《素問入式運氣論奧》

The Suwen Rushi Yunqi Lun'ao classic primarily elucidates the operational principles of the Five Phases (Wood, Fire, Earth, Metal, Water) and the Six Qi (cold, heat, dryness, dampness, wind, fire). The opening section presents calculation charts and mnemonic formulas for determining qi movements, such as the sixty-year cyclical qi diagram and the climatic patterns corresponding to the Heavenly Stems and Earthly Branches.

The mutual generation and restriction among the Five Phases follow clear logic. The systems of Heavenly Stems-Earthly Branches, Five Movements-Six Qi, and even the patterns of annual, monthly, daily, and hourly changes are all founded upon this principle. In the heavens, these manifest as climatic phenomena of cold, heat, dryness, dampness, and wind; on earth, they materialize as the five substances of metal, wood, water, fire, and earth. The interaction between celestial qi and terrestrial forms gives birth to all beings—this constitutes the fundamental law of cosmic generation.

Specifically:

The eastern direction corresponds to Wood and spring. "Wood" signifies touching and sprouting, representing yang qi stirring the earth to make all things bud. Water flows eastward to nourish trees, while trees grow upward yet root downward—this is nature's pattern.

The southern direction corresponds to Fire and summer. "Fire" denotes transformation and dissolution, where yang qi ascends above yin qi, using scorching energy to alter all forms. Fire emerges from Wood (as in drilling wood for fire), yet it lacks fixed form—once its energy dissipates, it returns to nature.

The western direction corresponds to Metal and autumn. "Metal" implies restraint and contraction, marking yin qi's initial suppression of growth. Metal originates from Earth (as gold sifted from sand), born of earth yet distinct from it—this reflects its natural characteristic.

The northern direction corresponds to Water and winter. "Water" signifies moistening, as yin qi nourishes all beings. Water generates from Metal (as metal condenses vapor), always meandering eastward—this is water's intrinsic nature.

The central direction corresponds to Earth, also governing southwest, and aligns with late summer. "Earth" means receiving and releasing—it both gestates new life and receives what perishes, serving as all things' final destination. Earth arises from Fire (as fire reduces matter to ashes), and though Earth restricts Water, overwhelming water can reverse this restraint—this exemplifies nature's balancing principle.

When Five Phases restrict each other, the "child" of the restricted phase avenges its "mother": Wood restricts Earth, but Earth generates Metal which counters Wood; Metal restricts Wood, yet Wood produces Fire that counters Metal; Fire restricts Metal, but Metal yields Water that counters Fire; Water restricts Fire, yet Fire creates Earth that counters Water; Earth restricts Water, but Water fosters Wood that counters Earth. Mutual generation initiates cycles, while mutual restriction concludes them—thus the wheel turns perpetually.

This scripture elucidates the natural principles of mutual generation and restraint among the Five Phases (Wuxing), as well as the correspondences between celestial stems/terrestrial branches and seasonal phenomena.

The Five Phases maintain relationships of mutual regulation: Earth (Tu) can channel excessive Wood (Mu) energy, Water (Shui) can break through stagnant Earth qi, Fire (Huo) can dissipate accumulated Yin energy, Water can extinguish raging flames, Metal (Jin) can be melted by intense fire, while hard Metal restrains soft Wood, and trees in turn are felled by metal tools. These five elements cycle continuously—moving harmoniously they generate one another, moving contrarily they restrain one another—each fulfilling its role to form nature's fundamental patterns.

Regarding the coordinated application of celestial stems and terrestrial branches, sages studied the waxing and waning patterns of Yin-Yang, using the ten heavenly stems (Jia to Gui) and twelve earthly branches (Zi to Hai) to mark the movements of celestial and terrestrial energies. Beginning with Jia among the stems and Zi among the branches, their sixty possible combinations form the sexagenary cycle, which serves both for calculating annual fortunes (sixty-year periods) and daily hours (twelve double-hours). Through this system, one can predict cyclical prosperity or decline, seasonal transitions, and even the life-death patterns of all beings.

The ten heavenly stems correspond to Five Phase orientations: Jia and Yi (Wood) govern the east and spring; Bing and Ding (Fire) rule the south and summer; Geng and Xin (Metal) dominate the west and autumn; Ren and Gui (Water) command the north and winter; Wu and Ji (Earth) reside at the center, permeating all seasons. Each stem carries specific symbolism: Jia represents young plants still wrapped in Yin qi; Yi signifies Yang energy half-emerged but not fully extended; Bing denotes the flourishing vitality of all things; Ding embodies the equilibrium between Yang and Yin energies; Wu is the Yang-earth that nourishes growth; Ji is the Yin-earth that gestates life; Geng marks the transition where Yin succeeds Yang; Xin symbolizes Yang energy latent beneath Yin's surface.

These intricate correspondences not only forecast natural transformations but also reveal human fortunes and the progression of illnesses, embodying the profound wisdom of cosmic-human resonance.

This passage elucidates the correspondence between the celestial stems and earthly branches with the principles of Yin-Yang and the Five Phases (Wood, Fire, Earth, Metal, Water), as well as seasonal phenomena. In modern terms:

Among the ten celestial stems, Geng and Xin both belong to the Metal phase, whose corresponding flavor is pungency—a taste that manifests only when things reach maturity. Ren and Gui represent the Water phase, corresponding to winter. Ren signifies the initial gestation of Yang energy (where Yang receives its form from Yin), while Gui indicates the state where all things withdraw and store their vitality underground. This resembles plants conserving energy during winter in preparation for sprouting, reflecting nature's inherent patterns.

The ten celestial stems divide into Yin and Yang pairs: Jia, Bing, Wu, Geng, and Ren belong to Yang, while Yi, Ding, Ji, Xin, and Gui belong to Yin. Each of the Five Phases contains both Yin and Yang aspects, thus forming the complete set of ten stems. The twelve earthly branches correspond to the eight directions of the earth, and their combinations with the celestial stems produce infinite variations through temporal progression.

Detailed explanations of monthly branches:

The Zi month (11th month) represents the extreme cold of the northern Water position, yet this is when Yang energy first emerges, akin to fetal gestation. In the Chou month (12th month), Yin energy remains dominant, resembling a knot being tied. The Yin month (1st month) sees rising Yang energy as human activity resumes, marked by the ancient practice of measuring solar terms with pitch pipes. During the Mao month (2nd month), the sun ascends and all things flourish. The Chen month (3rd month) witnesses Yang energy surpassing its midpoint, causing vibrant growth. The Si month (4th month) embodies pure Yang without Yin, representing the peak of development. The Wu month (5th month) reaches Yang's zenith while Yin begins its birth. The Wei month (6th month) parallels the maturation of plants bearing flavor, analogous to Metal's pungency. The Shen month (7th month) initiates Yang energy's contraction.

These concepts formed the foundation of ancient Chinese calendrical astronomy, explaining natural phenomena through the waxing and waning of Yin-Yang and transformations of the Five Phases.

The seventh month corresponds to the earthly branch Shen (申), when the active Yang energy manifests its effects while the receptive Yin energy also reaches the Shen position, creating a thoroughfare between celestial and terrestrial Qi. People begin to witness the descent of white dew and the falling of leaves—these are the seasonal phenomena characteristic of this period. Shen also carries the meaning of "body" (身), signifying that all things have fully developed their physical forms. The eighth month corresponds to You (酉), the time of the sun's western descent when Yin energy reaches its peak state. You further implies "contraction" (輶), indicating all things beginning to withdraw and condense.

The ninth month aligns with Xu (戌), where Yang energy hasn't completely dissipated but has ceased functioning, lying concealed within the Xu earth (Xu represents the northwest Qian position, the celestial gate). Xu also means "extinction" (灭), marking the stage when all things enter decline. The tenth month corresponds to Hai (亥), the time of pure Yin. Hai additionally signifies "judgment" (劾), representing how Yin energy begins its stern execution upon all things—this being the natural law of the earth.

The ten heavenly stems represent the celestial operation of the Five Phases (with their Yin-Yang alternations), while the twelve earthly branches signify terrestrial orientations. Among these, Zi (子), Yin (寅), Wu (午), and Shen (申) belong to Yang; Mao (卯), Si (巳), You (酉), and Hai (亥) to Yin. The Earth phase distributes at the end of each season: Chen (辰) and Xu (戌) belong to Yang, while Chou (丑) and Wei (未) belong to Yin. The pairing of ten heavenly stems with twelve earthly branches forms the sixty-year Jiazi cycle, where six cycles of sixty days constitute one year—this is the principle stated in the Suwen: "Heaven completes one year through six sixfold periods."

The twelve earthly branches are also called the twelve pitch-standards or twelve celestial hours, each corresponding to a primary star among the twenty-eight lunar mansions (known as stellar creatures). For instance, the Yin palace corresponds to the Tail constellation (Fire Tiger) and Winnowing Basket constellation (Water Leopard), while the Chen palace aligns with the Neck constellation (Golden Dragon) and Horn constellation (Wood Serpent)—with the Tiger and Dragon being primary stars and the others secondary. Designations like "Fire Tiger" and "Golden Dragon" employ the seven luminaries (sun, moon, and five planets) as markers, with so-called "secret days" referring to their rotating daily assignments. Though the Suwen doesn't explicitly record these details, they all belong to the profound mysteries of Yin-Yang theory.

Regarding Nayin (the ancient correlation between musical tones and stems-branches): The pairing of ten heavenly stems and twelve earthly branches forms the sixty Jiazi cycles, representing the operating principles of heaven and earth. Jia symbolizes the eastern springtime and the birth of all things; Zi represents the north and the initial sprouting of Yang energy—hence Jiazi stands at the head of the sixty-cycle sequence, followed by Yichou.

This passage explains the ancient Chinese musicological method of "nayin" calculation, which corresponds with the cyclical patterns of the Five Phases (Wood, Fire, Earth, Metal, Water). The ancients used the twelve earthly branches (zi, chou, yin, mao, etc.) in combination with the ten heavenly stems (jia, yi, bing, ding, etc.) to calculate musical pitch variations, akin to modulation in music.

Specifically, each two-hour earthly branch period contains five pitch variations. For example, the "zi" period is divided into jiazi (Metal), bingzi (Water), wuzi (Fire), gengzi (Earth), and renzi (Wood). This calculation method originates from the "like marries like, skip eight to bear offspring" principle recorded in the Han dynasty text White Tiger Discussions.

"Like marries like" refers to yang stems (jia, bing, wu, geng, ren) pairing with yang branches (zi, yin, chen, wu, shen, xu). However, pure yang pairings would be excessively rigid, so they must "marry" yin branches (chou, mao, si, wei, you, hai) for balance. For instance, jiazi (yang) pairs with yichou (yin), much like a man taking a wife.

"Skip eight to bear offspring" means that every eighth position generates a new pitch. Starting from jiazi, counting eight positions lands on renshen (Metal), then another eight to gengchen (Metal). After three such cycles, the Metal pitch calculation is complete. The same method applies to Fire, Wood, Water, and Earth, each completing three cycles to form a full rotation. Note that "skip eight" does not mean the eighth position directly but rather skipping eight intervals in between.

Why start with Metal? Because the ancients believed metal-cast bells and chimes best manifested sound (bells correspond to the Dui trigram, associated with the White Tiger of the West and the lungs in the body). Autumn, when all things wither and winds howl mournfully, embodies Metal's nature. The pitch cycle moves from west to south (clockwise), with yang qi born at midnight (zi hour) descending and yin qi born at noon (wu hour) ascending—mirroring the interaction of heaven and earth's energies.

This "three cycles complete the pattern" principle stems from the Yijing's "Three Powers" concept—heaven, earth, and humanity each composed of threefold elements. Thus, pitch calculation also follows the rule: "Three completes heaven, three completes earth, three completes humanity."

