《黃帝九鼎神丹經訣》Vol. 7

According to ancient legends, the Yellow Emperor received secret alchemical techniques from the Mysterious Maiden of the Nine Heavens (a Daoist goddess) and sought instruction on the "Way of True Unity" from the Celestial Sovereign Perfected Being (an ancient immortal). The ancients particularly valued these two methods of attaining longevity: refining the Golden Elixir could render the physical body incorruptible, while cultivating "True Unity" (the purest primordial Qi within the human body) could ward off evil influences.

Scriptures record that texts containing the methods for nine-cycle Golden Elixir refinement and the secrets of guarding the One were all treasured in the Five Cities of Mount Kunlun (a Daoist celestial realm). Stored in jade caskets and inscribed on golden slips, they bore seals of purple ganoderma and the Central Talisman imprint—all were precious treasures secretly transmitted by ancient sages and immortals.

Human mortality primarily stems from six causes: depletion of primordial Qi, natural aging, disease invasion, toxin damage, evil Qi infiltration, and exposure to wind-cold pathogens. To avoid these calamities, one may practice Daoyin exercises, breathing techniques, essence consolidation for brain nourishment, dietary moderation, regulated daily routines—supplemented by herbal ingestion, deity visualization, True Unity cultivation, talisman wearing, and taboo observance. While these methods can dispel evil and avert misfortune, they remain insufficient for prolonging life or eliminating all ailments.

When confronted with sudden disasters like malignant spirit hauntings or epidemic outbreaks—before the Golden Elixir is fully refined—one must rely on the "guarding the One" method. Just as armor serves in battle and raincoats in storms (seemingly useless ordinarily), without protection when arrows fly or tempests rage, one suffers grievous harm. Similarly, when illness strikes, the elixir remains incomplete, lifespan nears exhaustion, or evil Qi persists, mastering this life-preserving technique becomes essential.

Practicing "guarding the One" in mountain retreats repels all venomous creatures without requiring additional rituals. Specific methods appear in the Imperial Three-One Method (details omitted here).

Key principles for constructing alchemy laboratories: First select remote mountainous locations near water—preferably cliffside solitude ensuring no human or animal traces. The practitioner must wear talismanic seals, maintain purified fasting, excavate three feet of old soil, replace it with fresh compacted earth, then build a three-and-half-foot foundation—avoiding ancient tombs or ruins. The laboratory should measure three zhang in length and one zhang six chi in width, kept immaculately clean with full perimeter protection.

This scripture discusses the requirements for preparing divine elixirs (shen dan, the alchemical medicines used in Daoist practice) and methods for warding off malign influences.

Regarding the selection of an alchemical workspace: The ideal locations are deep mountains, great marshes, or uninhabited wilderness. If preparing elixirs in populated areas, one must construct high walls with thick partitions to ensure complete isolation. During the alchemical process, no more than two or three practitioners should work together, having first observed seven days of purification (zhai jie) and bathed with five aromatic substances to maintain purity. Contact with ritually impure places or funeral activities must be strictly avoided.

Construction methods for the alchemical chamber: The structure should be thatched with high-quality reeds, with both inner and outer walls built solidly. Install four-foot-wide doors facing due east and due south respectively, to be closed at night. The furnace must be placed precisely at the chamber's center, properly shielded on all sides. When situated in precipitous locations near cliffs or flowing water, the construction may be simplified—simply remove decayed materials, compact the area with quality earth, and bury protective talismans (fu zhou).

Techniques for exorcising malevolent spirits: When dwelling in mountainous areas troubled by evil influences, take grasses from the Qinglong position (the Liujia direction) with the left hand. Divide these equally and place half at the Pengxing position (Liuyi direction), then proceed through the Mingtang position (Liubing direction) to enter the Yinzhong position (Liuding direction), all while performing the ritual Yu Steps (Daoist sacred footsteps). After reciting incantations, place the grasses on the ground. Take earth with the left hand to anoint the face while shielding with grasses held in the right hand, then advance with the left hand protecting the heart. When reaching the Liugui and Liuding positions, hold the breath and stand still—this renders practitioners invisible to ghosts. The text further explains the directional names corresponding to the six Jia, Yi, Bing, and Ding positions.

