《真仙祕傳火候法》

The fourth section of Secret Transmission of the True Immortals' Fire Regulation Method discusses the techniques for controlling the "fire timing" (huohou) in Neidan (internal alchemy) practice. Here, "fire timing" does not refer to imagined empty Qi or the breath, but to the actual Jing (essence) and Qi (vital energy) within the human body. It is specifically divided into three types:

The fire generated by the heart is called "sovereign fire" (the dominant fire), known as the upper flame. The fire produced by the kidneys is called "ministerial fire" (the supporting fire), termed the middle flame. The fire arising from the bladder is called "commoner fire" (the foundational fire), referred to as the lower flame. When these three types of Qi gather, they form true fire; when dispersed, they return to Qi. Hence, they are collectively called the "samadhi true fire."

During cultivation, the movement of this fire must follow regular cycles, much like the celestial bodies. The text mentions "fifteen liang and three hundred sixty zhu" (ancient units of measurement), metaphorically representing the precision of the celestial cycles. Just as the heavens undergo changes every five days, practitioners must adjust their fire timing every five days in their cultivation.

Specific cultivation methods include:

1. Sitting in meditation between the hours of Xu (7-9 PM) and Zi (11 PM-1 AM), maintaining mental tranquility.

2. Gently massaging the sides and abdomen while keeping the breath fine, long, and even.

3. Visualizing a wheel of fire rotating in the Dantian (lower abdomen).

4. Initially feeling slight discomfort in the abdomen, which gradually turns into warmth.

Persistent practice can replenish deficiencies, boost Qi, and prolong life. The cultivation is divided into three stages:

1. First 100 days: Using "five liang of fire" (a metaphor for the intensity of fire timing), practice from Xu to Zi hours to refine "mercury-like essence" (the preliminary stage of Neidan).

2. Middle 200 days: Using "ten liang of fire," practice from You (5-7 PM) to Zi hours to refine "golden sand" (the intermediate stage of Neidan).

3. Final 300 days: Using "fifteen liang of fire," practice from Shen (3-5 PM) to Zi hours to refine pure Yang Qi.

The entire process takes 600 days, using thirty liang of fire, which is called "completing three thousand merits" (signifying the fulfillment of cultivation).

The concluding section mentions that the optimal time to begin Golden Elixir (Jindan) cultivation is on the Jiazi day of the eleventh lunar month (around the winter solstice), when Yang Qi first emerges, symbolized by the hexagram "Earth Thunder Return" (Dilei Fu) in the Yijing (representing the revival of Yang Qi). When the Kun hexagram (pure Yin) gives rise to a single Yang line, it transforms into the Zhen hexagram (associated with Wood, representing Yang). This nascent Yang Qi is likened to silver within mercury, metaphorically illustrating the principle of Neidan formation.

This scripture elucidates the "fire timing method" (huohou fa) in Daoist Neidan (internal alchemy) practice, which refers to techniques for regulating the flow of internal energy. The core teachings can be understood as follows:

Cultivation begins with foundational work, analogous to the gradual transformation from the pure Yin Kun trigram to the returning Fu trigram (with its first Yang line) in the Bagua (Eight Trigrams). This symbolizes the initial nurturing of "yellow sprouts" (huangya)—the budding of primordial Qi within the body. Specific practices include:

1. Temporal Calculations: Divide each lunar month into three five-day periods (hou), each corresponding to an energy cycle. Practitioners should sit upright with suspended breath, guiding the heart-fire (energy) from the crown downward through the Dantian (lower abdominal energy center), circulating this flow day and night across a measured path of 810 zhang (about 2.7 km).

2. Breath Measurement: Quantify the fire timing through respiration—ordinary breathing moves energy six cun (about 18 cm) along the meridians. Four breaths equal one "knife" (2.4 chi), ten knives make one "tablet" (gui), and 100 tablets form one "grain" (zhu). This 384-zhu system corresponds to the solar year (360 days) and 24 seasonal nodes.

3. Alchemical Stages: As practice progresses, practitioners must "shift the cauldron" (adjusting focal points), gradually adding "yellow sprouts and white snow" (Yin-Yang energies) to refine in the Dantian. After nine months of nine transformations, the "ninefold cycled golden elixir" (jiuzhuan jindan) is achieved.

4. Fire Regulation: Different timings require specific intensities:

• Zi hour (11pm–1am): 161 martial-fire (wuhuo) breaths
• Yin hour (3–5am): 108 civil-fire (wenhuo) breaths
• Wu/Ji periods: 64 breaths
• Jia/Bing periods: 72 breaths

5. Key Precautions:

• After taking medicinal Qi, sit quietly with hands lightly covering the external kidneys to clear distractions
• Maintain 72 breaths of tranquil abiding
• Avoid emotional fluctuations
• Preserve accumulated energy without expenditure, like an army deployed but not engaged in battle

The text quantifies the complex alchemical process into precise breath counts and energy measurements, emphasizing meticulous control and sustained dedication. Terms like "yellow sprouts," "white snow," and "ninefold cycled golden elixir" are specialized Neidan terminology denoting progressive stages of internal energy transformation.

