第一章星宿宫位

Chapter One: Palaces and Positions of the Stars

Auspicious and Inauspicious Star Charts · Distribution of Celestial Degrees

Overall Paraphrase

The celestial sphere totals 365 degrees, 20 minutes, and 50 seconds, distributed among the twelve palaces. Only the Zi (Rat) and Wu (Horse) palaces each occupy 30 degrees, 43 minutes, and 80 seconds, while the remaining ten palaces each occupy 30 degrees, 43 minutes, and 79 seconds. A year must comprise 365 days plus three double hours before the Beginning of Spring arrives—this corresponds with the celestial degrees; a month must comprise 30 days plus five double hours and two quarters before a solar term arrives—this corresponds with the degrees of one palace. 🌐

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Standard Determination of Dawn and Dusk Times

Overall Paraphrase

As for the standard determination of dawn and dusk times: from the Autumn Equinox to the Spring Equinox, dawn and dusk are fixed at the Mao and You positions; from Qingming to Bailu, dawn and dusk are fixed at the Yin and Xu positions.

As for the fixed times of sunrise and sunset: from Xiaohan to Mangzhong and Xiaoshu to Daxue, the sun rises and sets at the Mao and You positions. Only at the Winter Solstice does the sun rise at the Chen position and set at the Shen position; at the Summer Solstice, the sun rises at the Yin position and sets at the Xu position.

The climate has fluctuations and discrepancies that form the monthly calendar; the sun has variations in rising and setting that complete the yearly cycle. This is indeed what one should know when observing the heavens above and examining the earth below, and it is also what must be investigated for one's daily activities of going out and coming in. 🌞

🧠 Deep Understanding

Core Concepts 💡

• Unity of Celestial Degrees and the Calendar: The celestial sphere of slightly over 365 degrees corresponds precisely with the number of days in a tropical year; one palace of approximately 30.5 degrees corresponds with the days in a synodic month. The ancients established a precise conversion system of "degrees-days-palaces-months" through astronomical observation.
• Directional Patterns of Dawn and Dusk Times: Using the Spring/Autumn Equinoxes and Winter/Summer Solstices as key nodes, the year is divided into several periods, with sunrise and sunset directions in each period showing regular variation.

Modern Interpretation 🌟

• This section is essentially fundamental astronomical calendrical knowledge, providing the spatiotemporal coordinate system for stellar astrology. Celestial degrees, palace divisions, and solar term moments together constitute the measurement framework for the Seven Luminaries and Four Hidden Stars (Qizheng Siyu) system.
• The variation in sunrise and sunset directions originates from the tilt of Earth's rotational axis (obliquity of the ecliptic at approximately 23.5°). The ancients used the twelve Earthly Branch directions to precisely record the rising and setting directions of the sun at different solar terms, which highly corresponds with modern astronomical almanacs.

Practical Value ⚡

• For stellar astrology practice, mastering celestial degree distribution is the prerequisite for chart construction and palace determination; understanding the patterns of solar rising and setting helps in calibrating the palace positions corresponding to the birth moment.
• Modern readers can apply this to astronomical observation and time management: understanding how sunrise and sunset directions change across seasons helps comprehend the relationship between natural rhythms and human daily routines.

Philosophical Reflection 🤔

The ancients' precision in measuring celestial time down to the "second" level embodies the cognitive path of "deducing human affairs from the ways of heaven"—first establishing a precise astronomical model, then deducing human fortune and misfortune from it. This correspondence from the macroscopic cosmos to individual destiny is the metaphysical foundation of stellar astrology.

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Heavenly Chart Overlay Method · Earthly Chart Passage Method · Human Chart Substantiality-Vacuity Method

Overall Paraphrase

The Heavenly Chart method counts forward, representing the leftward rotation of heaven. Human fate can be established in each of the twelve palaces differently, but when adding the Mao position of the Heavenly Chart it becomes the same. The classic says: "The Heavenly Chart rotates above the Earthly Chart, and clearly at Mao is the Palace of Destiny." The Yelü Twelve Palaces, the Fascination with the Dou Classic (Faming Wangdou Jing), and the Dongxi Xi Mei Xin Zhu have all explained this in detail. Students of the current age who do not understand this chart and only use the Zi palace as an example to extrapolate to all twelve palaces are numerous; some know that the Mao position is added to Yin-Chen by themselves, overlapping to Chou-Si three positions, adding Zi-Wu to the four cardinal positions, adding Hai-Wei to five positions, adding Shen-Xu to six positions, adding You to the opposite position—but they only grasp the outward forms without understanding the underlying reasons. 🔄

