade rabbit" (symbolizing the moon). When the interaction of water and fire reaches sufficient cycles, the lead undergoes qualitative transformation. The refined essence (Ren-water) within the lead naturally rises to condense at the top, forming what's called the "shining sun's flowing pearl" elixir.

After completion, the fire must be withdrawn and the furnace sealed, with three qian and four fen of lead added to stabilize the medicinal properties. Once completely cooled, the condensed substance – called "azure dust" – should be preserved in gold or magnetic containers.

The second crucible follows identical procedures but requires a new furnace. The text emphasizes collaborative work among two or three practitioners taking shifts to monitor the fire in the "Purple Sun Palace" (a poetic name for the alchemical workplace). The fundamental principle lies in balancing the generative relationships between black and white, red and black, harmonizing the essences of heaven and earth.

During refinement, phenomena like "Yu's Gate triple waves" (describing liquid turbulence) and "pearls rolling in the hall" (elixir crystallization) may appear, requiring regulation through Xun-wind (southeastern wind). The ultimate goal is extracting lead's essential Qi through precise fire control until golden pearls with reddish-yellow hues emerge for immediate sealing. After draining the crucible's turbid residues, what remains is the precious elixir essence (yellow lightness).

This passage describes the fire regulation method for refining lead in the "Bronze Talisman Iron Register's" third cauldron, a secret transmission technique in Neidan (internal alchemy) practice. It primarily explains the control of firing temperatures and operational procedures during the alchemical process of lead-mercury amalgamation.

When the "Holy Mother" (referring to the mother liquid in the alchemical furnace) shows signs of depletion during refinement, it must be promptly replenished. First apply alternating civil and martial fires (civil fire being gentle heating, martial fire being intense heating), then add eight ounces of aqueous lead (a specialized lead preparation) to stabilize the furnace foundation. When the lead has half-dried, introduce the Holy Mother and melt it with strong fire into a clear golden solution. At this stage, the "Vermilion Bird" (southern fire symbol) omen will appear—quickly add small lead pellets, but avoid haste.

The scripture employs the metaphor of "an infant separating from its mother" to describe the state of material separation during alchemy, emphasizing gradual lead addition. Just as a black turtle emerging from the sea must guard against wind and waves, fire regulation must be carefully controlled during refinement. Lead quantities and firing temperatures must be precisely synchronized until frost-like crystals appear on the alchemical platform with the mother liquid settling separately.

During operation, regulate the fire (represented by the celestial stems bing and ding) to incorporate the lead in batches. When all lead has been added and the solution becomes perfectly clear, extinguish the fire and seal the furnace. The final product—two qian and three fen of "gold-stabilizing lead" (an alchemical product)—after overnight cooling in the chilled furnace, yields "flowing pearls" (elixir crystals) atop the crucible, called "yellow lightness."

The subsequent text reveals the fundamental principle lies in lead-mercury interaction, with lead containing primordial qi (vital energy). Through mediation by the "Yellow Matron" (an intermediary agent), lead absorbs mercury essence like an ox-cart transporting goods, undergoing repeated floating and sinking refinement. Successful alchemy manifests the wondrous sign of "white cranes filling the sky," yet requires fire control as precise as lightning strikes. It ultimately emphasizes mastering the "four gates open, two passes closed" technique—ensuring free flow of lead qi while maintaining the golden cauldron's (furnace) airtight seal—through formless, quality-less fire refinement to obtain the "golden fluid" elixir.

The third cauldron's specific procedure resembles the first two: mount the prepared alchemical cauldron on a tripod, keeping the lid perfectly sealed. Replenish any depletion promptly, place it in the foundation cauldron, and activate intense fire with large bellows. After "three civil three martial" fire adjustments, the "yellow sprout" (initial elixir formation) develops. Black lead undergoes repeated ascension and descent for purification with ample, stable firing. Throughout the process, lead emerges from nothingness while white gold (the elixir) is lost and regained—each lead addition requires timely precision. Ultimately, the "Azure Dragon and White Tiger" (Yin-Yang energies) must cycle through mutual transformation. When sufficient lead has been added, cease firing and open the furnace to obtain the true fire elixir glowing like crimson clouds, completing the alchemical process.

This passage describes the refining methods for the fourth and fifth pools in the Daoist alchemical practice of the "Bronze Talisman and Iron Covenant."

For the fourth pool, one uses 1.2 qian of "peace-gold lead" (an alchemical material). The first three pools employ the method of "eldest son forming images" (a specific firing state) and "receiving the tally from Zhen-Geng" (a particular refining technique), totaling 7 qian of peace-gold lead, corresponding to the seven-day celestial cycle. This method isn't used for the remaining six pools. After completion, the fire must be withdrawn for cooling, and the "ren-water" (a specific state of water) is extracted from the cauldron, called "golden liquid." After marking it, one proceeds to prepare a new pool.

The incantation for the fourth pool describes the sun's movement and lunar phases, mentioning the name "crimson mist." The firing process follows the same intensity as the first three pools, requiring stable maintenance of the "sacred embryo" (the nascent elixir). When reaching the "mother entering the pool" stage, the fire must be intensified. The process requires three cycles of opening and closing to produce "true lead" (purified alchemical material). The refinement emphasizes balancing yin-yang and harmonizing metal-water interactions, ultimately manifesting five-colored crimson light in a dazzling spectacle.