In the practice of alchemy, one must master the two crucial time periods: the Zi hour (11 PM to 1 AM) and the Wu hour (11 AM to 1 PM). Employ the method of "Nine Cauldrons and Five Words" (a Neidan term referring to the five key stages of the nine-cycle golden elixir: deficiency, preservation, contraction, absorption, and closure), also known as the "Five Stabilization Method."

During cultivation, realized adepts will occasionally reveal the profound secrets of alchemy. When I first began my Daoist practice, I heard this immortal saying: "The secrets of immortals are not actually mysterious—what's most difficult is when sages teach the 'medicinal substances' (referring to Jing, Qi and other essential materials for alchemy) but withhold the 'firing times' (referring to the control of fire intensity and timing during alchemy)." The principles of medicinal substances can still be understood, but the mysteries of firing times are truly challenging to grasp.

Later, as I traveled extensively seeking teachers and companions, I gradually comprehended the directional attributes: the Li fire of the south, the Kan water of the north, the wood Qi of the east, and the metal essence of the west. I also understood the principles of dragon-tiger (referring to Yin-Yang energies) ascending and descending, and sun-moon (referring to original spirit and original Qi) conjunction. Regarding the cauldron-vessel (alchemical apparatus), medicinal substances (Jing-Qi-Shen), and the three passes (key acupoints at the coccyx, thoracic spine, and jade pillow), I grasped the principle that following the natural order leads to death while reversing it leads to life. Yet the firing times remained elusive, preventing the golden elixir from congealing.

I pored over countless scriptures trying to uncover their secrets, but found my wisdom insufficient to penetrate their depths—ultimately, realization had to come from within. Moreover, when true immortals discussed the crucial aspects of firing times, they all emphasized the necessity of receiving personal transmission from an enlightened teacher. Many cultivators abandoned their practice midway precisely because they lacked authentic transmission—their numbers were as countless as ox hair. I secretly rejoiced at having encountered this supreme opportunity, for without obtaining the secret of firing times, I too might have joined the ranks of those who gave up.

Thus I devoted myself day and night to studying the collected immortal scriptures and secret texts. Though I felt some understanding dawning, I still dared not be certain. After several years of this, I suddenly met an accomplished master who transmitted this wonderful secret. After receiving my teacher's guidance and cross-referencing with immortal scriptures, I found every word matched perfectly. Only then did I understand what the scriptures meant by "mere reading of words ultimately fails to reveal true meaning." Without meeting a true teacher, those texts would have remained empty talk!

After receiving the true transmission, I immediately began cultivation. Through eighty-one days (the yang number nine squared) of celestial cycle circulation, I finally refined the great elixir. Now I truly comprehend the profound meaning behind the immortal scripture's words: "The secret is not difficult—the difficulty lies in transmitting the firing times without the medicine." This is because they feared ordinary people might obtain it too easily and profane celestial secrets with casual attitudes, while sincere cultivators might study alchemical texts yet never meet an enlightened teacher, forever remaining confused about firing times. Thus they had no choice but to use the hexagram imagery from the Book of Changes, employing the waxing-waning of sun-moon and the ascending-descending of Yin-Yang to symbolize the patterns of refining and adjusting Jing-Qi during alchemy.

Remember that the foundation of alchemy lies in true lead (original Jing) and true mercury (original Shen), while firing times are the crucial key. Beginning practitioners must take Jing, Qi, and Shen as their foundation and make mastering firing times their primary practice.

This passage reveals the esoteric principles of "fire timing" (huohou) in Daoist Neidan (internal alchemy) practice—the art of regulating intention and breath during cultivation. The core teachings are:

The human body's most precious treasures are the Three Jewels: Jing (essence), Qi (vital energy), and Shen (spirit). Among these, Shen manifests supreme numinosity, Qi holds ultimate value, and Jing-blood requires utmost preservation. The eyes, positioned below the forehead, serve as windows to the spirit; the mouth and nose form gateways for Qi; while the coccyx (tailbone region) acts as the passageway for Jing. Shen divides into Yin and Yang aspects, Qi contains pure and turbid qualities, and Jing flows in both normal and reverse currents—all crucial considerations for practice.

When sages engage in cultivation, they first stabilize the mind to attain mental stillness, refine Qi through emptiness, and reverse the natural flow of Jing to concentrate it within the Dantian (Yellow Chamber). Practitioners must open the "Golden Lock and Jade Pass" (key meridians and energy gates), circulate the Microcosmic Orbit, causing Jing to surge like silver waves and golden essence to ascend to the crown. This process follows celestial patterns, aligning with solar-lunar cycles and the mutual generation-restraint of the Five Phases (Wood, Fire, Earth, Metal, Water), using trigrams merely as auxiliary references.

The text details various fire-timing methods: Cosmic Orbit Fire, Heaven-Earth Encompassing Fire, Samadhi Body-Burning Fire, Kalpa-Dissolving Spirit-Turtle Fire, among others. Particularly, the Civil and Martial Fires (gentle and intense modes respectively) prove essential for reversing the Three Passes (coccyx, thoracic spine, and jade pillow). The Spirit-Turtle Fire—generated through Yin-Yang coupling—penetrates these passes: its downward flow produces offspring, while its upward reversal achieves transcendence.