The Earthly Chart method counts backward, representing the rightward rotation of the sun and moon. The Earthly Chart is stationary, so the twelve palaces of destiny all share this same passage. The classic says: "Vertical passage, horizontal passage." Students of the current age only know Zi passes through Mao, Chou through Yin, Chen through Hai, Si through Xu, Wu through You, Wei through Shen, but do not know that counting backward from one Mao through Zi yields the passage—the reason behind this principle is self-evident without further explanation. 🔄

The Human Chart method emphasizes substantiality and vacuity, as it seeks to connect the Four Pillars with the celestial chart. What the Xu Qintang emphasizes lies precisely here. For example, for a person born in the year Renshen, month Dingwei, day Wuxu, hour Jiayin, then in the star chart the positions Wei, Shen, Xu, and Yin are the "filled" (substantial) positions, where beneficent stars such as the yearly commander, body and destiny stars, official and fortune stars should reside; Xu, Mao, Chen, and Zi are the "empty/vacant" positions, where malefic stars and taboo luminaries should reside. If beneficent stars fall into empty positions, it is inauspicious; if malefic stars fall into empty positions, it is auspicious; if beneficent stars fill substantial positions, it is auspicious; if malefic stars fill substantial positions, it is inauspicious. The rest follows this pattern by analogy.

🧠 Deep Understanding

Core Concepts 💡

• Three Charts Serving Distinct Functions: The Heavenly Chart governs movement (active), symbolizing heaven's leftward rotation, determining the location of the Palace of Destiny; the Earthly Chart governs stillness (passive), symbolizing the earth's support, determining palace passage relationships; the Human Chart governs substantiality and vacuity, mapping the Four Pillars' Heavenly Stems and Earthly Branches to the star chart palaces to judge auspicious and inauspicious distributions.
• The Dialectic of Substantiality and Vacuity: Branches present in the Four Pillars are "substantial" (filled); those not present are "vacant." Beneficent stars should sit in substantial positions; malefic stars should sit in vacant positions. This principle embodies the traditional destinal logic that "wealth and office should have roots, while inhibitions and baleful influences should be void."

Modern Interpretation 🌟

• The Heavenly Chart overlay is essentially a coordinate transformation: different people have different points of fate-establishment, but using the Mao position (the direction of sunrise) as a reference for unified conversion is akin to establishing a standardized reference frame.
• The backward counting logic of Earthly Chart passage is related to the symmetry of the apparent motions of the sun and moon: both appear to move rightward, hence the passage is arranged backward.
• Human Chart substantiality-vacuity is the bridge between the Four Pillars and the star chart: mapping the Earthly Branches of the Eight Characters onto the star chart's twelve palaces to determine which palaces are "activated" (filled) and which are "void" (empty), thereby guiding the interpretation of beneficent and malefic star placements.

Practical Value ⚡

• The Three Chart method provides a complete operational protocol for stellar astrology charting: first use the Heavenly Chart to determine the Palace of Destiny, then the Earthly Chart to discern passage relationships, and finally the Human Chart to assess substantiality and vacuity—three steps advancing progressively.
• The Human Chart's principle of substantiality and vacuity remains relevant in modern contexts: when beneficent stars are well-placed, affairs are easier to accomplish; when malefic influences are voided, calamities may be reduced—this can be converted into a risk assessment approach: when advantageous conditions have actual support, success probability is higher; when unfavorable factors lack a foundation, their destructive power may be limited.

Philosophical Reflection 🤔

The Three Chart method reveals the three-dimensional structure of space-time-human affairs in ancient stellar astrology: the Heavenly Chart corresponds to cosmic space and its rotation, the Earthly Chart to terrestrial direction and its fixation, and the Human Chart to the Heavenly Stems and Earthly Branches of one's individual birth moment. Their convergence constitutes a complete judgment system of "heavenly time, earthly advantage, and human harmony." The dialectic of substantiality and vacuity further reflects the Daoist wisdom that "what has substance serves as benefit; what lacks substance serves as utility"—emptiness itself is also a kind of resource.