The fifth pool's incantation explains the properties of "black lead" and "white gold" (both alchemical materials)—black lead representing celestial essence and white gold representing terrestrial fluid—their mutual generation and restriction. During refinement, yin and yang must merge into primordial chaos until golden blossoms bloom. When the "treasure moon" (the elixir) fills the dantian (energy center), intense firing must reach its peak without excessive sealing.

This passage elucidates the "Bronze Talisman and Iron Covenant" practice within Daoist alchemical traditions, specifically detailing the firing techniques for the sixth and seventh refining pools.

In the sixth pool's lead refinement, the crux lies in mastering fire modulation. The alchemist must repeatedly purify the lead within the cauldron, mirroring the natural process of a mother bearing six children. Throughout this operation, one must maintain vigorous furnace flames (the "crimson furnace phenomenon") to facilitate the ascent of the elixir's Jing (essence) and Qi (vital energy). Particular attention must be paid to controlling the Xun wind (an alchemical term denoting regulated airflow for heat adjustment) until the metal achieves complete liquefaction and translucency. The text references the dynamic interplay between Ren water and Gui water (Daoist alchemical terms representing Yin-Yang elements), emphasizing the rejection of turbid elements while preserving the essential. When firing reaches perfection, the elixir manifests the celestial valley's azure hue (the ideal chromatic indication) - a refinement method scarcely witnessed in the mundane world.

The seventh pool's lead refinement follows similar principles as the sixth, yet emphasizes greater adaptability. Practitioners need not rigidly adhere to conventional methods; after two or three pools' refinement, the subtleties become self-evident. Should the elixir's coagulation prove insufficient, one must reapply fire until yellow clouds (the elixir's essential Qi) appear within the cauldron, signaling the Yin pole's transformation into Yang with crimson radiance. At this stage, the elixir descends like dew droplets into the Yellow Court (Dantian), manifesting the infant imagery (symbolizing the elixir's maturation). The lead mass should maintain thumb-sized proportions with uniform surfaces, and must achieve "satiety" (full medicinal absorption) before furnace proximity. Upon completion, the Ren water essence collected from the cauldron's upper layer - termed "Ren blossom" - should be preserved for subsequent pool refinement.

These descriptions allegorically encode Neidan (internal alchemy) processes, where lead and mercury symbolize human Jing and Qi, firing techniques represent breath regulation, all culminating in the forging of the Golden Elixir within.

This passage elucidates the refinement process of "lead and mercury" (symbolic terms for human essence, qi, and spirit) in Daoist Neidan (internal alchemy) practice. The practitioner must extract true yang ("silver's inner essence") from lead, akin to drawing pure lotus from turbid waters. The phrase "mother and child gazing at each other" refers to the harmonious interplay of yin and yang qi, while "yellow and white devouring each other" represents the alchemical state of metal (gold) and wood merging.

During cultivation, one must skillfully regulate the "fire times" (with "martial fire" denoting intense practice). When crimson light envelops the body and the precious moon appears, it signals the optimal moment to ingest the "lead pearl" (replenishing primordial qi). When lead and mercury (essence and qi) within the body achieve complete purity, mystical states emerge: "yin giving birth to yang behind lead" and "yang producing within lead." These manifest as visions like "purple powder dancing in the pond" (qi transformation in the Dantian) and "auspicious light kindling in the flames" (signs of true qi circulation).

The text emphasizes that authentic cultivation hinges on two fundamental substances: lead essence (primordial qi) and white gold (primordial essence). Metal (original essence) forms the foundation of water (original qi), which itself serves as the pivot of the Great Dao. When true lead (primordial qi) becomes depleted, practitioners must gather "ren water" (primordial true water) in the "cold furnace" (lower Dantian) through a process called "ren blossoms."

Later passages reveal that the "eight treasures" (various bodily essences) all originate from black lead (primordial unified qi). Those who comprehend heaven-earth mysteries can achieve "six yin transforming into sacred form" (pure yin converting to yang) and "withered bones returning from the yellow springs" (rejuvenation). Cultivation follows principles of hardness-softness, exterior-interior, and natural yin-yang balance—the "cauldron" (upper Dantian) contains heaven-earth, as does the "pool" (lower Dantian). Upon reaching the "jade-white terrace" (purified body-mind), one becomes spiritually vibrant like a mother in her seventh or eighth month of pregnancy.

The conclusion underscores that this "bone-insertion method" (profound cultivation technique) requires authentic transmission from a master. Without karmic affinity across lifetimes, genuine attainment remains elusive. Practitioners lacking true guidance may exhaust themselves with "heaven-piercing fire effort" (arduous training), yet fail to retain the "green brittleness" (volatile essence), rendering their efforts futile.

This passage explains the concrete procedures and principles of Daoist alchemy, focusing specifically on the preparation methods for two elixirs: "Purple-Gold Sulfur" and "Marvelous Numinous Cinnabar."