Essential precautions for alchemical work: Choose only the most auspicious days (huangdao jiri) during each season's royal cycles, ensuring the celestial stems and earthly branches don't conflict. Begin only when skies are clear with bright sun and moon. When consuming elixirs, avoid overcast, snowy, or stormy weather—take them in tranquil surroundings. Strictly abstain from the five pungents (wu xin: onions, garlic, etc.), all meat and fish, sexual activity, and contact with mourning rituals during the elixir regimen. These taboos constitute the Great Medicine Prohibitions established by Hugangzi (an ancient alchemist). The ritual courtyard (fu fa ting yuan) before the alchemical chamber must measure ten paces square.

This scripture meticulously records the layout of the alchemical chamber and the methods for crafting vessels required to refine the "Nine-Cauldron Divine Elixir." It first describes the chamber's construction: a two-zhang-four-chi tall southern gate with doors, flanked by an eastward-flowing water channel in front, while the eastern and western sides symbolize the sun and moon respectively. The entire chamber's walls must be coated with fragrant clay, with primary elixir talismans (fulu) arranged at the four cardinal directions.

At the chamber's center, an altar must be erected to represent the Five Sacred Peaks (the Daoist holy mountains) and the Three Platforms (constellation names). A tiered platform should be built beneath the western wall, where various medicinal herbs and catalogs of divine elixir scriptures are placed—this ensures protection by the "Herb-Summoning Envoys," preventing malevolent forces from intruding.

Regarding the furnace construction: at the exact center of the room, build an east-facing stove with high-quality bricks and stones. Blend fine white earth and cattail-platform mud with bitter wine (vinegar) and east-flowing water to coat the furnace walls. Inside, place a tripod iron stand forged from raw iron, steadily supporting the medicine cauldron with a three-and-a-half-cun gap around it, while the furnace rim should extend two cun above the cauldron. During refinement, continuously feed chaff fire to maintain even heat.

If constructing a full Five Peaks-Three Platforms altar proves impossible, a simplified version may be arranged in the talisman chamber (the room storing ritual scripts): stack earthenware and stones, coated with yellow elixir clay. The iron tripod should be forged to match the cauldron's size, standardized at one-chi-six-cun in height.

The text particularly emphasizes avoiding iron tools in alchemy, as the Five Metals (gold, silver, copper, iron, tin) contain toxicity. Ancient masters favored earthen cauldrons (ceramic vessels), yet their crafting difficulty meant poor craftsmanship could cause medicinal essence to leak, ruining years of effort. The supreme earthen cauldron requires sealing with "Six-One Clay" (six plus one equaling seven, resonating with heaven-earth numerology)—this clay is prepared by firing seven materials (alum, arsenopyrite, rock salt, bittern, oyster shell, red halloysite, and talc) for twenty days.

This scripture primarily details the specific methods for crafting alchemical vessels and medicinal clay. In alchemical practices, a special material called "Six-One Clay" (Liuyi ni) is required, along with the technique for making red earthenware crucibles (alchemical pottery containers).

To prepare Six-One Clay, seven medicinal ingredients are needed: purple quartz, white stone, red halloysite, oyster shell powder, white talc, etc., each weighing twenty jin. These materials are pounded and mixed to enhance their medicinal efficacy. Among them:

• Alum stone (fanshi) can make the body light and bones strong, prolonging life
• Realgar (xiongshi) improves eyesight, regulates Qi, nourishes the liver, and quenches thirst
• Rock salt (rongyan) detoxifies and strengthens muscles
• Bittern salt (luxian) clears internal heat accumulation, stops vomiting, and calms panting
• Red halloysite (chishizhi) enhances wisdom, resists hunger, and extends lifespan
• White talc (baihuashi) makes the body light and strong, enduring hunger and thirst

The method for making red earthenware crucibles involves selecting reddish-yellow clay resembling chicken liver color. After pounding and sifting, it's steamed for half a day, then mixed with diluted wine into clay and repeatedly pounded until extremely fine. Three sets of six vessels each (for use and backup) should be prepared, about five fen thick, and dried in shade for thirty days. Smaller ones hold eight to nine sheng, while larger ones can contain up to one and a half dou.