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Determination of the Twelve Palaces, Twenty-Eight Mansions, and Regional Field Divisions

Overall Paraphrase

🧠 Deep Understanding

Core Concepts 💡

• The Twenty-Eight Mansions are evenly apportioned among the twelve palaces, forming a celestial coordinate system: each palace contains approximately two to three mansions, with each mansion having fixed degrees.
• The regional field (fenye) theory maps celestial regions to geographical areas of ancient feudal states, establishing an interpretive framework for "where celestial changes manifest on earth."

Modern Interpretation 🌟

• This is a conversion table between the twelve zodiac constellations and the Twenty-Eight Mansions, providing the basis for "mansion-degree positioning" in stellar astrology calculations. The Western zodiac (Libra, Scorpio, etc.) and the Twenty-Eight Mansions achieve seamless correspondence here.
• Although the fenye theory originates from ancient geographical concepts, it reflects the ancients' systematic thinking about heaven-earth correspondences, which can be understood as an early "cosmic geographic information system."

Practical Value ⚡

• In stellar astrology chart calculation, the mansion degrees must first be converted to twelve-palace positions. This table is the basic tool for palace-mansion interchange.
• Modern regions differ greatly from ancient times; the fenye application can be transformed into a directional tendency reference—if the stars in a particular palace are favorable, its corresponding direction may be given priority consideration.

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Determination of the Twelve Palaces' Secondary Positions (Ci)

Overall Paraphrase

Ximu is originally at the Yin position, Dahuo at Mao, Shouxing at Chen, Chunwei at Si, Chunhuo at Wu, Chunshou at Wei, Shishen at Shen, Daliang at You, Xianglou at Xu, Juzi at Hai, Xuanxiao at Zi, and Xingji at Chou. Carefully search and identify within the twelve palaces. 🔍

🧠 Deep Understanding

Core Concepts 💡

The correspondence between the twelve secondary positions (Xingji, Xuanxiao, Juzi, Xianglou, Daliang, Shishen, Chunshou, Chunhuo, Chunwei, Shouxing, Dahuo, Ximu) and the twelve Earthly Branches forms a uniquely Chinese celestial coordinate system, functionally equivalent to the Western zodiac of twelve constellations.

Modern Interpretation 🌟

The twelve secondary positions and the twelve palaces correspond to form a measuring system independent of the Twenty-Eight Mansions, used in stellar astrology to judge the position of the Year Star (Jupiter) and the beginnings of solar terms. Jupiter completes one revolution in approximately twelve years, moving through one Ci per year—hence the twelve Ci also serve as one of the foundations of the year-reckoning system.

Practical Value ⚡

Understanding the twelve Ci helps modern learners better grasp the correspondence between Jupiter's cycle and calendar years, enabling quick positioning of the Year Star's current palace in chart interpretation.

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Determination of the Eleven Luminaries' Celestial Travel Degrees

Overall Paraphrase

Jupiter (Wood Star) travels approximately one palace per year, completing one celestial revolution in twelve years. In the year of Mao, it commences from the Mao position, hence it is called the "Year" star.

Mars (Fire Star) travels approximately one palace every two months, completing one revolution in two years. 🔥

Saturn (Earth Star) travels approximately one mansion per year (about 12-plus degrees), completing one revolution in twenty-eight years.

Venus (Gold Star) and Mercury (Water Star) travel one palace per month, never departing far from the sun's front or back, completing one revolution per year. 💫

Qi Yao (Purple Qi) completes one revolution in twenty-nine years.

Bo Yao (Moon Comet/Lunar Apogee) completes one revolution in nine years.

Luo Ji (Rahu and Ketu) completes one revolution in eighteen years. ☄️

🧠 Deep Understanding

Core Concepts 💡

• The Eleven Luminaries are divided into two categories: Seven Governors (Qi Zheng)—Sun, Moon, Wood, Fire, Earth, Gold, Water—which are tangible luminaries with regular travel patterns; and Four Hidden Stars (Si Yu)—Purple Qi, Moon Comet, Rahu, Ketu—which are intangible luminaries arising from derived computational points of astronomical calculations, with slower or special movement cycles.
• Each luminary's travel cycle serves as a core parameter for annual fortune assessment in stellar astrology calculations.