For refining Purple-Gold Sulfur, the process must be conducted in the eighth alchemical crucible. The procedure involves replacing old equipment with new vessels, using nine pounds of lead and eight ounces of foundational materials, following the established method. The crucial point lies in mastering the rising and falling variations of the fire intensity—excessive lead will cause the elixir to dissipate, while insufficient amounts will hinder its formation. When golden flower-like substances (golden blossoms) appear, the process must be halted. At this stage, impurities (ren-gui) must be separated from the lead to purify the metal. The true essence of alchemy lies in extracting the Qi (vital energy) of lead rather than its physical form, much like capturing only the spiritual resonance when the sun and moon exchange radiance.

The refinement of Marvelous Numinous Cinnabar takes place in the ninth crucible. Here, the essences of black and white substances (likely referring to lead and mercury) merge to form a dense elixir. The process requires precise coordination between the "infant" (lead) and the "maiden" (mercury), harmonized through the "Central Yellow" (earth element). While the fire control resembles previous stages, special attention must be paid to applying the numerical principle of "Nine Yang." Success is achieved when the elixir manifests a red luminous glow resembling a precious moon.

The entire refining process from the first to the ninth crucible embodies the Neidan (internal alchemy) practice of "transforming Jing (essence) into Qi." Each crucible's "ren-water" (an alchemical term denoting a specific material state) must be individually sealed for later use. The final Marvelous Numinous Cinnabar should appear as snow-white flakes—any bluish-yellow tint indicates impure lead elixir.

These methods exemplify the Daoist alchemical philosophy of "seizing creation from heaven and earth," emphasizing how ordinary metals can be transmuted into miraculous elixirs through specific procedures and fire regulation. Terms like "infant and maiden" and "Central Yellow" represent symbolic expressions commonly used in Daoist internal alchemy.

This passage explains the first two crucible techniques of the "Nine Human Crucibles" secret method in Daoist alchemy. The first crucible involves mixing Xinjin (a specialized alchemical metal) with Qing'ai (a mineral substance), sealing them in a specially crafted Yin-Yang cauldron, and calcining them with precisely controlled heat. The process requires seven days of gentle heat, followed by fourteen days of moderate heat, and concluding with twenty-five days of intense firing. Upon completion, the mixture produces crimson-hued vapors and purple powdered Xinjin—though this initial elixir remains rudimentary, requiring further refinement.

The second crucible describes combining the resulting Qinggong (a mercury-based preparation) from the first stage with Liuzhu (another alchemical substance), then repeating the heating process. After thirty-six double-hours of alternating "civil and martial fires" (a balance of gentle and fierce heat), the mixture forms an egg-yolk-like elixir. The "bronze tally token" mentioned here refers to a secret alchemical credential, while "lead and mercury" denote fundamental materials in the process.

The text emphasizes unwavering concentration and meticulous heat regulation during refinement. Terms like the "Uncrossed Furnace" and "Bright Furnace" refer to specialized alchemical apparatuses, and "civil and martial fires" describes the alternating intensity of flame control. The entire procedure must strictly adhere to ritual protocols, with the elixir undergoing a transformation from chaotic formlessness to tangible substance, ultimately possessing the miraculous power of "reviving the soul and mending bones"—a metaphor for its life-restoring properties.

This passage discusses the secret method of "Bronze Talisman and Iron Covenant" in Daoist alchemy, primarily describing the alchemical process from the Three Cauldrons to the Four Cauldrons stage.

In the Three Cauldrons stage, the alchemical process requires three steps: First, using martial fire (intense heat) to decompose the medicinal ingredients, thereby positioning the Three Powers (Heaven, Earth, and Humanity). Next, transforming the azure mercury (quicksilver) from its ashen, ethereal state into one imbued with Shen (spirit) and Qi (vital energy). Finally, nurturing the Yellow Sprout (embryonic form of the elixir) to gradually mature, refining pure True Lead (essential alchemical material). The specific method involves combining three qian of azure mercury with one liang of Bright Cinnabar, then calcining it with Bing Fire (yang fire) for three days until the material's Qi is exhausted and its form turns yellow. At this stage, one qian of cinnabar can transform one liang of mercury, while one qian of mercury can transmute ten liang of copper—demonstrating the miraculous potency of the elixir.

The Four Cauldrons stage is more complex, requiring the blending of the Golden Liquid refined from the previous three cauldrons with three jin of Crimson Mist Lead-Mercury from four pools, then nurturing the mixture with precisely controlled heat for twenty-five days. During the process, the alchemist must observe the natural principle of "young father and aged son," regulating the "advancing fire and retreating talisman" to allow the elixir to grow within the Purple Mansion and Jade Pond (Dantian). The final product can invigorate one's Shen (spirit) and even withstand frost.

The text emphasizes that alchemy must strictly follow the methods recorded in the "Bronze Talisman and Iron Covenant," with "one qian of dead mercury transforming ten liang of copper" being the crucial secret. The perfected elixir is not only a supreme treasure but also capable of aiding the world and saving lives, bringing immeasurable blessings. The entire process operates in cyclical perpetuity, embodying the Daoist cultivation philosophy of "the Dao models itself after nature."

(Note: The terms "martial fire" refers to intense heat, "civil fire" to gentle heat, "Yellow Sprout" to the embryonic form of the elixir, and "True Lead" to the essential substance in alchemy—all being specialized terminology in Daoist alchemy.)