The essential technique lies in using Civil Fire to gently nurture while guarding the Mysterious Pass (Dantian), and applying Martial Fire for vigorous refinement in harmony with solar-lunar rhythms. When masculine and feminine Qi unite, they generate kalpic fire—understanding this reveals fire-timing's essence. Practically, one operates two trigrams (Qian/Kun etc.) daily, employing "talisman fire" through ascending-descending exchanges. The Zhen (Thunder) and Xun (Wind) trigrams' fiery manifestations form alchemy's foundation: advancement employs Yang fire (Wood nature), retreat uses Yin fire (Metal-Water nature). One must coordinate daytime Yang talismans with nighttime Yin symbols, reversely apply the Three Origins (Jing-Qi-Shen), and adjust twelve yao-lines (trigram components) according to seasonal and diurnal cycles to match the 360-degree cosmic circuit. Such profound methods transcend foolish speculation.

(Note: "Talisman fire" refers to fire-timing techniques combined with Fulu (talismanic practices); the "Three Passes" are key points along the Governing Vessel meridian; "Three Origins" denote the Three Treasures)

This passage explains the "fire timing method" (huohou fa) in Daoist alchemy, which refers to the secret technique for controlling the internal energy flow during Neidan (internal alchemy) practice.

The core principle states that the fire timing method transmitted by true immortals follows the cycles of years, months, days, and hours. Within the twelve months of a year, excluding the second and eighth months, practitioners should circulate two hexagrams daily during the remaining ten months (totaling sixty hexagrams). Over these ten months, the fire timing is applied six hundred times. These six hundred applications are used to congeal the internal elixir, after which the fire must be stopped.

The specific cultivation method includes:

1. Timing: Between midnight (11 PM - 1 AM) and noon (11 AM - 1 PM), focus on circulating the Fu and Gou hexagrams (from the Book of Changes), while regulating one's Qi (vital energy).

2. Posture requirements: Sit upright with proper dignity, forming the "zi" hand seal (a specific mudra), eliminating distracting thoughts, and maintaining single-minded concentration.

3. Breathing technique: During breath retention, contract the external kidneys and anus while silently counting seventy-two breaths.

4. Guiding movements: Bend forward slightly, allowing Qi to rise from the coccyx to the spine's central channel, then to below the third thoracic vertebra. Turn the head left while shaking the shoulders, using the right middle finger to press the right nostril while inhaling.

5. Special operations: Plug both ears with middle fingers and hold the breath tightly. When Qi surges through specific acupoints, it will flow from the back of the head to the forehead, then descend through the brow center—at this moment, a sweet taste will appear in the mouth.

Note: The term "obtaining the seed" refers to the embryonic form of the internal elixir that appears at certain stages of practice. "Caoxi" indicates the acupoint at the crown of the head, while "ziwen" denotes a specific hand seal posture. These cultivation methods require guidance from a qualified master and should not be attempted blindly without proper instruction.

This passage explains the specific methods of "fire timing" (huohou, referring to the regulation of breath and intention during practice) in Daoist Neidan (internal alchemy) cultivation:

Begin by pressing the tongue against the upper palate. When the mouth fills with saliva, swallow it slowly while visualizing it descending from the lungs to the Dantian (energy center in the lower abdomen). After briefly adjusting the breath, repeat the process. If the Qi (vital energy) feels unstable, stabilize it through natural nasal inhalation.

The optimal practice periods are:

• The half-hour after midnight (23:00-1:00), when Yin energy peaks and Yang energy begins to emerge (corresponding to the Fu hexagram)
• The half-hour before noon (11:00-13:00), when Yang energy peaks and Yin energy begins to emerge (corresponding to the Gou hexagram)

During practice, one must:

1. Circulate Qi to return essence (Jing) and nourish the brain, allowing the energy to penetrate the three barriers (the coccyx, spine, and occiput)

2. Maintain specific postures: bend slightly at the waist, tuck the chin, curl fingers like hooks, and perform nine shallow breaths followed by one deep breath while holding the breath

3. Coordinate with anal contraction, repeating each set of movements 72 times

4. Choose to perform 3, 5, or 7 sets of 72 repetitions. Three sets represent gentle "civil fire," while seven sets represent intense "military fire"

Special considerations:

• The monthly practice cycle should align with lunar phases
• The optimal hours are between 19:00-23:00 (Xu and Hai hours), when Heaven and Earth's Yin and Yang energies harmonize
• After nine consecutive months of practice (nine cycles), the Golden Elixir (Jindan) will be perfected
• When mature, the Golden Elixir resembles a golden pellet with vermilion hues, at which point fire timing practice can cease

The text emphasizes maintaining focused awareness (holding to the One) during practice, carefully observing Yin-Yang timings, and guiding the flow of essence and energy through specific breathing techniques and movements. Upon completing the nine cycles, one may attain longevity equal to Heaven and Earth.