Laozi states that "the Dao gives birth to the One (Dao gives birth to One), the One gives birth to the Two (Yin-Yang), the Two gives birth to the Three (Heaven-Earth-Humanity), and the Three gives birth to all things," which describes the complete process from creation to manifestation. The cyclical transformation of the five musical notes completes one revolution in twelve shichen (two-hour periods), with each shichen containing five notes, thus forming thirty tonal positions corresponding to the sixty-year Jiazi cycle. Therefore, the classics state that when Yin and Yang intertwine, transformation occurs, and that through the mutual resonance between heaven and earth and the interaction of ascending and descending Qi, all changes arise.

The sixth chapter discusses six types of Qi transformation. The Five Phases (Wood, Fire, Earth, Metal, Water) manifest in earthly forms as the foundation of all mundane phenomena, with their generative and controlling cycles serving as the origin of all things. Tracing their origins upward, these Qi transformations are infinite. In the human body, they form functional centers, while in nature they manifest as the life-giving alternation of cold and heat. Thus, ancient sages deeply investigated these mysteries and composed the Huangdi Neijing (Yellow Emperor's Inner Canon), proposing the theory that "on earth they take form, in heaven they become Qi."

The Five Phases evolve into six Qi because Fire is divided into sovereign fire (ruler) and ministerial fire (assistant). The six Qi are cold, heat, dryness, dampness, wind, and fire - the primordial energies of heaven. These correspond to the three Yin and three Yang aspects, known as the "manifestations" (biao). The relationship between essence and manifestation will be explained in detail later.

Each Qi has specific functions: Earth Qi transforms into dampness and rain, Metal Qi transforms into dryness and clarity, demonstrating their inherent natures. Wood Qi transforms into wind, governing spring. The original meaning of "spring" (chun) signifies stirring movement, representing the awakening of Yang Qi, hence wind invigorates all things like a celestial command. Sovereign fire transforms into warmth, governing late spring and early summer, providing gentle heat without scorching intensity, embodying the ruler's benevolent virtue. Ministerial fire transforms into summer heat, governing the summer season - the character "summer" (xia) originally meaning "flourishing," corresponding to the noon hour when heat prevails. Metal Qi transforms into clarity and dryness, governing autumn - the character "autumn" (qiu) originally meaning "gathering in," as cool weather arrives and white dew descends. Metal corresponds to the heavenly stems Geng and Xin, with Xin pairing with Bing (fire), hence its drying nature. When westerly winds follow prolonged rain and bring clear skies, this signals dryness arriving; if westerly winds bring rain instead, it indicates contention between dryness and dampness. Water Qi transforms into cold, governing winter - the character "winter" (dong) originally meaning "conclusion," when severe cold arrives. Earth Qi transforms into dampness, maintaining the moist environment necessary for all things to grow.

This passage primarily discusses the relationship between seasonal climate changes and the movement of the Five Phases (Wood, Fire, Earth, Metal, Water). The sixth month belongs to "Long Summer," when Earth Qi is at its peak, as Earth is born from Fire (summer belongs to Fire), coinciding with the season of alternating heat and humidity. Moist soil brims with vitality, while dry earth loses its vigor—just as springs emerging from the ground testify to the presence of moisture.

Classical texts state: "Earth Qi ascends to form clouds, while Heaven Qi descends as rain." Rain originates from Earth Qi, and clouds derive from Heaven Qi, illustrating the transformative relationship between Earth and precipitation. The alternation of cold and heat across the four seasons, governed by the six climatic influences (wind, cold, summer heat, dampness, dryness, and fire), creates unique conditions each year. Spring warmth, summer heat, autumn coolness, and winter cold represent normal seasonal patterns, but when external climatic factors disrupt the dominant Qi of a season, abnormal changes occur.

The pattern of seasonal climate variation follows this principle: Each season's characteristic climate begins to manifest during its middle month (e.g., February, May, August, November) and peaks in its final month (March, June, September, December). For instance, spring weather emerges in February and reaches its warmest in March; summer begins in May and becomes most intense in June. Although Yin Qi begins growing at the summer solstice in May, the weather grows hotter; while Yang Qi starts increasing at the winter solstice in November, the weather turns colder—this occurs because newly generated Qi develops from below upward. It mirrors natural phenomena like cool well water in summer and warm well water in winter, reflecting fundamental patterns of climatic change.

The subsequent references to "Diagram of Seasonal Climates" and "Chapter Six: On Seasonal Climates" demonstrate how ancient observers derived these natural laws by studying the movements of sun and moon and transformations of Yin-Yang. They employed the shifting patterns of the six climatic influences and the operations of the Five Phases to predict weather, embodying the Daoist concept of correspondence between Heaven and humanity.

This passage explains the fundamental principles of ancient astronomical calendrics. Through prolonged observation of the movements of the sun and moon, ancient scholars developed a precise calculation system that remained accurate for millennia without error.

A five-day period was called a "hou" (cycle), three hou (15 days) formed a "qi" (solar term), six qi (90 days) constituted a "season," and four seasons (360 days) made up a "year." The sun, belonging to Yang, and the moon, belonging to Yin, each followed fixed trajectories and distances. The sun traveled one degree per day, while the moon covered slightly more than thirteen degrees daily. Accumulated over time, the alternation of long and short months totaled 365 days in a year, with intercalary months adjusting for the extra time.

The sun completes its celestial circuit in precisely 365 and a quarter days—exactly one year. Every five days corresponds to a natural transformation, and three hou (15 days) form a solar term. Three solar terms (45 days) compose a season, with the year divided into eight major solar terms such as the Beginning of Spring and the Spring Equinox. The twenty-four solar terms distributed across the four seasons complete the annual cycle.

The Spring and Autumn Equinoxes are called "fen" (dividing points) because the Yin and Yang energies reach equilibrium at these times. During the Spring Equinox, day and night each last 50 ke (an ancient time unit), marking the balance of Yin and Yang. The Summer and Winter Solstices are called "zhi" (extremes) because Yang or Yin energy peaks: the Summer Solstice has the longest day at 60 ke, while the Winter Solstice has the shortest at 40 ke.

The celestial dome rotates from west to east, while the sun, moon, and five planets (Venus, Jupiter, Mercury, Mars, and Saturn) move from east to west. The ancients believed that the heavens, being Yang, rotated leftward (clockwise), whereas the celestial bodies, being Yin, moved rightward (counterclockwise)—just as ministers retreat backward when meeting the emperor. This celestial motion also reflects the correspondence between Yin and Yang.

This passage explains the ancient Chinese astronomical methods for calculating the movements of the sun and moon. Ancient observers noted that the moon moves faster than the sun, completing a full celestial circuit in approximately 27 days (known as the "sidereal month"). However, a complete lunar phase cycle (called the "synodic month") actually requires slightly more than 29 days. During these 29 days, while the sun progresses only 29 degrees along its path, the moon completes its 365-degree celestial circuit plus an additional 22 degrees, yet paradoxically ends up 7 degrees behind the sun.

The Yin-Yang specialists (ancient calendar astronomers) observed that the irregular speeds of solar and lunar motion necessitated alternating long months of 30 days with short months of 29 days. While a solar year should theoretically be 365¼ days (365 days and 6 hours), accounting for precession and other factors reduced this to 360 days. Subtracting the 6 days missing from six short months left only 354 days per year—11 days and 6 hours shorter than the standard year. This accumulated discrepancy led to the intercalary month system.

Ancient astronomers determined months by observing the Big Dipper's celestial orientation (called "Doujian"), with intercalary months lacking corresponding solar terms. They used the "Eight Nodes" (key solar terms from the 24-term system) to calculate remaining days and establish intercalary months. This embodies the classical calendrical principle described as "establishing the beginning, correcting the middle, and calculating the remainder at the end."

The so-called "celestial degrees" system marked the sun and moon's daily positions relative to the 28 lunar mansions as angular measurements. Stellar motion patterns ("zhi" meaning regulation) served to standardize solar-lunar movements. A "hou" (climate cycle) represented five-day periods verified through observing weather patterns and botanical changes.

The text emphasizes that physicians must understand this astronomical knowledge, as ignorance of annual climatic variations and Qi (vital energy) fluctuations would render accurate diagnosis impossible. As the Book of Documents states, only by adjusting seasons through intercalary months can the true length of the year be properly determined.

Wang Bing, a Tang dynasty medical scholar, noted in his commentary on the Yellow Emperor's Inner Canon that if one cannot fully comprehend the cyclical patterns of Qi movement in heaven and earth, it becomes even more difficult to thoroughly understand the root causes of human diseases—a profound teaching left by ancient sages.

Regarding the temporal patterns of the Six Qi (wind, cold, summer heat, dampness, dryness, and fire, the six climatic factors): the interaction of Yin and Yang creates six phases, leading to the alternation of cold and heat. The movement of the sun and moon shapes the seasonal climatic changes. The Yellow Emperor's Inner Canon states that to the right of the sunrise position (the Mao position, due east) lies the domain of the Sovereign Fire (Shaoyin heat), followed in sequence by the Ministerial Fire (Shaoyang summer heat), Earth Qi (Taiyin dampness), Metal Qi (Yangming dryness), Water Qi (Taiyang cold), and Wood Qi (Jueyin wind). Each of these Six Qi governs a specific period.

Specifically:

• The Wood Qi governs the first phase, beginning from the mid-climate day of the twelfth lunar month (Greater Cold).
• The Sovereign Fire governs the second phase, starting from the mid-climate day of the second lunar month (Spring Equinox).
• The Ministerial Fire governs the third phase, from the mid-climate day of the fourth lunar month (Grain Full).
• The Earth Qi governs the fourth phase, from the mid-climate day of the sixth lunar month (Greater Heat).
• The Metal Qi governs the fifth phase, from the mid-climate day of the eighth lunar month (Autumn Equinox).
• The Water Qi governs the sixth phase, from the mid-climate day of the tenth lunar month (Lesser Snow).

Each phase lasts 60 days and 87.5 ke (an ancient time unit, with 100 ke making a full day and night), totaling 365 days and 25 ke—a complete year. In leap years or months with fewer days, adjustments are made based on the actual solar terms. This cyclical movement of the Six Qi is called the "Host Qi," representing the relatively fixed patterns of Yin and Yang on earth, manifesting as regular climatic conditions such as cold, heat, dryness, dampness, wind, and fire.

Additionally, there is the "Guest Qi" system, which refers to the annually rotating influences of the Sitian (the dominant climate of the first half of the year), Zaiquan (the dominant climate of the second half), and the four transitional Jian Qi (intermediate climates). These act like celestial envoys, constantly shifting. When Host Qi and Guest Qi interact, if the Guest Qi is strong, the climate follows its lead; if the Host Qi is strong, it disrupts the usual patterns. In both cases, the result is a one-sided dominance of climate rather than mutual balance.

Regarding the division of day and night: the twelve two-hour periods of a day should be evenly distributed. Ancient timekeeping used water clocks (louke), dividing a day into 100 ke. However, seasonal variations cause unequal lengths of day and night—at the winter solstice, the day is shorter by 20 ke compared to the night, while the opposite occurs at the summer solstice. The spring and autumn equinoxes have balanced day and night. This method originates from the Yellow Emperor's Inner Canon's "Discourse on the Subtle Principles of the Six Qi," using water-clock measurements to verify time, which is more precise than relying solely on sundial observations.

The ancients measured time using water clocks with floating indicators. Water poured into a bronze vessel caused a marked arrow to descend, dividing a full day-night cycle into one hundred ke (an ancient time unit). This allowed precise timekeeping regardless of sunlight variations. The year was divided into six qi (climatic phases: wind, heat, summer-heat, dampness, dryness, and cold), each governing 60 days and 87.5 ke. Thus the transition between climatic phases might vary slightly in timing. Diagrams illustrate this: while the summer solstice alters day-night ke distribution, the total hundred-ke cycle remains constant, as do the fixed ke counts for qi transitions.