This passage discusses the esoteric "Bronze Talisman Iron Register" method in Daoist alchemy, focusing specifically on the Five-Cauldron and Six-Cauldron techniques. In ancient Daoism, this practice was known as Waidan (external alchemy) - the art of creating elixirs of immortality using mineral substances.

The Five-Cauldron method involves combining sulfur and mercury in precise proportions. The procedure specifies: take one portion of sulfur with one tael of processed mercury (dry mercury), where one qian of mercury can transform ten taels of iron. The text particularly emphasizes the need for cautious handling. During the alchemical process, careful fire regulation is crucial - when the mercury turns red like colored glaze and lead surfaces lose their luster, the practitioner must perform the "extract lead, replenish mercury" step, a core technique traditionally passed secretly between masters and disciples. Upon completing the full alchemical cycle, one obtains the protection of the "Bronze Talisman Register."

The Six-Cauldron method proves more complex, requiring the combination of "flowing gold" produced from the previous five cauldrons with new materials, totaling three jin of raw matter for refinement. Special caution is needed when using "martial fire" (intense flame) to prevent the loss of medicinal properties. The alchemical cauldron must be tightly sealed to allow the "true father and true mother" (referring to Yin and Yang Qi) to naturally unite within. The resulting substance turns red when exposed to fire and can transform metals like iron and tin.

The repeatedly mentioned "Bronze Talisman Register" serves as crucial credentials in Daoist alchemy, symbolizing authentic transmission from ancestral masters. The process emphasizes "celestial talisman fire regulation," meaning one must follow natural rhythms when controlling the fire. These alchemical methods embody Daoist philosophical principles of "Yin-Yang mutual generation" and "Five Phases transformation," maintaining that material transmutation can be achieved through specific techniques.

This scripture describes the essential techniques of "Seven Cauldrons," "Eight Cauldrons," and "Nine Cauldrons" in Daoist alchemical practice. It primarily explains the process of transforming various metallic minerals into elixirs through precise material ratios and controlled firing techniques.

During the Seven Cauldrons stage, the Golden Crow (metal symbolizing the sun) must be combined with Lunar Cold (substance representing the moon) to form a complete Taiji (Supreme Ultimate) circulatory system. The alchemical process requires strict sealing, allowing interactions between various elemental forces (represented by Bagua/ Eight Trigrams positions like Qian, Xun, and Gen). When the Seven Yang cycles (seven revolutions of solar energy) are completed, the elixir manifests wondrous effects. The specific method involves mixing one jin of gold with six materials, sealing them in the cauldron for gentle nurturing, and transforming toxic substances like arsenic through controlled heating.

The Eight Cauldrons stage depicts the elixir achieving moon-like purity, resembling an old oyster nurturing its pearl. At this phase, true mercury (liquid metal) and true lead (solid metal) must be refined at noon in precise proportions (one jin weight). Upon completing eight Yang cycles, the elixir displays miraculous red-and-green hues. The practical operation combines pre-processed gold with seven materials, adding substances like purple-gold sulfur, with carefully regulated firing to induce marvelous transformations.

The Nine Cauldrons stage represents the supreme alchemical process, symbolizing return to primordial origin. After ten months (representing a complete cycle) of refinement, the elixir completes its "ninefold return to authenticity." At this stage, substances like cinnabar and mercury undergo qualitative transformation, elevating from mundane materials to sacred substances. The method involves mixing gold processed from previous stages with eight materials, incorporating numinous cinnabar, and nurturing according to established principles. The final elixir possesses extraordinary potency, though the scripture emphasizes guarding this secret closely.

These contents reflect characteristic features of Waidan (external alchemy), where complex material combinations and strict firing control aim to achieve material sublimation and transmutation. Each stage corresponds to specific Yin-Yang cycles (Seven Yang, Eight Yang, etc.), embodying the Daoist understanding and application of cosmic operational principles.

This passage discusses the advanced stages of Daoist alchemical practice. The "golden bamboo shoots and yellow sprouts" (precious substances produced during the alchemical process) emerge through specific nurturing methods, undergoing three transformative stages. Just as ordinary tiles can naturally become treasures, the practitioner's "sacred embryo" (the energy body formed through Neidan/internal alchemy) is nourished by nine cycles of Yang Qi until all Yin energy transforms into pure Yang, enabling complete spiritual rebirth.

At higher levels of cultivation, the internal elixir manifests a crystalline clarity—transparent as quartz yet radiant like the rising sun. The "divine water" (refined essence) brims with vitality, emitting iridescent auroras and extraordinary fragrances, displaying characteristics akin to ruby glass and crimson amber. This results from the "seven returns and nine restorations" (repeated refinement process) where Qi is transmuted into Shen (spirit), ultimately forging the supreme Golden Elixir.

Before ingestion, the elixir must be suspended in a well for seven days to neutralize its fiery toxicity. On an auspicious day at dawn, one faces east to ingest it with pure water—one pellet daily for a hundred days completes the spiritual metamorphosis, unifying Shen and Qi while consolidating the ethereal souls. After three years, all nine orifices of the body emit luminous light, marking the elixir's ultimate completion.