Finally, white oak bark (hupi) is boiled into juice and reduced to a reddish-black "oak lacquer" (hugi), which is applied inside and outside the crucibles to prevent cracking during firing. This is the secret technique for making earthenware crucibles when refining divine elixirs.

The text mentions renowned Daoist alchemists Zuo Yuanfang (Zuo Ci) and Hu Gangzi, whose formulas were considered precious transmissions. These meticulous technical details demonstrate the exacting standards ancient alchemy maintained for vessels and materials.

This passage meticulously documents several special clay formulas and application methods for crafting the alchemical cauldron (liandan container) in ancient elixir preparation. There are four main types of clay: refined sediment clay, seven-mineral composite clay, central yellow sealing clay, and six-one clay (Liuyi ni), each with strict operational procedures.

The refined sediment clay is made by first pounding and sifting the raw materials, then mixing them with water in a basin to form a white slurry. After settling overnight, the clear water on top is discarded, and the fine sediment at the bottom is sun-dried. Coarse particles are re-pounded and sifted, then placed in an iron vessel and intensely fired for twenty days until they match the flame's color. After cooling, the material is filtered through silk mesh. This clay undergoes one hundred days of repeated processing before being applied inside and outside the cauldron with a goat-hair brush.

The seven-mineral composite clay uses equal parts of seven minerals: arsenopyrite (te sheng yu shi), alum (fan shi), talc (hua shi), red halloysite (chi shi zhi), rock salt (rong yan), and bittern salt (lu xian). These are pounded without sifting, fired for twenty days, then mixed with oyster shell powder. Two jin of each mineral is combined with one hundred jin of oyster powder, blended with vinegar into a paste for cauldron coating.

For the central yellow sealing clay (zhong huang mi gu ni), select fine, oily yellow earth, sun-dry it, then pound and sift. Treat it like oyster powder by washing with water, drying, forming plum-sized lumps, and firing intensely for three days until glowing red. After cooling, pound and sift again. Three jin of this earth is mixed with one jin of minium (huang dan, lead tetroxide), one jin of soaked paper pulp, and five jin of donkey-hide gelatin wine solution. After three thousand pestle strikes, steam for half a day before applying as an outer layer over the six-one clay.

The six-one clay application method first uses oyster clay to coat the red earthen cauldron (outer wall five fen thick, inner wall three fen), shaded to dry for ten days until completely hardened. Then apply a two-fen layer of six-one clay. Notably, six-one clay is only applied internally. The entire coating process takes ten days to gradually build to five fen thickness, with each layer shaded to dry for ten days followed by ten days of sun exposure.

The furnace sealing method involves first applying six-one clay to the junction where two cauldron mouths meet. After joining, gradually build thickness from the outer edge with more six-one clay, adding layers as it dries until reaching over one cun thickness for absolute sealing. Finally, reinforce the entire structure with central yellow divine clay (zhong huang shen ni).

These techniques reflect the ancient alchemical pursuit of ultimate container integrity. Each clay undergoes complex physicochemical processing, with multiple protective layers ensuring no leakage during elixir preparation. The entire production cycle often required months, demonstrating the rigorous craftsmanship tradition of Daoist external alchemy (waidan).

When refining the elixir, the alchemical vessel (丹釜) should ideally be shaped like an overturned bowl, with the smooth curvature of a goose egg. This form provides the best seal. If not shaped this way, when sealing with Six-One Clay (六一泥, a special sealing compound), the fire's intensity may cause the elixir's essence to dissipate, leading to vessel cracks and leakage of medicinal Qi.

The ancient masters Anqi Sheng and Guang Chengzi, though possessing alchemical scriptures (丹经) and numerous oral instructions, failed to complete the elixir for over thirty years. Only after obtaining this divine clay's secret method did they succeed in a single attempt, achieving ascension to immortality.