Specifically, in a Jiazi year (the first of the sexagenary cycle), the initial qi phase begins at the first ke mark and ends at 87.5 ke (midnight). The second qi runs from 87.6 ke to 75 ke (the fourth watch of Xu hour), and so forth until six qi complete the annual cycle. By the Wuchen year, the initial qi returns to the first ke, completing a four-year minor cycle. Years of Shen, Zi, and Chen share identical starting ke for initial qi (called the "triple conjunction"), with other year groups following similar patterns. Fifteen minor cycles (60 years) form one major cycle.

Regarding the "branch-root" theory: The three yin and three yang (Greater Yin, Lesser Yin, Reverting Yin; Greater Yang, Lesser Yang, Bright Yang) represent heaven's six qi as "branches," while the Five Phases (Water, Fire, Wood, Metal, Earth) form earth's foundation as "roots." During the processes of generation, growth, transformation, harvest, and storage, yang contains yin and yin contains yang. Their dynamic interactions and alternating ascendancy create endless variations. This constitutes the fundamental pattern of celestial-terrestrial climatic movement.

The "Suwen Rushi Yunqi Lun'ao" passage discusses the operational patterns of Yin-Yang and the Five Phases (Wood, Fire, Earth, Metal, Water) with the six climatic energies (wind, cold, summerheat, dampness, dryness, and fire). The generation and transformation of all things in heaven and earth follow natural laws that cannot be arbitrarily altered by human intervention.

Yin and Yang operate differently: Yang Qi moves sequentially from Taiyang (peak strength) to Shaoyang (secondary strength), while Yin Qi moves inversely from Shaoyin (initial emergence) to Taiyin (peak strength). This mirrors the patterns revealed in Yijing divination. For example:

• Sovereign Fire (heart fire) corresponds to the noon hour (wushi), when Yin Qi first begins to emerge. Though fire is inherently hot, the nascent Yin energy at this time classifies Sovereign Fire as Shaoyin.
• Cold Water corresponds to midnight (zishi), when Yang Qi begins its emergence. While water is fundamentally cold, the budding Yang energy here classifies it as Taiyang.
• Damp Earth aligns with the southwest wei position (late summer season), following the noon hour, hence its designation as Taiyin.
• Ministerial Fire corresponds to the yinshi period (3-5 AM), following the choushi hour (1-3 AM), thus classified as Shaoyang.
• Wood corresponds to the eastern direction and the liver in humans. Though the liver resides in the Yin region below the diaphragm, wood requires Yin nourishment for growth, classifying it as Jueyin.
• Metal corresponds to the western direction and the lungs in humans. Though positioned in the Yang region above the diaphragm, metal requires Yang energy to function effectively, classifying it as Yangming.

These principles determine the distinctive characteristics and root-branch relationships of the six climatic energies.

The subsequent discussion on "generation numbers" explains how heaven's height and earth's thickness, the six energies' cyclical formation of seasons, and the Five Phases' transformations generating myriad beings constitute profound, unfathomable patterns. Sages observed these natural phenomena and codified their principles in classical texts. Using these laws to deduce the mechanisms of transformation invariably relies on numerical principles.

This scripture explains the correspondence between the Five Phases (Water, Fire, Wood, Metal, Earth) and the principles of Yin-Yang with directional orientations. Water corresponds to the North and the number one, because the hour of zi (midnight) in the North marks the initial emergence of Yang qi - one being a Yang number. Fire corresponds to the South and the number two, as the hour of wu (noon) in the South witnesses the first stirrings of Yin qi - two being a Yin number. Wood corresponds to the East and the number three, the Eastern direction being Yang in nature, and three as an odd number also belonging to Yang. Metal corresponds to the West and the number four, the Western direction being Yin in nature, and four as an even number belonging to Yin. Earth corresponds to the center and the number five - five being an odd Yang number - and aligns with the Southwest direction and late summer.

On a deeper level, Water represents the source of all things, being the first element to appear before Heaven and Earth separated. When Water accumulates into form, it contains both Yin and Yang qi, enabling the generation of all beings. Bitter flavors signify Fire's presence, while sweet tastes manifest Earth's nature - extreme sweetness ultimately returns to plainness. The human body follows this same pattern: first manifesting the paired kidneys - the left kidney corresponding to Water and the right kidney to Fire (the Gate of Life, mingmen), where Fire depends on Water for its manifestation. Though fruits and plants vary in size, their internal structures all contain the union of Yin and Yang, mirroring human kidneys. All things require the conjunction of Yin and Yang for growth and transformation - through this union emerges the cyclical process of spring's generation and autumn's harvest, hence Wood being three and Metal four.

While Water, Fire, Wood, and Metal each possess their distinct orientations and characteristics, all depend on Earth for their completion. Earth resides at the center while simultaneously distributing itself among the four directions, corresponding to the four seasons and, in humans, to the four limbs. Metal, Wood, Water, and Fire all require Earth's function to fulfill their purposes - Earth's number five thus integrates and governs the other four phases.

This passage explains the principles and applications of the generative numbers in the Five Phases (Wuxing). Each of the Five Phases (Water, Fire, Wood, Metal, Earth) corresponds to a generative number: Water-one, Fire-two, Wood-three, Metal-four, Earth-five. When these generative numbers reach their culmination, they transform into their respective completion numbers: Water-six, Fire-seven, Wood-eight, Metal-nine, with Earth uniquely achieving transformation without needing to reach ten.

Through the union of the generative and completion numbers of the Five Phases, the Great Expansion Number (Dayan zhi shu, the fifty-number system used in ancient divination) is formed—a numerical pattern from which nothing in creation can escape. Within the framework of the three Yin and three Yang (the six states of Qi transformation in Chinese medicine), normal transformation (zhenghua) follows the generative number of the original Qi, while corresponding transformation (duihua) adheres to the completion number of the manifest Qi.

In the cyclical patterns of the Five Movements (Wuyun, the operational changes of the Five Phases), when Qi is in excess (taiguo), the completion numbers are used for calculation; when Qi is deficient (buji), the generative numbers are applied. By observing the variations in these generative and transformative numbers, one can predict the rise and fall of governmental decrees, climatic changes, as well as the relationships of conquest and retaliation (shengfu) in natural cycles. All these demonstrate the practical applications of Five Phases numerology.

The celestial stems and earthly branches (Tiangan Dizhi) interweave across the eight directions, with each cardinal point corresponding to specific constellations. These stellar formations encircle the heavens, each governing distinct terrestrial regions. Ancient astrologers recorded these cosmic patterns by observing celestial phenomena and atmospheric energies, passing down knowledge that requires dedicated study to comprehend its profound mysteries.

The celestial dome divides into five atmospheric movements (Qi), while the earth distributes the Five Phases (Wood, Fire, Earth, Metal, Water). These five energies flow through the twenty-eight lunar mansions, descending to align with terrestrial orientations, forming the complete "Five Movements" system:

1. The Cinnabar Heaven's Qi (red fire energy) passes through the Ox, Girl, Legs, and Wall constellations, corresponding to the Wu-Gui earthly branches, forming the Fire Movement;

2. The Golden Heaven's Qi (yellow earth energy) traverses the Heart, Tail, Horn, and Chariot constellations, aligning with the Jia-Si branches, creating the Earth Movement;

3. The Plain Heaven's Qi (white metal energy) flows through the Neck, Root, Hairy Head, and Net constellations, matching the Yi-Geng branches, establishing the Metal Movement;

4. The Mysterious Heaven's Qi (black water energy) courses through the Extended Net, Wings, Bond, and Stomach constellations, corresponding to the Bing-Xin branches, constituting the Water Movement;

5. The Azure Heaven's Qi (blue-green wood energy) moves through the Rooftop, Chamber, Willow, and Ghost constellations, aligning with the Ding-Ren branches, forming the Wood Movement.

These five energetic movements interrelate with the twenty-eight mansions and twelve earthly branches, creating a comprehensive Five Movements cosmology. Among them, the Xu position represents the Celestial Gate (northwest Qian position), while the Si position signifies the Earthly Door (southeast Xun position). The fourteen constellations from the Room to Net mansions govern yang and daylight, while the fourteen from Hairy Head to Heart mansions govern yin and nighttime, together completing the daily cycle.

Regarding the correspondence between the Five Tones (Gong, Shang, Jue, Zhi, Yu) and the Five Movements:

• Earth Movement corresponds to Gong tone, Metal to Shang, Wood to Jue, Fire to Zhi, and Water to Yu.
• Yang years (stemmed by Jia, Bing, Wu, Geng, Ren) are termed "Tai" (supreme), while Yin years (Yi, Ding, Ji, Xin, Gui) are called "Shao" (lesser).
• The Jue tone symbolizes yang energy's initial stirring (corresponding to Ding-Ren Wood Movement years), the Zhi tone represents development's zenith (Wu-Gui Fire Movement), the Shang tone manifests metal's unyielding nature (Yi-Geng Metal Movement), the Yu tone signifies yang's revival and growth (Bing-Xin Water Movement), while the Gong tone embodies harmonizing Dao (Jia-Ji Earth Movement), governing all directions.

This scripture explains the ancient method of calculating the Five Movements (the cyclical patterns of the Five Phases' Qi - Wood, Fire, Earth, Metal, Water) using the Heavenly Stems and Earthly Branches. The ancients observed five colored Qi energies in heaven and earth (golden-yellow, pure white, mysterious black, azure-green, and cinnabar-red), corresponding respectively to the Five Phases of Earth, Metal, Water, Wood, and Fire. These Qi energies dominate celestial and terrestrial operations in different years.

In the Jia-Ji years (1st & 6th stems), the horizontal flow manifests as yellow Earth Qi, hence these years belong to Earth movement. Yi-Geng years (2nd & 7th stems) show white Metal Qi, indicating Metal movement. Bing-Xin years (3rd & 8th stems) display black Water Qi, marking Water movement. Ding-Ren years (4th & 9th stems) manifest green Wood Qi, signifying Wood movement. Wu-Gui years (5th & 10th stems) reveal red Fire Qi, designating Fire movement. These correspondences originated from celestial observations.

The specific calculation method examines the Heavenly Stem of each year's first month: Jia-Ji years begin with Bing-Yin month (Bing belongs to Fire), where Fire generates Earth, hence their Earth movement. Yi-Geng years start with Wu-Yin month (Wu belongs to Earth), where Earth generates Metal, thus Metal movement. Bing-Xin years commence with Geng-Yin month (Geng belongs to Metal), where Metal generates Water, resulting in Water movement. Ding-Ren years open with Ren-Yin month (Ren belongs to Water), where Water generates Wood, producing Wood movement. Wu-Gui years initiate with Jia-Yin month (Jia belongs to Wood), where Wood generates Fire, creating Fire movement. This cyclical pattern interconnects like the movements of sun and moon.

The twelve Earthly Branches correspond to twelve months: Yin for the first month, Mao for the second, and so forth. Different years begin with distinct Heavenly Stems: Jia-Ji years start with Bing-Yin, Yi-Geng with Wu-Yin, Bing-Xin with Geng-Yin, Ding-Ren with Ren-Yin, and Wu-Gui with Jia-Yin. This monthly stem-branch correspondence (known as Yuejian) forms the foundation for calculating the Five Movements.

This scripture primarily discusses the cosmic operational principles in ancient Daoism, including the Heavenly Stems and Earthly Branches, the Five Phases (Wuxing) and Six Qi.

Regarding the calculation methods of the Heavenly Stems and Earthly Branches: In years like Renyin or Wugui, the first lunar month begins counting from Jiayin. Calculations start with the Jiazi year as the baseline, following the sequence of the sixty Jiazi cycles in order. For instance, Bingyin ranks first, Wuyin second, and so on in continuous cycles. After completing one full cycle of the sixty Jiazi with their corresponding Five Phases (Nayin), the sequence begins anew. The same Heavenly Stem correspondence applies when calculating time periods. In the Five Movements cycle, during Yin years (years of deficient energy), if the Heavenly Stem of the day coincides with the year's stem at the Major Cold solar term (Dahan), it's called "Gan De Fu" (Stem-Virtue Accord), indicating balanced climatic conditions without excess or deficiency.