The scripture details preservation methods: seal the elixir in a magnetic case, nourished externally with "Ren water" (celestial stem-associated water). It advises seeking like-minded adepts to establish alchemy chambers in sacred mountains, following methods recorded in the Divine Elixir Secret Manual. This esoteric tradition originated with Lady Chen of the Eastern Jin Dynasty, transmitted to Xu Xun (the True Lord Xu), then to Wu Meng and Xie Tingsheng, becoming a vital Daoist lineage.

The core of alchemy lies in "refining lead-gold" (the crucial lead-mercury process), requiring mastery of celestial secrets and the Nine Heavens' essential principles. Precise ratios of metal and earth materials must be calibrated while controlling the "fire phases" (regulated by the Li trigram's symbolism), ensuring mutual generation of metal and water with clear separation of pure and turbid. The key lies in oral formulas that subdue the body's dual Yin-Yang energies (tiger representing Yin, dragon Yang), allowing comprehension of cosmic creation and manifestation of solar-lunar radiance.

This scripture primarily elucidates the essential techniques of water and fire application in alchemical practices. Regarding the "Bronze Talisman and Iron Covenant" method of alchemy, one must first prepare various ritual implements at the altar, placing basins and vessels on both sides. Assistants should be carefully selected—only upright and gentle-natured individuals qualify. Before constructing the sacred chamber and golden cauldron for alchemy, reliable companions must first be secured.

During the alchemical process, practitioners must adhere to the natural principle of "the dragon and tiger bowing to each other, the tortoise and snake lying in concealment" (where dragon and tiger represent the Yin and Yang energies [Yin-Yang], while tortoise and snake symbolize the harmonious interaction of water and fire). Operations must strictly follow the esoteric liturgical procedures (Keyi) of the Daoist tradition, maintaining unwavering sincerity throughout. The scripture mentions there's no need to deliberately pursue the celestial sun (golden crow) or moon (jade rabbit)—once the "True Earth of Floating Li" (referring to the essential substance required for alchemy) is refined, the desired precious elixir can be obtained.

Concerning specific methods of water and fire application: alchemy requires the "True Fire of Five Convergences" (representing pure Yang fire). One need not insist on using a burning mirror to obtain fire; instead, a red-gold mirror may be used to gather solar fire at high noon. For water collection, between the hours of Hai to Zi (9 PM to 1 AM) during the Mid-Autumn Festival's full moon, a square pearl (an instrument symbolizing lunar essence) should be employed to receive the pure Yin water condensed from moonlight. The text emphasizes that if practitioners lack sufficient virtue (De), even during correct temporal alignments they will fail to gather adequate true water. Water and fire must remain balanced during alchemy—ten jin of water are required daily, totaling over 2,500 jin annually—highlighting the precision and rigor of the alchemical process.

Finally, the text cautions adepts: these celestial secrets must never be carelessly disclosed to unworthy individuals, lest calamity ensue. The entire passage embodies Daoist alchemy's profound grasp of natural laws and its emphasis on moral cultivation.

Regarding the use of water, employing ordinary water would not constitute true cultivation practice—such misguided methods would lead Dao-seekers astray, effectively cutting off their spiritual path. Let me reveal a simple method: True water is none other than the lunar essence's yin energy (Yinjing of Yuehua), the purest aqueous element between heaven and earth known as the Divine Water of Heavenly Unity (Tianyi Shenshui). This sacred water manifests during the fourth lunar month when yang energy peaks (the Month of Pure Yang), coinciding with the season of divine dragon transformations when rainwater becomes spiritually potent. Collect heavy rainfall in porcelain vessels, seal them to prevent dust contamination, and store enough for a year's use. Remember—no month passes completely without rain. This embodies the adaptive wisdom of realized adepts; why rigidly adhere to fixed methods?

For selecting cultivation sites, one must seek renowned spiritual mountains and blessed lands. The topography should feature protective barriers in front with mountain backing behind, oriented north-to-south (Zishan Wuxiang alignment) to accommodate the sun (Golden Crow) and moon (Jade Rabbit)'s celestial paths. Surroundings should include graceful waterways, elegant bamboo groves, with dragon veins (earthly Qi currents) layered like folding screens. The White Tiger (western) quadrant requires multiple mountain guardians, the Black Tortoise (northern) side needs faint screen-like ridges, while the Vermilion Bird (southern) direction maintains open expanses. Avoid worldly clamor and secular associations. Ideal sites reveal rare birds and beasts, house precious scriptures, and grow spiritual herbs and lingzhi mushrooms—such locations naturally attract immortal visitations and earth deity protection.

Construction specifications for elixir chambers: Each crucible requires its own room—three crucibles demand three chambers. Structures should stand sixteen chi high (approx. 5m) and fourteen chi wide (4.5m), with hollowed corners and encircling corridors. Eschew ornate towers—install operable windows on all sides with roof vents for airflow. Floors must be perfectly level without depressions, all gaps sealed against malign influences. Crucible placement must accord with cosmic patterns: solar/lunar/stellar movements, seasonal nodes, and celestial mechanics. Position the main door due south, locating kitchens, latrines and baths at appropriate distances. Maintain solemn dignity throughout, as if serving sovereigns and sages.

Altar construction method: Select premium yellow earth from auspicious directions (Wangfang), steam-process and compact it into platforms using skilled artisans, allowing natural drying. Build altars with steadfast majesty, embodying devotional reverence for cultivation.