Modern Interpretation 🌟

• Jupiter's orbital period is approximately 11.86 years, highly consistent with "one revolution in twelve years"; Mars takes about 687 days, roughly 23 months, near "one palace every two months"; Saturn takes approximately 29.46 years, approximated as 28 years in ancient calculations.
• Venus and Mercury are inner planets that never stray far from the sun in the sky (Venus has a maximum elongation of about 47°, Mercury about 28°), so "one palace per month, never leaving the sun's vicinity" is an accurate observational summary.
• Purple Qi, Moon Comet, Rahu, and Ketu are not actual celestial bodies but rather special points derived from orbital calculations (such as the intersections of the Moon's path with the ecliptic), with cycles being computed values. From a modern perspective, the Qizheng Siyu system is a prototype of ancient celestial mechanics modeling.

Practical Value ⚡

• By mastering each luminary's travel cycle, one can quickly determine which palace a given luminary occupies in a given year, thereby deriving the focus of annual fortune.
• Modern applications can interpret planetary cycles as symbols of rhythm: fast stars (Venus, Mercury) govern daily changes, slow stars (Saturn, Qi) govern long-term trends, and Jupiter in between represents annual rhythms. This parallels the "inner planets—outer planets" functional distinction in modern astrology.

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Song of Approximating the Sun's Travel Degrees

Overall Paraphrase

Our dynasty's calendrical method places the sun mostly at Xu (Emptiness) mansion, 1st degree at the Beginning of Spring.

[Translator's note: "Jing mansion, early autumn" in the original text refers to the sun still being within the early-to-middle degrees of the Jing mansion; autumn has not yet arrived while intense summer heat prevails, hence "early autumn" metaphorically indicates the latter portion of the Jing mansion. "Zhen wandering" indicates that at the Autumn Equinox the sun moves within degrees of the Zhen mansion without being fixed at a whole number degree.]

🧠 Deep Understanding

Core Concepts 💡

This song provides a quick-reference method for determining the sun's location within the Twenty-Eight Mansions across all twenty-four solar terms, serving as a practical tool for determining the sun's position in stellar astrology chart construction.

Modern Interpretation 🌟

• The sun's movement song is highly consistent with modern astronomical ephemeris data, demonstrating the remarkable observational precision of ancient astronomy. The sun travels approximately 0.9856 degrees per day (approximately one degree), matching the degree changes per solar term in the song.
• From Xu mansion 1st degree at Beginning of Spring to Niu mansion 5th degree at Great Cold, the sun traverses the complete circuit of Twenty-Eight Mansions, completing the tropical year cycle. This recurring trajectory is the most direct representation of the ecliptic band.

Practical Value ⚡

• In practical chart construction, one can quickly determine the sun's palace position through solar terms without consulting an astronomical almanac day by day.
• The song can serve as classic material for calendrical study and astronomy education, aiding in understanding the relationship between the sun's apparent motion and solar terms.

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Song of Approximating the Moon's Travel Degrees

Overall Paraphrase

If you wish to know the Moon's travel degree direction, at the Beginning of Spring's solar term it rises from the Wei (Void) mansion. Traveling thirteen degrees per day, every five days it moves through two palaces in sequence.

In the second month it commences from Kui; in the third month from Wei (Stomach); in the fourth month beginning from Bi; in the fifth month it rises from Jing; in the sixth month from Liu; in the seventh month Zhang mansion is its abode; in the eighth month Yi mansion serves as its beginning; in the ninth month (Dragon-Horn late autumn) it wanders in the Jiao mansion; in the tenth month Fang mansion serves as its primal star; in the eleventh month (mid-winter) Ji star is carefully sought; in the twelfth month (month of Chou) the Niu (Ox) mansion is what must be known above all. There is no error in the celestial circuit's degrees.

This is the direction of the Moon's travels—from this, a person's Body Palace (Shen Gong) is determined in destiny. 🌙

🧠 Deep Understanding

Core Concepts 💡

• The Moon travels approximately thirteen degrees per day, covering two palaces (approximately 65 degrees) every five days. The Moon's sidereal period is approximately 27.32 days, with a mean daily motion of about 13.18 degrees—extremely close to "thirteen degrees per day."
• The Body Palace (related to the Moon's position) represents the body, emotions, and foundations in stellar astrology, carrying equal weight to the Palace of Destiny.