Concerning the Six Qi of Heaven and Earth: The qi of Heaven and Earth interact in six stages, giving rise to all phenomena. The Five Phases (Wood, Fire, Earth, Metal, Water) represent the functional manifestations of qi, distributed across the twelve Earthly Branches. Heavenly qi descends while Earthly qi ascends, jointly fulfilling the transformative functions of the Five Phases. All growth depends on this harmonious interaction between celestial and terrestrial qi. Earthly qi remains relatively stable and constant, while Heavenly qi is perpetually in motion.

The Six Qi share the same origin but manifest differently: Heavenly qi begins with Lesser Yin (Shaoyin) and ends with Terminal Yin (Jueyin), whereas Earthly qi starts with Terminal Yin Wood (Jueyin mu) and concludes with Greater Yang Water (Taiyang shui). These differences arise from interactions between the Heavenly True Qi (Tianzhen zhi qi) and Earthly Primordial Qi (Kunyuan zhi qi). The specific correspondences are: Lesser Yin corresponds to Zi-Wu, Greater Yin (Taiyin) to Chou-Wei, Lesser Yang (Shaoyang) to Yin-Shen, Bright Yang (Yangming) to Mao-You, Greater Yang (Taiyang) to Chen-Xu, and Terminal Yin (Jueyin) to Si-Hai.

The six manifestations of Earthly qi correspond to the seasons: Terminal Yin Wind-Wood (Jueyin fengmu) governs spring, while Lesser Yin Sovereign Fire (Shaoyin junhuo) presides over late spring and early summer. These correspondences form the fundamental patterns of Heaven-Earth qi circulation.

This passage explains the operational patterns of "host qi" (主气) in the theory of Five Movements and Six Qi (五运六气) in traditional Chinese medicine. The interaction between the celestial Yin and Yang energies creates the seasonal climate variations throughout the year.

Earthly qi remains relatively stable, circulating in fixed positions to establish the regular climatic patterns: spring warmth, summer heat, autumn coolness, and winter cold. The year divides into six periods, each governed by a distinct host qi:

The first qi is Jueyin Wood qi (属风, associated with wind), presiding over approximately 60 days from the Beginning of Spring (立春) to before the Spring Equinox (春分), when easterly winds begin to prevail. The second qi is Shaoyin Sovereign Fire (属温热, associated with gentle warmth), governing about 60 days after the Spring Equinox, bringing mild and pleasant weather. The third qi is Shaoyang Ministerial Fire (属暑热, associated with summer heat), controlling roughly 30 days before and after the Summer Solstice (夏至), when temperatures peak. The fourth qi is Taiyin Damp Earth, managing about 60 days from the Beginning of Autumn (立秋) to before the Autumn Equinox (秋分), characterized by rainy and humid conditions. The fifth qi is Yangming Dry Metal (属凉燥, associated with cool dryness), overseeing approximately 60 days after the Autumn Equinox as the climate turns crisp and arid. The sixth qi is Taiyang Cold Water (属寒冷, associated with winter chill), dominating the winter season.

These six host qi circulate according to the Five Phases (五行) generative sequence: Wood generates Fire (Jueyin produces Shaoyin), Fire generates Earth (Shaoyin produces Taiyin), Earth generates Metal (Taiyin produces Yangming), Metal generates Water (Yangming produces Taiyang), and Water regenerates Wood, completing the cycle. Every five years forms one complete cycle, while six years allow each qi to govern a full year, creating the coordinated pattern of "Five Movements and Six Qi." Thirty years constitute one epoch (纪), and sixty years complete a grand cycle, corresponding to the celestial stems and earthly branches system.

This climatic operational model, called "host qi," represents the fixed annual climate pattern that interacts with the variable "guest qi" (客气) to influence actual yearly weather conditions. Ancient practitioners determined the transitional points between host qi periods by observing the orientation of the Big Dipper's handle (斗建).

This passage explains the correspondence between the "Six Qi" (wind, cold, summer-heat, dampness, dryness, and fire) in ancient Chinese medical cosmology and the Earthly Branches (twelve two-hour periods), as well as their influence on seasonal climate changes.

When clear Qi circulates, all things become dry. Water Qi dominates the approximately thirty days before and after the winter solstice, from when the Big Dipper points directly at the Hai position to the middle of the Chou position, during which cold Qi prevails. The six climatic forces take turns dominating, forming an annual cycle that rotates according to fixed patterns each year.

The six Qi operate in four directions (upper, lower, left, and right), while the twelve Earthly Branches govern different seasonal periods. The upper and lower Qi respond to each other, creating variations of cold, summer-heat, dryness, dampness, wind, and fire. These differ from regular seasonal climates because their modes of mutual influence vary.

The specific correspondences are:

Jueyin Wind-Wood corresponds to the Si and Hai periods. Since Wood Qi originates in Hai, Hai is its primary position while Si is its complementary position. Though Mao position inherently belongs to Wood, it's occupied here by Yangming Metal Qi.

Shaoyin Sovereign Fire corresponds to Zi and Wu periods. As Sovereign Fire symbolizes the emperor's position, it properly corresponds to the southern Li trigram position, making Wu the primary position and Zi the complementary position.

Taiyin Damp-Earth corresponds to Chou and Wei periods. Earth belongs to the center but resides temporarily in the southwestern Kun position, making Wei the primary position and Chou the complementary position.

Shaoyang Minister Fire corresponds to Yin and Shen periods. Minister Fire holds lower status than Sovereign Fire. Though Wu position belongs to Sovereign Fire, fire Qi originates in Yin, making Yin the primary position and Shen the complementary position.

Yangming Dryness-Metal corresponds to Mao and You periods. Since You belongs to the west which corresponds to Metal Qi, You is the primary position while Mao is the complementary position.

Taiyang Cold-Water corresponds to Chen and Xu periods. Though Zi position corresponds to Sovereign Fire, water Qi moves latently within earth (as Mencius said "water flows underground"). Xu represents the Heavenly Gate while Chen represents the Earthly Door, thus though water Qi belongs to Yin, it circulates hidden within Yang earth.

This passage explains the correspondence between celestial Yin-Yang movements and climatic variations in the ancient Chinese theory of Five Movements and Six Qi (Wuyun Liuqi). The years of Xu and Chen correspond respectively to two distinct Qi circulation patterns: "direct transformation" (zhenghua) and "counter transformation" (duihua), established according to the theories in Mysterious Pearl Secret Language.

The interaction between celestial Yin-Yang and the twelve Earthly Branches (Zi, Chou, Yin, Mao, etc.) forms an endless cyclical pattern. Calculations must be based on the year's celestial stem and earthly branch (ganzhi): counting to the position of the "Heavenly Ruler Qi" (governing the first half of the year), its counterpart is the "Earthly Minister Qi" (governing the second half), while the remaining four Qi distribute to the left and right sides. The first Qi after the Earthly Minister is called the "Initial Qi," governing the initial 60 days and 87.5 ke (an ancient time unit). The Heavenly Ruler corresponds to the "Third Qi," presiding over the first half of the year starting from the Great Cold solar term; the Earthly Minister corresponds to the "Sixth Qi," governing the second half from the Great Heat solar term.

The Lesser Yin (one of the Six Qi) begins its clockwise rotation from the Zi position, typically manifesting as excessive Qi flow. The waxing and waning of the Heavenly Ruler Qi must be analyzed in conjunction with the Ten Celestial Stems, aligning with the principles in the Chart of Qi Activation by Ten Stems. Hence, the Yellow Emperor's Inner Canon states: in a year's cycle, the first half is governed by celestial Qi, while the latter half is dominated by terrestrial Qi.

The Heavenly Ruler Qi is called the "Upper Position," located in the south. The observer must stand facing north, where left and right directions correspond to west and east respectively. The Earthly Minister Qi is termed the "Lower Position," situated in the north, requiring the observer to face south, reversing the left-right orientation to east and west. This directional shift is detailed in the Great Treatise on the Subtle Principles of Six Qi, where the description "to the right of Lesser Yang, Yang Ming governs" is based precisely on this south-facing perspective.

Finally, the passage discusses the formation principle of "Celestial Conformity" (tianfu, when the annual Qi cycle aligns with the Heavenly Ruler Qi): when Yin and Yang energies intersect and mirror each other vertically, it generates abnormal phenomena like excessive Qi flow or recurrent stagnation. The Heavenly Ruler Qi governs celestial movements, the annual Qi cycle regulates the transformation of all things between heaven and earth, while the Earthly Minister Qi directs terrestrial changes. When these three harmoniously resonate within a year, it creates the special phenomenon of a Celestial Conformity year.

The Suwen Rushi Yunqi Lun'ao explains that even when climatic qi flows normally without the usual cycles of mutual conquest and retaliation, diseases may still manifest with varying degrees of severity and urgency. The term "Heavenly Conformity" (Tianfu) refers to the alignment between the qi governing the year (Si Tian Zhi Qi) and the central movement qi (Zhong Yun Zhi Qi) from the Five Movements and Six Qi system, occurring in twelve specific years. Among these twelve, when the annual qi also harmonizes with both the Twelve Pitch Standards (ancient musical tones) and the Five Phases (Wuxing), it is called "Great Unity Heavenly Conformity" (Taiyi Tianfu). "Great Unity" (Taiyi) is an honorific title encompassing three layers of meaning: celestial convergence, annual convergence, and movement convergence. Within this framework, four years—regardless of being yin or yang years—are designated as Heavenly Conformity. Hence, the classic states: Heavenly Conformity acts like an enforcer, Annual Position like an executor, and Great Unity Heavenly Conformity like a noble authority. When pathogenic qi harms the body, diseases corresponding to the enforcer strike swiftly and dangerously, those tied to the executor manifest slowly yet persistently, while ailments linked to the noble authority arise suddenly and fatally—reflecting the varying depths of qi influence.

Annual Convergence (Sui Hui) occurs when the annual stem (Heavenly Stems) governing the movement aligns with the Five Phases of the year's earthly branch (Twelve Pitch Standards), irrespective of yin or yang years. The key criterion is the central month of each season, specifically the hours of Zi, Wu, Mao, and You. Earth lacks a fixed position, dispersing across the last 18 days of each season's end, so Chen, Xu, Chou, and Wei also qualify as Annual Convergence, totaling eight years. Additionally, four other years—Yang years Ren Yin (Wood) and Geng Shen (Metal), and Yin years Gui Si (Fire) and Xin Hai (Water)—though exhibiting Five Phases convergence with the year's branch, are not classified as Annual Convergence because they deviate from the seasonal midpoint. However, the two Yin years Gui Si and Xin Hai, while excluded from Annual Convergence, still demonstrate balanced qi due to the harmonious interplay of upper and lower Five Phases. In such years of balanced qi (Pingqi), the growth of all things and pulse patterns follow their natural timing without premature or delayed manifestations.

Among the eight years of Annual Convergence, four overlap with the qi of the celestial governor, already falling under the category of Great Unity Heavenly Conformity. Other related details have been addressed in earlier discussions.

On the patterns of "Tong Tianfu" and "Tong Suihui": The six climatic cycles alternately influence heaven and earth, with the transformations of Yin-Yang causing either excessive or insufficient climatic conditions. Previous texts have recorded concepts like Tianfu (Heavenly Tallies) and Suihui (Yearly Confluence). When the five cyclical Qi movements coincide with terrestrial Qi (specifically the "Qi in the springs"), Yang years are termed "Tong Tianfu" (Heavenly Accordance), while Yin years are called "Tong Suihui" (Yearly Meeting). Within the sixty-year cycle, these patterns manifest as: four years of Taiyi Tianfu (Grand Unity Heavenly Tally), twelve years of Tianfu, eight years of Suihui, six years of Tong Tianfu, and six years of Tong Suihui. Calculated separately they total twenty-six years, but combined reckoning yields twenty-seven. The classical texts' mention of twenty-four years represents a rounded figure requiring careful discernment. Understanding these patterns enables prediction of climatic variations, disease severity, and life expectancy.