This ritual altar (the sacred space for Daoist ceremonies) must be constructed in three tiers, corresponding to the Three Powers (San Cai) of Heaven, Earth, and Humanity in Daoist cosmology. The lower tier stands 1.2 chi (feet) high, designed as an octagon with a circumference of 2 zhang 8 chi (28 feet) and a diameter of 9 chi 3 cun (9.3 feet). It features eight gates—each 8 cun (inches) high and 3 cun wide—constructed as operable earthen doors. From each gate, a path leads to the altar's center, where a 5-cun diameter ventilation shaft allows the passage of wind and fire.

The middle tier, also 1.2 chi high, has a circumference of 2 zhang 4 chi (24 feet) and a diameter of 8 chi 6 cun (8.6 feet), maintaining the octagonal form. Its surface bears the Bagua (Eight Trigrams) arranged according to the Five Phases (Water-1, Fire-2, Wood-3, Metal-4, Earth-5). The upper tier, again 1.2 chi high, centers on a 5-cun void and adopts a circular shape symbolizing Heaven, with a circumference of 1 zhang 6 chi (16 feet) and a diameter of 5 chi 3 cun (5.3 feet). Here, the patterns of the Twenty-Eight Lunar Mansions and Seventy-Two Seasonal Nodes from ancient astronomy are inscribed.

Atop the altar stands the Supreme Unity Divine Furnace (Taiyi Shenlu), a pivotal ritual implement. The furnace body measures 1.6 chi tall, with walls and base 6 cun thick, enclosing an interior space of 7 cun diameter. Its three legs each rise 4 cun, and the complete structure—from base to lid—reaches 2 chi in height, with a central 5-cun channel connecting to the altar's core. A 3-cun thick, 6-cun diameter fire chamber (likely a fuel container) divides the furnace vertically, half exposed and half concealed within the altar. The altar surface further depicts the Four Celestial Emblems (Azure Dragon, White Tiger, Vermilion Bird, Black Tortoise) and Twelve Monthly Generals (temporal deities). The eaves display motifs of the sun and moon with their symbolic creatures (Golden Crow and Jade Rabbit) on the eastern and western sides.

The divine furnace must be crafted on an auspicious day (Huangdao Jiri) selected by astrological calculations. Pure yellow earth is meticulously washed, then steamed, sun-dried, and soaked before being mixed with paper pulp and pounded into shape. Additional materials include powdered white eel clay, fine sand, hematite, and magnetite. Construction begins only when four or seven of the Twenty-Eight Lunar Mansions align favorably. After air-drying in shade, the furnace undergoes firing before final installation on the altar.

Specifications for the Elixir Cauldron (Dingqi): The vessel stands 1.2 chi tall with an overall wall thickness of 1.1 cun and a rim thickness of 1 fen (0.1 cun), structured in three tiers. Its interior measures 1.6 cun in diameter with a 7-cun wide mouth, supported by three turtle-shaped legs. Construction method: While initial shaping uses clay, the final casting requires nine-times refined pure wrought iron for durability. Any cauldron with casting flaws or impurities must be discarded. The work commences only during rare celestial events—either the "Five Planets Align" (Wuxing Lianzhu) or "Sun-Moon Conjunction" (Riyue Hebi)—with multiple backups prepared for replacement.

This scripture primarily explains the methods and precautions for crafting the cauldron vessel (alchemical furnace) in Daoist alchemy, divided into three sections:

The construction of the Kan and Li cauldrons: Alchemical practice requires preparing two cauldrons (the Kan cauldron and Li cauldron) which must be forged from pure gold. The lower cauldron (Li cauldron) must hold water and has precise dimensional requirements: eight cun and four fen in height, fifteen cun in diameter, with edges one cun and two fen thick. The two cauldrons must nest together seamlessly. During fabrication, a wax mold must first be sculpted with extreme precision and smoothness. Only after the clay mold has completely dried and the wax removed can the molten gold be poured.

The method for constructing the protective enclosure (outer containment structure): This requires mixing fine soil from the five directions (east, south, west, north and center) with mulberry bark juice, pounding it into hard clay slabs shaped like cooking vessels. It should measure nine cun in height and nine fen in thickness, leaving a space of one cun and nine fen between the enclosure and cauldron. The earth must be gathered on earth days (Wuji days) and the structure built on fire days (Bingding days). Eight supporting pillars must be formed at the base for reinforcement—this structure is also called the alchemical stove, designed to contain and focus the energies of the Kan and Li cauldrons within a sealed space.

The casting of the divine chamber (core reaction vessel): This is the crucial element determining alchemical success. First create a wax model, then shape it using specially prepared "mysterious water" (specially treated water) and clay. The casting must occur on Geng days (the third day of each lunar month), using previously refined "golden mother" (purified metal) as material. One jin of pure gold will reduce to fifteen liang after casting due to the dissipation of Jing (essence) during the process. After casting, the vessel must be nourished with "ren water" (specially treated water), changed monthly for one hundred days to restore the metal's spiritual properties, before finally being sealed with "six-one mud" (a sealing compound of six mineral ingredients).