Modern Interpretation 🌟

The ancients used the Moon's starting mansion position at the beginning of each month as a locational anchor, moving month by month, forming a rapid-reference method for the Moon's travel. This shares the same principle as modern ephemeris calculations of the Moon's position—the ancients merely codified it into mnemonic verse form for easy memorization and rapid application. The Moon's variations in speed also factor into the calculation of the "Moon's apogee" and other derived points.

Practical Value ⚡

• The Body Palace is the key palace second only to the Palace of Destiny in stellar astrology, representing the inner self and emotional roots. Mastering the Moon's travel method allows quick determination of the Body Palace position.
• The Moon's rapid movement also reminds practitioners to pay attention to the immediate state of the palace where the Moon currently resides—it reflects short-term emotional fluctuations and environmental adaptation.

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Song of Approximating the Twenty-Eight Mansions' Degrees

Overall Paraphrase

The Shi mansion has 18 degrees; Bi approximately ten in number (about 8-9); Kui 17.5 degrees; Lou 13 degrees; Wei (Stomach) 14.5 degrees; Mao a solid 11 degrees; Bi 16 degrees and more; Zi half a degree, brilliant by the riverbank; Shen 9 degrees in its direction; Jing 30 degrees meeting its lord; Gui about 3 degrees; Liu 13-14 degrees blooming fragrant; Xing 7 degrees, still moving by night; Zhang and Yi each 19 degrees; Zhen 18.5 degrees; Jiao 13 degrees at the head; Kang 9 degrees with radiant sunshine; Di 16 degrees as befits; Fang and Xin each 5 degrees; Wei (Tail) 17 degrees flying southward; Ji 10 degrees, illumining the ten directions; Dou 24 degrees in its circuit; Niu 7 degrees (the cattle crossing on the Seventh Eve); Nü 11.5 degrees; Xu slightly less than 10 degrees; Wei (Danger) 16 degrees. ⭐

🧠 Deep Understanding

Core Concepts 💡

Each of the Twenty-Eight Mansions has its own fixed degrees, totaling approximately 365 degrees, constituting the traditional Chinese celestial measurement system. Mansion degrees are the fundamental unit for stellar astrology positioning.

Modern Interpretation 🌟

• The sum of all mansion degrees approximates the full celestial circuit of 365 degrees, corresponding to the number of days in a tropical year. The Twenty-Eight Mansions are not evenly divided but rather based on actual sky regions, reflecting the scientific spirit of measurement-based degree determination.
• Carrying the mansion degrees incrementally within a mansion reflects ancient astronomical observational techniques; each mansion maintains slight differences in its degree divisions based on observed star distributions.

Practical Value ⚡

• In stellar chart calculations, mansion degrees serve as the foundational data for palace conversion and travel-degree calculation. Practitioners should memorize each mansion's degrees to perform precise degree arithmetic.

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Song of Approximating Mansion-to-Palace Transition Degrees

Overall Paraphrase

Di mansion, 1st degree, passes through the Mao palace; Wei (Tail) mansion, 3rd degree, passes through the Yin palace; Dou mansion, 3rd degree, enters the Chou palace; Nü mansion, 1st degree, passes through the Zi palace; Wei (Danger) mansion, 12th degree, passes through the Hai palace; Kui mansion, 1st degree, enters the Xu palace; Wei (Stomach) mansion, 3rd degree, passes through the You palace; Bi mansion, 6th degree, passes through the Shen palace; Jing mansion, 8th degree, passes through the Wei palace; Liu mansion, 3rd degree, passes through the Wu palace; Zhang mansion, 14th degree, passes through the Si palace; Zhen mansion, 9th degree, passes through the Chen palace.

The above degrees provide only the general outlines; detailed content is contained in the Sanchen Tongzai (The Complete Transmission of the Three Luminaries). 📐

🧠 Deep Understanding

Core Concepts 💡

• Transition degrees precisely mark the boundary positions between the Twenty-Eight Mansions and the twelve palaces. Determining exactly when one enters a new palace requires reference to the specific mansion degrees.
• This serves as the core parameter for palace-mansion conversion: for instance, "Di 1st degree crossing into Mao" means that the 1st degree of the Di mansion is the critical point where the celestial path moves from the Chen palace into the Mao palace.