Regarding the pulse diagnosis principles of Nan-Zheng (Southern Administration) and Bei-Zheng (Northern Administration): Among the five cyclical movements, the Jia-Ji earth phase years constitute "Nan-Zheng" (the sovereign position), as earth occupies the center, symbolizing a ruler facing south to govern. Other years (Yi, Bing, Ding, Wu, Geng, Xin, Ren, Gui) belong to "Bei-Zheng" (ministerial position), representing subjects receiving mandates while facing north. In pulse diagnosis: during Nan-Zheng years (Jia-Ji), the Cun pulse (distal position) corresponds to the southern orientation (radial side of wrist) while the Chi pulse (proximal position) aligns with northern orientation (ulnar side); Bei-Zheng years show the opposite configuration. When Shaoyin governs heaven (first half of year), Nan-Zheng years exhibit diminished Cun pulses while Bei-Zheng years show weakened Chi pulses; the pattern reverses when Shaoyin governs the springs (second half). This mirrors how men facing south typically show weaker Chi pulses and women facing north display stronger Chi pulses—a manifestation of Yin Qi's descending nature. The six climatic positions remain fixed: Shaoyin occupies the center, Jueyin the right, and Taiyin the left. Reverse-hand pulse examination makes Yin Qi's sinking characteristics more pronounced.

(Note: "Governs heaven" refers to the dominant Qi of the year's first half; "governs springs" denotes the second half's dominant Qi; "diminished pulse" indicates barely perceptible weakening; "Cun" and "Chi" respectively designate the proximal and distal segments of the radial artery at the wrist.)

This passage explains the method of determining life and death through pulse diagnosis. The phrase "deep becomes floating, thin becomes large" refers to abnormal pulse manifestations: when a pulse that should be deep (requiring firm pressure to detect) becomes floating (detectable with light touch), or when a normally thin and weak pulse becomes broad and strong. Classical texts state that if the cun pulse (wrist position) and chi pulse (elbow position) exhibit opposite characteristics, or when yin and yang pulses become disordered and intertwined, these are all signs of grave danger.

In diagnosis, one must first determine the year's corresponding Five Phases and Six Qi (the ancient Chinese medical theory of climatic cycles), then observe the pulse changes in both left and right hands. Only then can one assess the auspicious or ominous nature of the disease. The key lies in carefully discerning the pulse's abnormal manifestations and analyzing the specific patterns of yin-yang interaction to accurately predict the subtle signs of life and death.

This content comes from the middle volume of Suwen Rushi Yunqi Lun'ao (The Profound Theory of Qi Cycles in the Plain Questions), primarily discussing how to determine disease prognosis through pulse diagnosis.

This scripture primarily discusses the operational patterns of the Five Phases (Wuxing) energies (Metal, Wood, Water, Fire, Earth) within heaven and earth, and their influence on the growth of all things.

Climatic phenomena such as cold, heat, dryness, dampness, and wind govern the annual cycles of growth, transformation, harvest, and storage in all living things. These patterns manifest not only across entire years but also in fleeting moments, each containing the movement of Five Phases energies. They appear not just in large-scale phenomena but even in the most minute details, all bearing the transformations of the Five Phases.

In their operation, the Five Phases energies alternate between excessive (too strong) and deficient (too weak) states, taking turns dominating annual climatic changes. These fluctuations correspond with celestial phenomena above (affecting the movements of the five planets) and geographical patterns below (influencing the reproduction of all creatures). The annual variations in grains, fruits, flavors, and colors all follow this principle, differing only in their degree of maturity or intensity.

Specifically:

• In yang years (years of vigorous qi movement), the Five Phases energies become excessively strong, producing the "dominant transformation" phenomenon (e.g., when Wood qi becomes too strong, it suppresses Metal qi, creating "Wood dominating Metal transformation")
• In yin years (years of weak qi movement), the Five Phases energies become insufficient, producing the "assimilated transformation" phenomenon (e.g., when Wood qi is deficient, Metal qi comes to assimilate it, creating "Wood assimilated by Metal transformation")

When the annual governing qi (the celestial qi presiding over that year's weather) encounters the Five Phases movements, they interact through either harmonious or conflicting relationships. When the five energies achieve proper balance, they don't encroach upon each other. The thirty yang years of excessive movement include examples like:

• The six ren years (Great Jue) encountering zi, wu, yin, or shen years - when two Fire elements govern heaven, the Wood movement becomes constrained
• The six wu years (Great Zhi) encountering cold Water governing heaven - the Fire movement becomes suppressed and transforms into balanced qi

These patterns of transformation constitute the fundamental laws governing the operation of all things between heaven and earth.

This passage explains the ancient theory of "Five Cycles and Six Qi" (五运六气) used to predict annual climate patterns through the Heavenly Stems and Earthly Branches system. In modern terms:

The ten Heavenly Stems (Jia, Yi, Bing, Ding, Wu, Ji, Geng, Xin, Ren, Gui) are divided into Yang years (excessive years: Jia, Bing, Wu, Geng, Ren) and Yin years (deficient years: Yi, Ding, Ji, Xin, Gui). Each Stem governs six years, forming a complete sixty-year cycle.

For example, Jia years (Six Jia) correspond to the Gong musical note and exhibit excessive Earth movement (土运太过), while Geng years (Six Geng) correspond to the Shang note with excessive Metal movement (金运太过). When these occur during Zi-Wu or Yin-Shen years (Fire-dominated celestial periods), Fire overcomes Metal, suppressing the excessive Metal movement to create a balanced year.

Yin years present more complexity: Ding years (Six Ding) correspond to Shaojiao with deficient Wood movement (木运不及). During Si-Hai years (Wood-dominated celestial periods), Wood receives support; during Mao-You years (Metal-dominated periods), Metal overwhelms weak Wood; during Chou-Wei years (Earth-dominated periods), Earth counteracts the weakened force. Other Yin years follow similar patterns based on the relative strength of that year's celestial Qi.

The term "upper" refers to the celestial governing Qi. When the Five Movements (Wood, Fire, Earth, Metal, Water) interact with celestial Qi, four scenarios may occur: celestial Qi restraining the annual movement, annual movement counter-restraining celestial Qi, excessive annual movement overpowering its conquered element, or deficient annual movement yielding to restraint. Special combinations like Taiyi Celestial Accord (太一天符) and Annual Convergence (岁会) require case-by-case analysis.

Finally, the text notes that Sovereign Fire (君火), Ministerial Fire (相火), and Cold Water (寒水) typically govern Yang years as celestial Qi, while Damp Earth (湿土), Dry Metal (燥金), and Wind Wood (风木) often govern Yin years. Through this systematic pairing of Heavenly Stems and Earthly Branches, practitioners can deduce each year's general climatic characteristics and transformation patterns.

This passage explains the concept of "balanced Qi" (平气) in traditional Chinese medicine's theory of Five Movements and Six Qi (五运六气), along with methods for its determination. "Balanced Qi" refers to a year when climatic conditions are neither excessively strong (大过) nor deficient (不及), maintaining a state of equilibrium.

Determining balanced Qi involves several factors: First is the interaction between heavenly stems and earthly branches. For instance, in the Xinhai year (辛亥), Xin belongs to yin-water movement while Hai corresponds to northern water - their harmony creates balanced Qi. Similarly, in the Guisi year (癸巳), Gui represents yin-fire movement and Si corresponds to southern fire, their conjunction also forms balanced Qi. Secondly, one examines the stem-branch combinations during seasonal transitions. For example, if the day stem harmonizes with the year stem (like encountering a Ren day in a Ding year) during the Great Cold solar term's initial Qi transition, this is called "stem virtue correspondence" (干德符), another form of balanced Qi. Additionally, in yin years, balanced Qi may emerge when the month stem harmonizes with the year stem or when matching heavenly stems appear.

The text further enumerates three states corresponding to the Five Phases (五行 - Wood, Fire, Earth, Metal, Water): excessive (太过), deficient (不及), and balanced. For wood movement, excess is termed "flourishing growth" (发生), deficiency as "withered harmony" (委和), and balance as "spreading harmony" (敷和). Fire movement's excess is called "blazing radiance" (赫曦), deficiency as "hidden brightness" (伏明), and balance as "ascending brightness" (升明). Earth movement's excess is "mounded abundance" (敦阜) while deficiency is "humble observation" (卑监).

It's important to note that balanced Qi cannot be predetermined; its determination must consider specific temporal factors like the year's hour and day stems. These classifications serve as frameworks for understanding climatic patterns, requiring contextual analysis in practical application.

This passage explains the classification and cyclical patterns of annual climatic characteristics in the Five Movements and Six Qi theory.

First, it describes the naming conventions for different years' climatic features: A year with balanced Earth movement is called "Beihua" (harmonious qi), while excessive Metal movement years are termed "Jiancheng" and deficient ones "Congge." Balanced Metal years are called "Shenping." Excessive Water movement years are labeled "Liuyan," deficient ones "Heliu," and balanced Water years "Shunjing." These classifications serve to document climatic characteristics.

When climatic conditions are harmonious, it represents a normal state without excess or deficiency. However, note that some years classified as excessive may become balanced if restrained by the Controller Heaven Qi (which governs the first half of the year). For instance, a "Hexi" year (excessive Fire movement) encountering cold Water as Controller Heaven, or a "Jiancheng" year (excessive Metal movement) meeting dual Fire as Controller Heaven—these situations can transform originally excessive years into balanced ones.

Regarding the annual operation of Five Movements: Earth's Six Qi govern the four seasons, while Heaven's Five Movements cycle through mutual generation. The Suwen primarily records this in the "Great Treatise on the Proper Order of the Six Periods," with each ten-year Controller Heaven cycle. Here we focus on internal Five Movement changes within each year.

Each of the Five Movements governs 73 days and 5 ke (ancient time units), totaling 365 days and 25 ke—exactly one year. Based on the Heavenly Stem calculation, the Grand Movement (governing the entire year) dominates while other four movements follow. For example, in a Wood-dominant year, it begins with "Da Jiao" (excessive Wood movement), then follows the generation sequence: Wood generates Fire (Shao Zhi), Fire generates Earth (Da Gong), Earth generates Metal (Shao Shang), Metal generates Water (Da Yu). If the year's dominant movement is "Shao Gong" (deficient Earth movement), the calculation reverses: above Earth movement comes Fire (Da Zhi), above Fire comes Wood (Shao Jiao), so the main movement starts from "Shao Jiao."

The transition points between Five Movements are: Initial Wood movement begins at the Great Cold solar term; second Fire movement transitions 13 days after Spring Equinox; third Earth movement shifts 25 days after Grain Full; fourth Metal movement changes after Great Heat.

This passage primarily explains the calculation methods of "dominant qi" (主运) and "temporal qi" (客运) in ancient Chinese medical qi circulation theory, as well as the relationship between human meridians and celestial movements.

Regarding the calculation methods of Five Circulations and Six Qi: The annual dominant qi is divided into five phases, each transitioning at different times. For instance, in years of Shen, Zi, or Chen, the transition occurs at the Yin hour (3-5am) on the Great Cold day (大寒), while in Hai, Mao, or Wei years, it transitions at the Hai hour (9-11pm) on the same solar term. The Five Circulations follow the mutual generation sequence throughout the year, though classical texts don't detail specific applications. The temporal qi (客运) operates atop the dominant qi, following the same host-guest patterns as the Six Qi. The annual major circulation governs the year's qi movement, much like the Celestial Director (司天) qi governs the first half of the year.