Note: References like "gathering soil from five directions" or "constructing on fire days" reflect the Daoist alchemical tradition of selecting auspicious dates and times. Terms like "mysterious female" (Xuanpin) and "supreme ultimate" (Taiji) represent core Daoist concepts denoting states of yin-yang interaction. "Six-one mud" was a common sealing material in ancient alchemy, prepared from six minerals including halite and bittern salt.

This scripture describes the technical details of Daoist alchemical equipment preparation and ritual arrangements, divided into two main sections:

The first part details the fabrication of alchemical vessels. A mixture of gypsum, dried alum, calcined ochre, yellow lead oxide, and red halloysite must be ground into fine powder to seal container joints. Silver wires should form a cross-shaped reinforcement, with multiple layers of sacred gold and sacred silver wrapping to ensure absolute airtightness. The vessel should adopt an egg-shaped form—four inches tall according to Zhou dynasty measurements—with a round exterior and square interior, symbolizing the containment of heaven and earth's essences. Construction must commence on an "earth day" (auspicious date determined by the calendar).

The second section outlines the laboratory arrangement protocol. Eight bronze mirrors (each twelve inches in diameter) should hang in the eight directions, with ritual swords suspended at the four corners of the furnace. These sacred implements must be installed at the third mark of the jihai day (specific astrological hour) under reverent supervision by designated attendants. Normally wrapped in yellow silk, they should be enshrined before the altar with morning and evening offerings. Only when Saturn governs an auspicious day (lingguan diwang date) may they be properly positioned in the alchemical chamber. The furnace base requires five-colored earth molded into the shapes of the Five Sacred Mountains, left to dry before sealing all furnace joints.

All construction—whether establishing the laboratory, building the altar, or positioning the furnace—must occur during "earth prosperity" auspicious days. Three primordial mirrors (Heaven-Illuminating Mirror, Earth-Illuminating Mirror, and Human-Illuminating Mirror) should hang to dispel malign influences, with swords planted at the corners to suppress ghosts. The Heaven-Illuminating Mirror must be cast on a jiazi day, the Earth-Illuminating Mirror at high noon on a renzi day, and the Human-Illuminating Mirror at midday on a bingzi day—each twenty-four inches in diameter. Ideally, swords should be forged on the Frost Descent solar term, with ancient blades being most preferable. Various talismans (Taiyi Talisman, Four Directions Talisman, Twelve Celestial Stem Talismans, etc.) and five-colored banners must also be prepared according to precise specifications.

The laboratory must enshrine the "Perfected Being of Cosmic Marvelous Transformation" and the "Perfected Being of Nine Yang's Majestic Virtue for Delivering Life and Transcending Death" (Daoist deities), with strictly regulated arrangements. All mentioned implements—their casting times, dimensions, and materials—follow Daoist cosmological principles of Yin-Yang, the Five Phases, and the celestial stems and earthly branches system.

This scripture details the specific protocols and taboos for Daoist alchemical rituals. First, it describes the need to make offerings to multiple deities, including the Lunar Deity (Taiyin Xingjun), Water Virtue Star Lord (Shuide Xingjun, water god), Celestial Lord Zhao (Zhao Tianjun, guardian deity) and other celestial beings, along with past immortal masters and local earth gods. The alchemy chamber requires specialized equipment: a bronze brazier placed in the northeast corner to control the fire, using well-burned charcoal to prevent sudden flares; a water basin in the southwest corner with eight ladles, accompanied by two water vessels labeled "used" and "unused." Each alchemical station must have two attendants specifically managing fire and water, using bronze hourglasses for timing.

When arranging the alchemical workspace, practitioners must calculate auspicious positions according to the "Eight Gates and Hidden Jia" (Bamen Dunjia, a Daoist directional numerology system). For instance, when the Nine Heavens align with the Zhen position (east), one should hang talismans (fulu) and mirrors on the eastern wall with colored ribbons beneath; when in the Xun position (southeast), southeast-facing talismans should be displayed. The central area requires yellow decorations hung on propitious days when Celestial Virtue (Tiande) and Lunar Virtue (Yuede) align. All talismans must be placed on days when the twenty-eight lunar mansions form favorable combinations (specifically the "four-seven conjunction"), with formal announcements made to deities like the Primordial Lord (Yuanjun) as witnesses.

Pre-alchemical purification is essential: abstaining from sexual activity, prohibiting killing, performing good deeds, and maintaining dietary and bathing purity. Ancestral altars and incense tables must be established to seek divine protection, with the process ideally beginning during the winter solstice month when yang energy first reemerges. Strict taboos forbid the presence of Buddhist monks/nuns, women, chickens, or dogs to avoid contamination. Daily supervision by "true companions" (zhenyou) ensures discipline, with assigned roles for gatekeeping, timekeeping, finances, provisions, fire/water management, and incense duties—all performed while practicing the ritual Pace of the Dipper (bugang). Participants must cut their hair, break a tooth, and swear blood oaths before thunder department deities, pledging communal cultivation with the shared aspiration of achieving the Dao and ascending to the celestial realms upon success.

The fundamental transformations between Heaven and Earth arise from the interaction of Yin and Yang energies. The movement of Yang Qi and the fusion of Yin Qi both originate from the Qian (Heaven) and Kun (Earth) hexagrams. In the Yijing (Book of Changes), Qian uses "nine" to represent its Yang lines, while Kun uses "six" for its Yin lines.