A crucial warning: Many elixir recipes incorporate horse or goat hair into the clay mixture, but these fibers char when exposed to fire, creating air gaps that cause leaks. The clay must be completely dry before firing—any residual moisture will cause cracking under heat. Test the clay's dryness first by applying it to another container and observing during trial firings.

The essential procedure: First dry the clay in shade (阴干, air-drying in ventilation), then sun-dry for ten days. Earthenware vessels may retain moisture for hundreds of days of shade-drying and still dampen when fired, especially when vinegar (added for adhesion) is mixed in the clay. Rigorous testing is mandatory.

Application technique: Coat the interior before the exterior, using molds to control thickness. Knead and shape the clay continuously during the semi-dry stage—never let it dry unattended. During rainy weather, dry it indoors with auxiliary fire heat rather than waiting for natural air-drying, or you'll miss the optimal timing.

Clay preparation: Achieve ideal viscosity and apply with a goat-hair brush. First cleanse the goat hair with plant ash, preparing multiple brushes as backups.

Regarding vinegar mixing: Pure vinegar suffices for Six-One Clay preparation—no Hua Chi Water (华池水, special medicinal liquid) is needed. However, refining golden cinnabar (金砂) requires following specific classical formulas. The scripture's mention of "one hundred days" indicates the minimum duration—longer periods yield better results.

(Note on medicinal pounding: Though not detailed here, this refers to grinding herbs into perfectly fine, uniform consistency.)

When crafting alchemical vessels, it's best to use fine silk sieves for sifting herbs, eliminating the need for additional grinding.

Regarding the immortal cauldron (xianfu) method of Master Hugangzi (a renowned ancient alchemist): Select pure, reddish-yellow clay from the south, repeatedly wash it to remove impurities, and mix it to a medium consistency. First, shape a cauldron mold seven inches deep and twelve inches in diameter, ensuring uniform thickness of one inch throughout. Other alchemical cauldrons should follow this standard, adjusting size based on the amount of medicine. Once formed, let it dry in a shaded area for one month.

When constructing the ceramic furnace, place the cauldron inside and heat it first with gentle fire (wenhuo), then gradually increase to strong fire (wuhuo). After cooling, store the cauldron in a clean room to avoid contamination. This type of cauldron can be used without firing but requires careful maintenance.

Hugangzi’s cauldron clay formula (for refining high-grade elixirs): One jin each of purple quartz (zi shiying), white halloysite (bai shizhi), oyster shell powder (muli fen), and white talc (bai huashi). Crush and sieve each separately, then blend with the juice of Yin Beast Mystic Essence (a special alchemical liquid) to form a paste. Shape into egg-sized balls and sun-dry. Stack them in a furnace and fire continuously for ten days and nights, then smother the fire and let them sit for another ten days. Once cooled, grind them into fine powder again, mix with brine (rongyan) to form a paste, and boil in Hua Chi (alchemical term for specially treated water) until it becomes clay. Apply each layer to the cauldron walls at a thickness of one fen (about 3 mm), repeating three times.

The most remarkable step involves coating the inner walls with Mystic Yellow Clay (xuanhuang ni), maintaining the same thickness per layer. Careful inspection is crucial—no hairline cracks or impurities can be tolerated, as airtightness is paramount.

The method for preparing the Mystic Yellow Medicine (xuanhuang yao) for the immortal cauldron: Hugangzi combined ten jin of Mystic Silver (xuan yin), one jin of lead white (qian bai), and five jin of Thrice-Refined Lead Yellow Essence (sanzhuan qian huanghua), placing them in an earthen cauldron and refining them with intense fire from dawn to dusk. The extracted lead essence takes on a golden hue, called "Mystic Yellow" (xuanhuang), also known as "Flying Lightness" (fei qing) or "Flying Flow" (fei liu). Separately, refine lead powder (hu fen) in an iron vessel until it turns gold, then mix it equally with the Mystic Yellow. Pound ten thousand times, blend with Left Taste (zuowei, an acidic liquid), and knead into clay.

Though these methods for immortal cauldrons and medicinal clays do not belong to the orthodox Nine Cauldrons Divine Elixir (jiuding shendan) tradition, their proven efficacy makes them worth recording. No other techniques compare to this supreme formula.