Concerning the human meridian system: Humans are born through the harmonious blending of heaven and earth's Yin-Yang qi, embodying the generative forms of the Five Phases, with both Yin softness and Yang strength converging in one body. The zang-fu organs coordinate through meridians to form the foundation of vital activities. The Huangdi Neijing records that ancient sages studied human anatomy, differentiated organs, systematized meridians, and correlated the twelve primary meridians with the twelve months. These twelve meridians—comprising three Yin and three Yang channels in both hands and feet—externally course through limbs and internally connect organs, corresponding with natural celestial patterns. This theory of heaven-human correspondence (天人相应) manifests the holistic "Three Powers" (三才) worldview (heaven, earth, humanity), constituting a fundamental principle of traditional Chinese medicine.

(Note: "Celestial Director" [司天] is a qi circulation term denoting climatic patterns governing the year's first half. "Three Powers" [三才] refers to the unity of heaven, earth, and humanity. "Three Yin-Three Yang" [三阴三阳] classifies meridians into hand/leg triple Yin/Yang channels.)

In traditional Chinese medicine theory, the five zang organs (heart, liver, spleen, lungs, kidneys) belong to yin, while the six fu organs (gallbladder, stomach, small intestine, large intestine, bladder, and triple burner) belong to yang. The mutual pairing of yin and yang forms six corresponding relationships known as the "six harmonies."

Specifically:

The Shaoyin channel governs both the heart and kidneys. The heart belongs to the fire element, while the fundamental winter pulse manifestation of Shaoyin originates in the kidneys. The sovereign fire (heart fire) dominates during the noon hours (11 AM - 1 PM), transforming at midnight (11 PM - 1 AM). Thus the kidneys also fall under Shaoyin's governance. The kidneys are not metal-water organs—their right side belongs to the gate of life fire. As one of the five yin organs, they cannot be called yang water. Water qi (vital energy) follows kidney circulation, therefore the Taiyang channel's corresponding fu organs are the small intestine (hand Taiyang) and bladder (foot Taiyang).

The Taiyin channel governs the spleen and lungs. The spleen belongs to earth, with Taiyin's yin pulse manifesting in the lungs. Earth generates metal (lungs belong to metal), and the child follows the mother's position—hence the lungs are governed by Taiyin. Metal qi follows lung circulation, making the Yangming channel's corresponding fu organs the large intestine (hand Yangming) and stomach (foot Yangming).

The Jueyin channel governs the liver and pericardium. The liver belongs to wood, which generates fire (heart belongs to fire), and again the child follows the mother—thus the pericardium falls under Jueyin. Fire qi follows pericardium circulation, making the Shaoyang channel's corresponding fu organs the triple burner (hand Shaoyang) and gallbladder (foot Shaoyang).

Regarding hand and foot channels: hand channels begin from the hands, while foot channels originate from the feet. In terms of the twelve earthly branches time system, yin energy generates from noon (wu hour) and flows upward—hence hand channels. Yang energy generates from midnight (zi hour) and flows downward—hence foot channels. The heart, lungs and pericardium in the upper body belong to hand channels, while the liver, spleen and kidneys in the lower body belong to foot channels. This pairing of zang-fu organs with hand-foot channels forms a complete correspondence system.

Important clarification: Strictly speaking, the pericardium isn't classified as a zang organ, nor is the triple burner considered a fu organ. Classical texts describe the danzhong (pericardium region) as an official transmitting commands, governing joy and located between the breasts—the sea of qi. The heart acts as sovereign, while the triple burner serves as the waterway administrator. The triple burner has a name but no definite form—its upper part connects with the pericardium channel and its lower part with the right kidney, guiding various qi movements as the "messenger."

The principles of yin-yang can be extrapolated into tens, hundreds, thousands, even infinite variations. Yet their core remains singular. Though transformations appear limitless, by mastering the laws of yin-yang separation and union through systematic deduction, one can comprehend all their profound mysteries.

This scripture elucidates the cyclical patterns of transformation among the Five Phases (Wood, Fire, Earth, Metal, Water) operating between heaven and earth. The Qi movements of the Five Phases alternate between flourishing and declining, deficiency and excess, mutually influencing each other to form the seasonal rhythms of the year.

The text explains: When the Qi of any particular Phase becomes excessively strong, it arrives prematurely (prior to its celestial timing). This overbearing energy suppresses other Qi movements, making the oppressed Phases vulnerable to pathogenic influences. Conversely, when a Phase's Qi is insufficient, it arrives belatedly (after its celestial timing), leaving it in a weakened state susceptible to domination by other Phases. However, after being dominated, there follows a period of recovery (returning Qi), which can only manifest when the dominating Phase itself weakens.

Concrete examples illustrate this principle: When Wood Qi is deficient (in a "diminished Jue year"), Metal Qi comes to dominate it, whereupon Wood's "child" Fire Qi retaliates by using scorching heat to counter Metal. Similarly: deficient Fire brings Water to dominate it, but Earth retaliates; deficient Earth brings Wood to dominate it, but Metal retaliates; deficient Metal brings Fire to dominate it, but Water retaliates; deficient Water brings Earth to dominate it, but Wood retaliates. This demonstrates the principle of "domination and retaliation occurring in tandem."

The Mysterious Pearl Treatise distinguishes between the six climatic Qi (wind, cold, summer-heat, dampness, dryness, fire) having principal transformations (zheng hua) and corresponding transformations (dui hua). When principal Qi becomes excessively strong, it suppresses other Qi without facing retaliation; when corresponding Qi becomes too weak and gets suppressed, it generates counteractions. Severe suppression brings severe retaliation, mild suppression brings mild retaliation - these moments mark the birth of pathogenic influences. When the Five Phases' Qi cannot harmonize, these pathogenic influences invade the human body causing illness.

This domination-retaliation dynamic also operates in heaven-earth Qi: From the first to third seasonal nodes (first half of the year), celestial Qi dominates and easily generates suppression; from the fourth to final seasonal nodes (second half), terrestrial Qi dominates and easily generates retaliation. Suppression reaching its extreme begets retaliation, and after retaliation comes new suppression in an endless cycle. If retaliation occurs without new suppression following, it indicates the severance of generative Qi, which harms life.

The text emphasizes: When annual Qi becomes excessive, the suppressed Phases suffer pathogenic invasion; if the excessive Qi further bullies other Qi, then when annual Qi becomes deficient, it not only suffers domination from its usual suppressor but also gets bullied by the Phase it normally controls, ultimately falling victim to pathogenic invasion. This illustrates the subtle principle of "the bully ultimately suffering affliction," demonstrating the remarkably intricate relationships in Five Phases transformations.

This passage explains the ancient correlation between celestial phenomena and disease prediction. The ancients divided the sky into nine regions (Nine Palaces), each corresponding to specific terrestrial directions and provinces, governed by particular stellar deities. When the Five Movements (the cyclical operation of the Five Phases' Qi—Wood, Fire, Earth, Metal, Water) became deficient, calamities would manifest in their corresponding regions.

Specifically: When Wood movement is deficient (Shao Jiao year), disasters appear in the eastern Zhen position (Third Palace), governed by the Tian Chong star; when Fire movement is deficient (Shao Zhi year), the southern Li position (Ninth Palace) is affected, overseen by the Tian Ying star; when Earth movement is deficient (Shao Gong year), the central Fifth Palace suffers under Tian Qin's jurisdiction; when Metal movement is deficient (Shao Shang year), the western Dui position (Seventh Palace) experiences calamities ruled by Tian Zhu; when Water movement is deficient (Shao Yu year), the northern Kan position (First Palace) is afflicted, governed by Tian Peng.

The text further details the stellar deities corresponding to the Nine Palaces: Tian Peng governs Water, Tian Nei governs Earth, Tian Chong governs Wood, Tian Fu governs Wood, Tian Qin governs Earth, Tian Xin governs Metal, Tian Zhu governs Metal, Tian Ren governs Fire, and Tian Ying governs Fire. These stellar deities correlate with the nine ancient provinces: Ji, Yan, Qing, Xu, Yang, Jing, Yu, Liang, and Yong.

The concluding section describes the sixty-year climatic cycle (Guest Qi correlations), explaining how abnormal weather patterns in different years would trigger specific diseases. For instance, when Jueyin (initial phase) prevails with severe cold, epidemics become likely; when Shaoyin dominates, rheumatism and plagues emerge amid erratic temperature fluctuations. These climatic abnormalities would affect the growth cycles of corresponding insects, serving as omens for disease outbreaks.

This scripture explains the climatic patterns during the celestial governance of Lesser Yang Ministerial Fire (one of the Six Qi) in ancient Chinese medical theory of Five Movements and Six Qi. When Lesser Yang Ministerial Fire governs the heavens (dominating the first half of the year's climate):

During the Second Qi period (approximately May-June), extreme heat waves occur accompanied by thunderstorms and hailstorms, causing vegetation to wither and rivers to dry up. Occasional cool breezes may bring temporary relief, but scorching heat quickly returns.

The Third Qi period (around July-August) brings the peak of summer heat with pervasive humidity and frequent torrential rains mixed with hail. During this phase, feathered creatures (birds and other plumed beings) tend to thrive.

The text sequentially describes the climatic characteristics when the other five Qi govern the heavens: During Greater Yin Damp Earth's governance (September-October), continuous heavy rains alternate with fluctuating temperatures; when Yang Brightness Dry Metal rules (November), cool dry winds create sharp daily temperature variations; while Greater Cold Water dominates the earth phase (winter), piercing cold prevails though occasional unseasonable warmth may trigger the anomalous phenomenon of "hibernating insects emerging."

A key observation notes that these six climatic phases (Lesser Yang, Yang Brightness, etc.) rotate in dominance, each governing exactly 60 days and 87.5 ke (an ancient time unit). These cyclical variations overlay the standard four seasons, causing annual climatic deviations from seasonal norms—for instance, a theoretically warm spring might turn unseasonably cool due to suppression by that year's governing Qi.

The conclusion emphasizes cross-referencing with texts like The Secret Language of the Mysterious Pearl to predict climate-related disasters by comparing observed weather against theoretical calculations. When any Qi becomes excessively dominant, it inevitably triggers natural calamities.

This scripture primarily discusses how the cyclical transformations of Yin-Yang and the Five Phases (Wuxing) influence the human body, as well as six types of illnesses caused by climatic abnormalities. Let me explain section by section:

When Yin-Yang energies reach their extreme, they transform into their opposites. For instance, when ministerial fire (the fire of the Triple Burner and pericardium) becomes excessive, water energy arises below to restrain it—this exemplifies the subtle interplay of mutual generation and restraint among the Five Phases. The so-called "manifesting energy" refers to the biochemical interactions between the hand-foot meridians and the internal organs, a principle that equally applies to natural phenomena.

Chapter 28 specifically examines six types of disorders caused by climatic excess:

Excessive Jueyin wind-wood leads to convulsions, hypochondriac pain, vomiting and diarrhea; excessive Shaoyin sovereign fire causes skin ulcers, fever with chills, and mental confusion; excessive Taiyin damp-earth results in fluid retention, abdominal distension, and cholera-like symptoms; excessive Shaoyang ministerial fire brings tinnitus, vomiting, and sudden fatal illnesses; excessive Yangming dry-metal manifests as nasal congestion, cracked skin, and lower limb pain; while excessive Taiyang cold-water produces stiff back, night sweats, and spasms.

The occurrence of these diseases depends both on the degree of climatic imbalance and individual constitution with preventive measures. Sometimes regional epidemics break out, closely tied to local geography and climatic characteristics.

Humans are born from the transformation of Five Phases energies—internal organs constitute the source of life, while external limbs represent functional manifestations. With regular daily rhythms and proper cultivation, one can resist pathogenic factors. Yet in reality, people are often disturbed by seven emotions (joy, anger, worry, contemplation, grief, fear, shock) and assaulted by six external pathogens (wind, cold, summerheat, dampness, dryness, fire), compounded by pursuits of fame, unrestrained desires, and overexertion—thus various diseases inevitably follow.