The Qian hexagram consists of six Yang lines (each denoted as "nine"), with each line representing nine counting rods, totaling fifty-four rods. The Kun hexagram has six Yin lines (each denoted as "six"), with each line representing six rods, totaling thirty-six rods. When doubled according to seasonal changes, this yields the Yijing's calculation of 216 rods for Qian and 144 rods for Kun, combining to 360 rods that correspond precisely to the days of a year. This demonstrates the fundamental principles of Yin-Yang waxing and waning, the growth of all things, and lunar phase changes.

Daoist practitioners condense the annual cycle into months, months into days, and days into time periods. Each two-hour watch (shichen) corresponds to two solar terms among the twenty-four and six pentads among the seventy-two. From the midnight-to-noon watches (zi to si), we observe the Yang-growth phase from winter solstice to summer solstice; from noon-to-midnight watches (wu to hai), we see the Yin-growth phase from summer solstice to winter solstice. During Golden Elixir (Jindan) cultivation, practitioners regulate the Yang fire (advancing fire) and Yin tally (retreating tally) across these twelve watches. Through seasonal temperature variations, they draw Heaven-Earth energies into the Dantian (central palace and divine chamber), facilitating the mutual transformation of true Qi to nurture essential Jing.

Each day-night cycle follows two hexagrams' movements, totaling 720 hexagrams annually with 4,320 lines - symbolizing a 4,320-year climatic cycle. Thus within each watch, proper fire regulation can concentrate 4,320 years of Heaven-Earth's upright Qi within the alchemical cauldron. The measurement of fire phases uses the four hexagrams (Qian, Kun, Kan, Li) as framework, with the remaining sixty hexagrams' line images for practical application. The 360 lines correspond to 360 days, with each line representing one "star" (measurement unit), equivalent to one zhu (ancient weight unit).

The zi watch employs thirty-six zhu of Yang fire. With twenty-four zhu making one liang, the remaining twelve zhu constitute half a liang - thus the zi watch yields one and a half liang of Yang fire. The six Yang watches (zi to si) collectively produce nine liang (216 zhu) of Yang fire, while the six Yin watches (wu to hai) employ Yin tally to produce 144 zhu (six liang, the number of old Yin). Beginning at the wu watch, each line reduces by one zhu during Yin tally retreat, with six Yin watches yielding six liang. This completes the cultivation principle of Yang's nine and Yin's six.

This passage reveals the esoteric principles of fire regulation in Daoist alchemy. When refining the elixir, the 360 yao lines (basic units of the Yi Jing hexagrams) correspond to one jin of weight, yet only fifteen liang of fire regulation are actually used (traditionally one jin equals sixteen liang). The remaining one liang represents the Qian and Kun trigrams as the cauldron (alchemical vessel), while the Kan and Li trigrams serve as the medicinal ingredients (alchemical materials).

The cultivation of the Great Elixir requires strict adherence to the secret fire-regulation methods transmitted by enlightened masters. The relationship between fire and medicine resembles that between parent and child, necessitating oral transmission and heart-mind realization. Fire regulation must precisely follow celestial patterns: the twelve two-hour periods of a day correspond to the twelve months of a year, with seven and a half days forming one seasonal node cycle. The fifteen liang of fire regulation align with the moon's fullest energy - exceeding this by even one liang disrupts the Yin-Yang equilibrium.

Regarding "bathing" (an alchemical term denoting fire-regulation intervals), the standard elixir-refining cycle spans ten months, with intentional pauses during the second and eighth months. During the second "Rabbit Moon" when Yang qi peaks, one must moderate Wood and Fire phases to nourish Metal and Water. Conversely, in the eighth "Rooster Moon" when Yin qi dominates, Metal and Water phases should be tempered to strengthen the fire and nurture the elixir.

Throughout the entire process, meticulous fire regulation is essential. After one hundred days, golden liquid forms within the cauldron, manifesting five auspicious signs: lamp-flower patterns, cloud formations, and others. At this stage, one may report to the deities and ingest the pellet. Continuous ingestion for another hundred days consolidates Jing (essence) and Qi (vital energy), prolonging lifespan. Finally, after ten months of gentle nurturing, the formless elixir crystallizes into mysterious pearl-like grains (the Golden Elixir) resembling millet seeds - this constitutes the true spiritual medicine.

This passage describes the practice of "Bronze Talisman and Iron Covenant" (a Daoist cultivation method) to attain immortality. Practitioners must devote consistent effort over time—three years to refine the "Divine Elixir" (an advanced stage of Neidan/internal alchemy), nine years to obtain "White Snow" (referring to pure Yang Qi within the body), and twelve years to master the "Twelve Divine Talismans" (protective incantations).

At profound levels of attainment, even ordinary tiles can be transformed into gold, and withered bones may regain human form. Both body and spirit reach wondrous states, endowed with various supernatural abilities. Like fruit ripening naturally, the adept may freely roam the Great Purity (Taiqing), one of Daoism's highest celestial realms.

The text concludes by urging practitioners to treasure these three precious scripture scrolls, emphasizing that the teachings have been thoroughly expounded. The author hints at their imminent return to the Jade Capital (Yuqing, the abode of Daoist immortals)—a subtle reminder for cultivators to diligently study the texts and persist in their practice.