Modern Interpretation 🌟

The boundaries of the twelve palaces do not correspond uniformly with the mansion degrees. The transition degree table functions as a set of anchor points within the Twenty-Eight Mansions for the division lines of the zodiac, essentially dividing the circular celestial region into twelve sectors and noting their starting boundaries in terms of which mansion at which degree.

Practical Value ⚡

• In practical chart construction, when a planet is located at a particular mansion degree, one must consult the transition degree table to determine its actual palace assignment. For example, the section of the Jing mansion before the 8th degree belongs to the Shen palace, while the section after the 8th degree belongs to the Wei palace.
• This also constitutes a bridge between calendrical calculation and stellar astrology practice that cannot be disregarded.

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Song of Determining the Yin (Tiger) Hour in the Twelve Months

Overall Paraphrase

In the first and ninth months: The Yin hour begins at the end of the fifth watch, at two quarters (of the hour).

In the second and eighth months: The Yin hour ends at the fourth quarter of the fifth watch.

In the third and seventh months: Yang time dawn's light indicates the Yin hour.

In the fourth and sixth months: The moment of sunrise is the Yin hour.

In the fifth month: When the sun rises to a height of three zhang above the ground marks the Yin hour.

In the tenth and twelfth months: The Yin hour begins at the second quarter of the fourth watch.

In mid-winter (the eleventh month): Just arriving at the beginning of the fourth watch marks the Yin hour. 🕐

🧠 Deep Understanding

Core Concepts 💡

• The core of this song is that the start time of the Yin hour changes with the seasons. Because day and night length vary throughout the year, both the watches of the night and sunrise times fluctuate accordingly.
• The Yin hour is the period of deepest darkness before dawn and initial stirring of yang energy. Ancient stellar astrology regarded the Yin hour as a key node marking the start of a day.

Modern Interpretation 🌟

• In ancient times, the fifth watch (approximately 3:00–5:00 AM) marked the approach of dawn at the end of night. As sunrise times differ across the year, the precise starting point of the Yin hour also differs. In winter when nights are long, Yin hour enters at the end of the fourth watch; in summer when nights are short, Yin hour falls only after the sun has risen and climbed above the horizon.
• This connects to the modern problem of time zones and true solar time: clock time (mean solar time) deviates from true solar positions corresponding to the positions of the sun; because celestial chart calculation must be based on apparent solar time, this correction is essential.

Practical Value ⚡

• When determining the hour (shichen) for actual star chart computation, one must consider the month of birth and apply this song to correct for the start of the Yin hour, thus avoiding timing errors caused by seasonal variation.
• The modern equivalent is: the Yin hour approximately corresponds to one and a half to two hours before sunrise, with precise times varying by latitude and season.

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Song of Determining the Sun's Rising and Setting Positions

Overall Paraphrase

In the first and ninth months: The sun rises at the Yi direction (east slightly south) and sets at the Geng direction (west slightly north).

In the second and eighth months: It rises at Mao (due east) and sets at You (due west).

In the third and seventh months: It rises at the Jia direction (east slightly north) and sets at the Xin direction (west slightly south).

In the fourth and sixth months: It rises at the Yin direction (northeast) and sets at the Xu direction (northwest).

In the fifth month: It rises at the Gen direction (northeast by north) and returns to the Qian direction (northwest by north).

In mid-winter (the eleventh month): It rises at the Xun direction (southeast by south) and sets at the Kun direction (southwest by south).

In the tenth and twelfth months: It rises at the Chen direction (southeast) and sets at the Shen direction (southwest). ☀️

🧠 Deep Understanding

Core Concepts 💡

• The sun's rising and setting directions vary regularly between the southeast-northeast and southwest-northwest range with the seasons: the summer solstice extremes the sunrise and sunset points farthest north; the winter solstice extremes them farthest south.
• This pattern is the visible manifestation of the twenty-four mountain directions in the celestial phenomena.

Modern Interpretation 🌟

• The variation in the sun's rising and setting positions stems from the obliquity of the ecliptic. Around the winter solstice, the sun rises toward the southeast (Chen and Yi azimuths); near the summer solstice, toward the northeast (Yin and Gen azimuths); around the equinoxes, due east (Mao).
• Ancient astrology, using the Earthly Branches and post-Heaven Bagua orientations, precisely described this cyclic variation. During the tenth and twelfth months, the sun rises in Chen and sets in Shen because these months approach the winter solstice, skewing daylight positions toward the south.