Note: The "six qi" refers to six natural climatic factors (wind, cold, summerheat, dampness, dryness, fire), while "Five Phases" (Wuxing) denotes the five fundamental elements (metal, wood, water, fire, earth)—core concepts in traditional Chinese medical theory.

Rushing through cold and heat, braving wind and rain, violating taboos—all these harm the true primordial Qi (vital energy) within a person. When we consider this, how can premature death be attributed solely to fate? In truth, it is often the result of one’s own mistakes.

The Yellow Emperor’s Inner Canon states: Those who do not understand how to maintain fullness, who fail to regulate their Shen (spirit), who chase fleeting pleasures and defy the Dao of nurturing life—this is precisely what it speaks of. Pathogenic influences from heaven can injure the five viscera; improper diet and exposure to extremes of cold or heat harm the six bowels; dryness and dampness affect the skin, flesh, sinews, and vessels. Moreover, excessive joy or anger damages Qi, while extreme cold or heat injures the physical form. Wind is the chief of the hundred diseases—once it transforms and spreads, it gives rise to further ailments. Illnesses have no fixed manifestation, yet they often arise from wind. All disorders stem from the disharmony of Qi. From this perspective, the emergence and progression of disease are ultimately our own doing.

The formation of illness requires the interaction of internal and external factors. As the scriptures say: So-called affliction by pathogenic Qi occurs when external evils meet internal weakness—when inner and outer are in discord, disease arises. If one encounters a year of weakened Qi, a season of imbalance, or a waning moon phase, pathogenic influences grow especially strong. Should one repeatedly suffer exposure to these evils, the condition becomes critical. Though the Qi of heaven and earth interact, harmony brings peace while disharmony brings illness. When Qi is excessive, the weak succumb to evil; when Qi is insufficient, the strong impose suppression. The waxing and waning of host and guest Qi, when pent up and erupting, leads to disease.

If a person’s true primordial Qi is abundant, their daily rhythms are orderly, and their conduct avoids recklessness, even in the face of pestilence, symptoms will be mild. This is why the sages developed methods for nurturing life and cultivating the Dao. Some may ask: How can the Five Phases (Wood, Fire, Earth, Metal, Water) and Six Qi of heaven and earth affect human illness? Yet the five viscera correspond to the Five Phases, and Yin-Yang Qi waxes and wanes with the seasons. Wang Bing, the Tang dynasty physician, remarked: The heavens dispense Qi in accordance with the laws of the Five Phases—how can humans, living within this Qi, remain untouched by celestial patterns? People breathe the Yin-Yang Qi of heaven and earth, consume the five grains to nourish the body, and naturally shift with the rise and fall of Qi’s Yin and Yang. As the scriptures say: Heaven nourishes humans with the five Qi; earth nourishes humans with the five flavors—this is the principle.

The diaphragm is the vital passage where food enters and breath flows. If cold and heat are unregulated, taboos are violated, and Yin-Yang is imbalanced, pestilential evils gather and clash in the chest, giving rise to turmoil.

This scripture primarily discusses the intimate relationship between human health and natural climatic changes. It points out that when abnormalities occur within the five viscera and six bowels, ominous signs will manifest. The sages (referring to ancient physicians) observed natural laws and adopted methods to supplement deficiencies and drain excesses, consuming seasonal grains to nourish upright Qi (vital energy) and alternative grains (non-staple crops) to dispel pathogenic factors, thereby preventing illness.

The text particularly emphasizes the influence of the Five Movements and Six Qi (ancient Chinese medical theory of climatic cycles) on diseases. For example, exposure to cold in winter may lead to warm diseases in spring; exposure to wind in spring may cause summer diarrhea; heatstroke in summer may result in autumn malaria; and dampness in autumn may lead to winter coughs. This occurs because seasonal climatic changes affect the body's Yin-Yang balance.

In winter, Yang Qi (active energy) is stored internally—though cold enters, symptoms don't immediately manifest. Come spring, when Yang Qi emerges outward and Yin Qi (receptive energy) withdraws inward, the cold clashes with Yang Qi, creating warm epidemics. In summer, Yin Qi remains internal while summerheat lies dormant; by autumn, when Yin Qi emerges and Yang Qi withdraws, summerheat contends with Yin Qi, forming malaria.

Regional climatic differences also cause varying diseases, necessitating location-specific treatments. Sometimes illnesses aren't solely climate-induced—physicians must carefully discern causes, symptoms, and pulse readings rather than universally attributing them to Qi movements.

The second section focuses on six-pulse diagnosis. To master medicine, one must understand the Six Qi patterns of Yin-Yang circulation, distinguish northern and southern climatic variations, observe interactions between host and guest Qi, and recognize abnormal weather shifts—all discerned through pulse diagnosis.

When the Five Movements are deficient, the Qi that normally restrains them becomes invasive; when excessive, the Qi they restrain suffers harm. The Six Qi of heaven and earth interact—harmony brings health, conflict brings disease. Yet some climatic victories and defeats don't directly manifest in symptoms, requiring pulse diagnosis for detection.

Finally, six pulse characteristics are listed: the Jueyin pulse resembles a taut string; the Shaoyin pulse appears hooked; the Taiyin pulse feels deep and slow; the Shaoyang pulse is broad and floating; the Yangming pulse.... These pulse variations all serve as crucial diagnostic indicators.

This passage discusses the correspondence between human pulse conditions and celestial climate changes. The pulse of the Taiyang channel (one of the twelve primary meridians) typically appears short and rough; when it becomes broad, long, and moderate, this indicates normalcy. Excessive intensity or abnormalities in the pulse signify illness. The most dangerous condition arises from Yin-Yang imbalance—this is the fundamental principle.

Though the human body embodies the Five Phases (Wood, Fire, Earth, Metal, Water), its internal Qi contracts and expands in harmony with celestial energies. For instance, spring pulses feel taut like zither strings, summer pulses become surging, autumn pulses light as floating feathers, while winter pulses sink solid like stones—all manifestations of the Five Circuits and Six Qi (ancient Chinese medical theory of climatic cycles) in pulse diagnosis. Yet few can fully explain these subtle Qi transformations.

The human body responds to seasonal cold and heat: externally protecting physical form, breathing in resonance with heaven-earth energies, and internally nourishing the organs. When upper-lower coordination remains balanced, seasonal transitions proceed normally, Qi flows harmoniously, and temperature regulation stays appropriate, illness cannot arise. However, during annual Qi transitions when climatic exchanges occur, emptiness and fullness alternate, and contrary forces clash, diseases emerge—this reflects the natural patterns of Yin-Yang transformation. As classics state: violating these rhythms generates pathological changes, which manifest in all living things and human pulse conditions.

Diagnosis must first identify the year's dominant Qi characteristics. For example, in "northern governance" years, the two cun pulse positions (wrist locations) that should normally feel sunken and thin instead appear floating and large, while the two chi positions (forearm locations) that should float prominently become submerged and thin—this "Yin-Yang crossover" proves fatal. During "southern governance" years, the reverse condition called "inch-foot reversal" carries equal danger. Isolated pulse abnormalities merely indicate non-fatal illness. These diagnostic rules require mastery of annual Qi patterns—one must never violate nature's principles. Ignorant physicians who treat heat with cooling or cold with warming only aggravate conditions, causing countless premature deaths through such malpractice.

The Classic of Difficulties cites the Treatise on Normal Pulse Manifestations: When normal, the Taiyang channel pulse appears surging and long; the Shaoyang channel pulse fluctuates irregularly in speed and length; while the Yangming channel pulse floats broad yet short—these represent fundamental characteristics of the three Yin and three Yang channels.

This passage explains the relationship between the body's Yin-Yang transformations and pulse manifestations. The circulation of the six pulses (referring to the six fundamental pulse types in the body) corresponds with the waxing and waning of Qi dynamics and seasonal changes, presenting different pulse patterns in various seasons. Comparative study of pulse theories reveals shared fundamental principles with nuanced differences.

A normal pulse should appear precisely during Qi transitions—neither premature nor delayed—with balanced strength. Any deviation indicates illness. Classical texts state: After food enters the stomach, turbid Qi returns to the heart while refined essence (Jing) circulates through blood vessels, ultimately converging in the lungs. The lungs govern all vessels, distributing essence to the body's surface. Vessel-essence circulates among organs, maintaining equilibrium. The Cunkou pulse (primary diagnostic position at the wrist) reveals life and death conditions.

The ancient physician Qin Yueren (Bian Que) profoundly understood this principle, asserting in the Classic of Difficulties that the Cunkou pulse alone could diagnose disorders of all five viscera and six bowels. Healthy pulses show steady rhythm; observing fifty pulse beats reveals the waxing-waning of organ functions.

Regarding diagnostic methods: The Treatise on Normal Pulse Manifestations in this classic specifically discusses breath-pulse coordination. Subsequent passages analyze seemingly normal Cunkou pulses that foretell death, and cases where upper pulses disappear while lower pulses persist—indicating critical but not necessarily fatal conditions. When abnormal Qi-blood circulation prevents timely arrival at Cunkou, the Chi pulse (inner wrist position) becomes diagnostic. These perspectives require flexible application.

True pulse mastery requires understanding the Three Regions and Nine Indicators (whole-body palpation), Seven Exterior-Eight Interior-Nine Pathway classifications, and twelve meridians, integrated with Five Phases and Six Qi cyclical patterns—only then can one become an accomplished physician.

Chapter Thirty discusses treatment methods:

For Liver meridian (Wood phase) disorders: use sour herbs to drain and pungent herbs to supplement. When treating Jueyin meridian conditions: supplement with pungent, drain with sour, moderate with sweet. Heart meridian (Fire phase) disorders: drain with sweet, supplement with salty. Shaoyin conditions: drain with sweet, astringe with salty. Shaoyang conditions: supplement with salty, drain with sweet, soften with salty (each meridian corresponds to specific herbal flavor therapies).

This passage explains the medicinal principles in Traditional Chinese Medicine's theory of Five Phases (Wuxing) and Six Qi (Liuqi), which correlates climatic changes with human physiology. It details how to pair herbal properties and flavors based on the interaction between Host Qi (the seasonal norm) and Guest Qi (abnormal variations), following Five Phases theory.

The supplementation-draining principles for each Phase are: Earth Phase disorders use bitter herbs to drain and sweet herbs to supplement; Metal Phase disorders use pungent herbs to drain and sour herbs to supplement; Water Phase disorders use salty herbs to drain and bitter herbs to supplement. When abnormal climate (Guest Qi) becomes excessive, draining methods should weaken it while supplementing Host Qi, and vice versa if Host Qi dominates. Treatment intensity must be adjusted according to the urgency of symptoms.

Classical texts record multiple therapeutic approaches: methods addressing abnormal Celestial Director Qi (first half-year climate) and Terrestrial Qi (second half-year climate); dietary and herbal adjustments for annual climatic patterns (Suiyun). Since Five Phases and Six Qi imbalances cause various diseases, ancient sages meticulously documented methods using pungent, sour, sweet, bitter, salty, and bland herbs for rebalancing through supplementation and draining.

Physicians must: comprehend annual climatic characteristics, observe symptoms, examine pulse patterns, discern Yin-Yang attributes, and treat according to classical principles. The subtlety of herbal application lies in: either following or countering a herb's nature; utilizing Five Phases restraining cycles; or employing "parent-child" organ generation relationships (Zangfu theory) when combining flavors.

Geographical variations must be considered, as discussed in the "Neijing's" chapter on region-specific treatments. Practical considerations include: assessing healthy Qi deficiency/excess; disease severity; treatment urgency; and formula potency. Standard treatment ("zhengzhi") uses opposing principles (e.g., cold herbs for heat syndromes), while exceptional cases require "contrary treatment" ("fanzhi", e.g., hot herbs for true-cold/false-heat syndromes). These methods are thoroughly documented in classical medical texts.

This passage discusses the dialectical methods in Chinese medicine for treating cold-heat and deficiency-excess syndromes. The so-called "contrary treatment" involves applying therapeutic measures opposite to the surface symptoms: for cold syndromes, hot-natured medicines should be accompanied by cold-natured drugs to guide the effect; for heat syndromes, cold-natured medicines should be assisted by hot-natured substances. For draining conditions, appropriate astringents should be used; for obstruction syndromes, proper unblocking agents should be applied.

Specific treatment approaches include: warming and tonifying Qi for bodily deficiency, using rich-flavored medicines to nourish Jing-blood insufficiency. Some treatments target the root cause for efficacy, others address symptoms directly, some regulate the middle burner's Qi mechanism, while others treat both root and manifestation simultaneously. Some employ contrary methods, others follow the condition's tendency.

For pent-up conditions in the five zang organs, distinct methods apply: emesis for liver Qi stagnation, diaphoresis for heart fire constraint, purgation for spleen-stomach stagnation, diuresis for lung Qi obstruction, and suppression for kidney water exuberance. These five methods restore Qi balance, to be adjusted according to deficiency-excess conditions. Note these are therapeutic measures, not daily regulatory methods.

Treatment must distinguish acute from chronic conditions, with medicine dosages and properties (strong/mild) determined case by case. The five flavors correspond to the five zang organs: sweet enters spleen, sour enters liver, salty enters kidneys, bitter enters heart, pungent enters lungs. Medicinal properties differ: pungent disperses, sour astringes, sweet moderates, bitter consolidates, salty softens. Pungent-sweet belong to Yang and can disperse; sour-bitter belong to Yin and can promote discharge; bland flavors promoting percolation also belong to Yang.

When treating according to the Five Movements (Wu Yun, Five Phases operation), first resolve stagnant Qi and identify the pathogenic source. For instance, when the sun governs heaven (climatic abnormality), drain water's source in September; when yang brightness governs heaven, drain metal's source in June, and so forth. Acupuncture must accord with seasonal timing, neither opposing climatic patterns nor aggravating prevailing pathogens nor stimulating recurrent evils. This constitutes the therapeutic essence.

Formula composition follows rules: one sovereign medicine with two minister medicines forms an odd-numbered formula; two sovereigns with four ministers form an even-numbered formula. These formulation principles, recorded in medical classics, represent time-tested therapeutic laws verified over millennia.

This passage explains the fundamental principles of herbal formulation in Traditional Chinese Medicine and the conceptual framework of sovereign (jun), minister (chen), assistant (zuo), and envoy (shi) herbs. The "three odd numbers" represent sovereign herbs, while "three ministers and six even numbers" denote minister and assistant-envoy herbs. For treating upper body disorders, gentle-acting herbs should be employed, whereas acute-acting herbs are more suitable for lower body ailments. Strong-flavored herbs have swift action while mild-flavored ones act gradually—the selection must correspond to the affected area.

Formulations come in three scales: minor prescriptions follow the "one sovereign with two ministers" pattern, medium prescriptions use "one sovereign with three ministers and five assistants," and major prescriptions employ "one sovereign with three ministers and nine assistants." The therapeutic principle dictates using hot-natured herbs for cold syndromes and cold-natured herbs for heat syndromes; mild conditions require counteractive treatment while severe cases need compliant alleviation. The sovereign herb targets the primary symptom, ministers support the sovereign, and assistant-envoy herbs coordinate with ministers—this system transcends the simplistic three-grade classification (upper-grade for life nourishment, middle-grade for nature cultivation, lower-grade for disease treatment) found in the Divine Farmer's Materia Medica.

Although the Shennong Bencao Jing categorizes herbs into three grades, practical application shouldn't be constrained by this. The herb that treats the main disease should serve as sovereign, with others functioning as supporting ministers and envoys. The reinforcement-reduction methods of the five movements and six qi (natural climatic patterns) and five-flavor combinations all follow this rationale. Formulations needn't exhaust all related herbs—just one or two assistant herbs may suffice. For instance, when using sour herbs to drain the liver, employing every sour herb isn't necessary.

Some practitioners rigidly assume that during a wood-dominant year in the five-phase cycle, one must always drain the liver and supplement the spleen. This is misguided. Each individual's organ systems have unique excess-deficiency patterns—if someone already has liver deficiency and spleen excess, further liver draining and spleen supplementation would exacerbate the imbalance, potentially causing fatal mistreatment. Thus physicians must conduct thorough pattern differentiation.

Effective herbal treatment requires precise symptom matching, just as acupuncture demands accurate point selection—only then will therapeutic effects manifest as immediately as a drum responding to its beater or an arrow hitting its target. The crux lies in comprehending the disease's momentum and eradicating its root cause.

This passage conveys two main ideas: first, the principle of caution in health preservation and disease treatment, and second, the value of the medical classic Suwen and its theory of the Five Phases (Wuxing).

The text begins by observing that harming one's health often produces quicker effects than nourishing it. Just as medicine works slowly but eating something harmful causes immediate illness, this reflects a universal principle—building is difficult while destruction comes easily. Ancient sages repeatedly emphasized this truth, fearing later generations might neglect it. Unfortunately, many physicians in later ages possessed shallow knowledge and failed to grasp the essence of Suwen. This scripture predates even the Confucian Five Classics, systematically expounding on celestial phenomena, geography, human affairs, and the profound workings of the Five Phases (Wood, Fire, Earth, Metal, Water). It stands as both the source of Yin-Yang theory and a medical treasure. Throughout history, only Wang Bing of the Tang Dynasty truly comprehended its depths.

The second part presents a dialogue revealing the profundity of Five Phases theory. Someone questioned Hu Yuan: During the fourth year of Yuanfeng in the Song Dynasty (1081 CE), when the year-star (Jupiter) was in the Xinyou position, Suwen's calculations predicted a "year of dried-up currents" (indicating deficient water movement). Yet the Yellow River experienced catastrophic flooding, contradicting theoretical predictions. Hu Yuan sighed at the depth of this question and shared his teacher's insight: The Five Phases manifest in heaven as the five planets (Venus, Jupiter, etc.), form the Five Sacred Mountains (Taishan, Huashan, etc.) on earth, correspond to the five viscera (heart, liver, spleen, lungs, kidneys) within the human body, and appear externally as the five sense organs (ears, eyes, mouth, nose, etc.). This demonstrates how Five Phases theory integrates the grand systems of heaven, earth, and humanity.

This scripture primarily expounds on the mutual generation and restriction relationships among the Five Phases (Wood, Fire, Earth, Metal, Water) and their manifestations in the natural world. The virtues (De) of the Five Phases correspond to five constant principles (Five Constants), their flavors to five tastes, their appearances to five colors, and their expressions to five sounds. Plants are categorized into five grains and five fruits, while animals are classified into five livestock and five insects—all representing different manifestations of the Five Phases in nature.

The celestial numbers and terrestrial numbers each comprise five, combining to form various transformations that serve as the foundation for the operations of spirits and deities. Specifically:

• Heaven's One generates Water, Earth's Six completes it, converging in the North and governed by Bing-Xin;
• Earth's Two generates Fire, Heaven's Seven completes it, converging in the South and governed by Wu-Gui;
• Heaven's Three generates Wood, Earth's Eight completes it, converging in the East and governed by Ding-Ren;
• Earth's Four generates Metal, Heaven's Nine completes it, converging in the West and governed by Yi-Geng;
• Heaven's Five generates Earth, Earth's Ten completes it, converging in the Center and governed by Jia-Ji.

Among the Five Phases, Fire and Metal belong to the "dual terrestrial" category, born from Yin and completed by Yang; Water, Wood, and Earth belong to the "triple celestial" category, born from odd numbers and completed by even numbers. Though the Five Phases differ, their Qi (vital energy) generally remains balanced during annual cycles, preventing mutual harm.

The balanced manifestations of the Five Phases:

• Balanced Wood Qi appears as gentle winds fostering growth, without violent storms;
• Balanced Fire Qi appears as radiant illumination, without scorching flames;
• Balanced Earth Qi appears as moistening clouds, without torrential downpours;
• Balanced Metal Qi appears as cool dew and mist, without killing austerity;
• Balanced Water Qi appears as solemn dignity, without hail or frost.

Yin and Yang interact dynamically, cold and heat alternate, ascent and descent follow order, and prosperity and decline occur in due time. If the Five Phases operate prematurely (prior to Heaven), their Qi may become excessive; if delayed (posterior to Heaven), their Qi may become insufficient. Excess leads to over-restricting what they normally restrain while bullying what they cannot restrain; insufficiency results in being slighted by what they normally restrain and bullied by what they cannot restrain. Thus, the strong may sometimes dominate the weak, while the weak may sometimes fear the strong—this is the natural pattern.

Finally, the text mentions the "Lesser Jue (Diminished Wood) movement," referring to when Wood Qi is insufficient, allowing Metal Qi to exploit the weakness and oppress Wood Qi.

This scripture elucidates the patterns of mutual generation and restraint among the Five Phases (Wood, Fire, Earth, Metal, Water), along with the calamitous phenomena that manifest when natural climate becomes imbalanced.

When any Phase becomes deficient, its restraining Phase will exert excessive suppression, resulting in climatic abnormalities. For example:

• When Wood Qi (Muqi) is insufficient, Metal Qi (Jinqi) over-restrains it, causing early autumn and premature withering of plants
• When Fire Qi (Huoqi) is deficient, Water Qi (Shuiqi) over-restrains it, producing cold phenomena like frost and freezing
• When Earth Qi (Tuqi) is weak, Wood Qi over-restrains it, triggering violent winds and sandstorms
• When Metal Qi is lacking, Fire Qi over-restrains it, bringing drought, extreme heat, and scorched vegetation
• When Water Qi is insufficient, Earth Qi over-restrains it, causing abnormal phenomena like alternating spring floods and sudden drying

Yet the Five Phases possess an automatic regulatory mechanism called "returning Qi" (Fuqi). When any Phase over-restrains another, a counterbalancing Phase emerges to restore equilibrium:

• When Wood Qi becomes excessive, Metal Qi arises to restrain it
• When Fire Qi grows too strong, Water Qi emerges to balance it
• When Earth Qi becomes overbearing, Wood Qi activates to regulate it

This dynamic interplay of generation and restraint resembles nature's eternal wrestling match—no single force can permanently dominate. All growth and decay are governed by these Five Phase interactions: beings flourish when harmonizing with supportive Qi, yet wither when encountering conflicting Qi. These principles manifest not only in climate patterns but also govern the rise and fall of all phenomena in the manifested world.

This passage explains the relationships of mutual generation and restraint among the Five Phases (Wood, Fire, Earth, Metal, Water), and how regulating them maintains natural balance. Just as water restrains fire during firefighting, excessive water creates new problems requiring Earth's balancing influence. When any aspect of Qi movement between heaven and earth becomes overly dominant without proper restraint, all living things struggle to survive.

Nature manifests five climatic energies—wind, heat, dryness, dampness, and cold—corresponding to the five stages of growth, transformation, ripening, harvesting, and storing. Only through sequential generation and reverse restraint can cyclical balance be achieved. Like balancing a scale, what rises too high must be lowered, and what sinks too low must be raised. When the movements of these five energies remain harmonious, they nurture one another; when imbalanced, they inflict mutual harm. Those who understand this principle adjust their cultivation according to Qi's fluctuations—neither violating natural laws nor exacerbating excessive energies or imbalances.

The truly enlightened master their emotions to prevent Shen (spirit) from becoming disordered, adapting to seasonal changes without falling prey to illness. Alas, in our time it has become rare to find those who truly comprehend the profound mysteries of the Five Phases' generation and restraint to discuss these principles with.