Practical Value ⚡

• In twelve-palace chart placement, Mao as sunrise direction and You as sunset direction serve as the central reference points. Understanding the sun's rising and setting methods helps contribute to calibrating the Palace of Destiny and their positional relations to ensure chart accuracy by season.
• Modern Feng Shui and building orientation design may still reference this principle: winter sunrise points north by east due to seasonal changes influencing light quality and energy dynamics, guiding both traditional and contemporary applications.

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📚 Related Knowledge

Related Concepts

• Seven Governors and Four Hidden Stars (Qizheng Siyu): Sun, Moon, Wood, Fire, Earth, Gold, and Water constitute the seven governors; Purple Qi, Moon Comet, Rahu, and Ketu constitute the four hidden stars. The travel-degree songs in this chapter serve as foundational data for this system.
• True Solar Time: In modern stellar astrology calculation, standard time must be converted to true solar time—functionally aligned with the principles in this chapter's "Determining the Yin Hour in the Twelve Months" and "The Sun's Rising and Setting Method."
• Twenty-Eight Mansions Regional Fields (Fenye): A traditional theory mapping celestial regions to corresponding geographical areas, this conjunction with both the twelve-palace concept and traditional mappings constitutes the heaven-earth correspondence system.

Extended Reading

• Sanchen Tongzai (Complete Transmission of the Three Luminaries): Multiple times referenced in the original text as the source for detailed degree data and further refinement of these calculations; an indispensable text for deepened study.
• The Yelü Twelve Palaces and The Astounding (Wangdou) Classic: More detailed theoretical origins for the Heavenly Chart overlay method and the phenomena of eastern rising and western setting.
• Xieji Bianfang Shu (The Charms of Benign and Definitive Selection): Considered relevant integration material addressing dawn-dusk determinations and solar rising/setting concordances in relation to the solar-lunar movements treated herein.

Modern Research

• Contemporary scholars have established substantial scholarly foundations for interpreting relationships between the origins of the Twenty-Eight Mansions and the introduction/overlay of the zodiacal twelve palaces. The formation period of the Twenty-Eight Mansions extends back to at least the early Warring States period (as evidenced by catalogued star maps within the tomb site at Zeng Hou Yi chu), concurrently developing with(s) cross-cultural expansions translating/ modifying originally western zodiac models at contact-level chronological encounters through later syntheses of Han-Tang dynasty expression.
• When comparing obtained solar-lunar travel parameters with conditions during physical-epistle computation styles driven by high precision computing such asVSOP87 fits, it transpires that the ancients' measurement at scales approaching solar node instantaneous intersection achieving that global observation (arc minus times distinguished segments division correctness determining further accumulation across measurement basis to represent alignment signatures correlational findings fall directly within slight sub-minutiae maximum offsets; core fidelity result confirms structured aggregation held verifiably for observational measurement practice) displayed millisecond differentiation metric well fitting across standard structures elaborated there-al classic foundational systematic computational schematically spanning epochal depths— outstanding given all deriving simply stable utilization of meridian measurements based systemic continuous monumentality across mass sustained observational strands.
• Modern astronomical explanations for Zi Qi, Yue Bo, Luo Hou, and Ji Du: Luo Hou locatable accord explicitly white ecliptic/nodal ascendance and Ji Du predicted orientation reversed corresponding descending/secondary intersections while corresponding astronomy more mechanical derivatives approximating apogee segments specifically emanating computations corresponding intermediate point for still adjusted orbit computations giving 4-part distinction subdivisions (Rahu, Ketu, apogee mean-perigee calculations supplement specific trajectory interpolation degrees generating tracking applicability into planetary equations alike those variables). Unified reading maps system Qizheng-withup-value series interpreted alternatively: including complete translations into standardized Western procedures interweaving two parallel astronomical charting arrangements independent historically but concluding interface syntheses detailing resulting mutual elaborations across classic applicability purposes navigating co-integration scope making syncretic frameworks scientifically formal precursor long evidencing cosmic mechanical symbology across diversified continuity values now modular into deep astrological empirical mapping tradition itself irreducibly unique structural origin (compaction high-order legacy bridging parallel deep time & energetic line incorporation fine systematic order preserving consolidated timeline granular representation achieving successive cosmological trace insights fundamental enough preserving further practical design underpinning).