大立雨惊春清谷，立满芒夏小大暑，立处白秋寒霜立，小大冬小从头数。初大二春
十三日，三运芒种十日甫，四运处暑后七日，五运立冬四日主。
【注】天以六为节，谓以二十四气六分分之，为六气之六步也。地以五为制。谓以二
十四气五分分之，为五运之五位也。二十四气，即大寒、立春、雨水、惊蛰，主初之气
也；春分、清明、谷雨、立夏，主二之气也；小满、芒种、夏至、小暑，主三之气也；大
暑、立秋、处暑、白露，主四之气也；秋分、寒露、霜降、立冬，主五之气也；小雪、大
雪、冬至、小寒，主终之气也。此主气、客气分主六步之时也。大寒起，至春分后十二
日，主初运也。春分十三日起，至芒种后九日，主二运也。芒种十日起，至处暑后六日，
主三运也。处暑七日起，至立冬后三日，主四运也。立冬四日起，至小寒末日，主五运
也。此主运客运分主五位之时也。
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\r六气节令图\ps110-4a12.bmp\r
主运角征宫商羽，五音太少中运取。如逢太征太商年，必是少角少宫羽。若逢太角
宫羽年，必是少商与少征。以客取主太少生，以主定客重角羽。
【注】主运之音，必始角而终羽者，乃五音分主四时，顺布之常序也。然阳年为太，阴
年为少者，是五音四时太过不及之变化也。如逢戊年太征，庚年太商之年，则主运初运，必
是少角，二运则是太征，三运必是少宫，四运则是太商，终运必是少羽也。若逢壬年太
角，甲年太宫，丙年太羽之年，则主运初运则是太角，二运必是少征，三运则是太宫，四
运必是少商，终运则是太羽也。故曰太少皆以中运取，此是以客之中运取主之五运，太
少相生之义也。又以主之太少，定客之五运，太少相重之法，以发明相加相临，太过不及之理也。
\r五音太少相生图\ps110-4a13.bmp\r
大寒、立春、雨水、惊蛰为春季；小满、芒种、夏至、小暑为夏季；立秋、处暑、白露、秋分、寒露、霜降为秋季；立冬、小雪、大雪、冬至、小寒为冬季，依此从头推算。初运始于大寒后十三日，二运始于芒种后十日，三运始于处暑后七日，四运始于立冬后四日，五运以此类推。
【注】天以六气为节律，将二十四节气分为六等份，对应六气的六个阶段（六步）。地以五行（五运）为制度，将二十四节气分为五等份，对应五运的五个阶段（五位）。二十四节气中，大寒、立春、雨水、惊蛰主管初之气；春分、清明、谷雨、立夏主管二之气；小满、芒种、夏至、小暑主管三之气；大暑、立秋、处暑、白露主管四之气；秋分、寒露、霜降、立冬主管五之气；小雪、大雪、冬至、小寒主管终之气。这是主气与客气分别主管六个时间段的情况。从大寒开始，到春分后十二日，主管初运；从春分第十三日开始，到芒种后九日，主管二运；从芒种第十日开始，到处暑后六日，主管三运；从处暑第七日开始，到立冬后三日，主管四运；从立冬第四日开始，到小寒最后一天，主管五运。这是主运与客运分别主管五个时间段的情况。
主运按角、徵、宫、商、羽的顺序排列，五音的“太”（太过）与“少”（不及）由中运决定。如果遇到太徵或太商的年份，那么初运必是少角，二运是太徵，三运是少宫，四运是太商，终运是少羽。如果遇到太角、太宫或太羽的年份，那么初运是太角，二运是少徵，三运是太宫，四运是少商，终运是太羽。根据客气的中运来推导主运的太少相生关系，并根据主运的太少来确定客气的五运，通过太少相重的法则，阐明相加相临过程中太过与不及的道理。
【注】主运的声音，必然从角音开始而以羽音结束，这是因为五音分别主管四季，顺次布列是常规顺序。然而阳年称为“太”，阴年称为“少”，这是五音和四季中太过与不及的变化规律。例如遇到戊年太徵、庚年太商的年份，则主运的初运必然是少角，二运则是太徵，三运必然是少宫，四运则是太商，终运必然是少羽。若遇到壬年太角、甲年太宫、丙年太羽的年份，则主运的初运则是太角，二运必然是少徵，三运则是太宫，四运必然是少商，终运则是太羽。所以说“太”和“少”都以中运为准，这是用客气的中运来取主运的五运，体现了太少相生的意义。又通过主运的太少，来确定客气的五运，运用太少相重的方法，来发明相加相临、太过不及的原理。
Great Cold, Beginning of Spring, Rain Water, and Awakening of Insects belong to spring; Full Grain, Grains in Ear, Summer Solstice, and Minor Heat belong to summer; Start of Autumn, End of Heat, White Dew, Autumn Equinox, Cold Dew, and Frost's Descent belong to autumn; Start of Winter, Minor Snow, Major Snow, Winter Solstice, and Minor Cold belong to winter. Counting from the beginning: The first period (Yun) begins thirteen days after Great Cold; the second period begins ten days after Grains in Ear; the third period begins seven days after End of Heat; the fourth period begins four days after Start of Winter; and so on.
[Note] Heaven uses Six Qi as its rhythm, dividing the twenty-four solar terms into six parts, corresponding to the six steps of the Six Qi. Earth uses Five Movements (Wu Yun) as its system, dividing the twenty-four solar terms into five parts, corresponding to the five positions of the Five Movements. Among the twenty-four solar terms, Great Cold, Beginning of Spring, Rain Water, and Awakening of Insects govern the First Qi; Spring Equinox, Pure Brightness, Grain Rain, and Start of Summer govern the Second Qi; Full Grain, Grains in Ear, Summer Solstice, and Minor Heat govern the Third Qi; Major Heat, Start of Autumn, End of Heat, and White Dew govern the Fourth Qi; Autumn Equinox, Cold Dew, Frost's Descent, and Start of Winter govern the Fifth Qi; Minor Snow, Major Snow, Winter Solstice, and Minor Cold govern the Final Qi. This describes when the Host Qi (Zhu Qi) and Guest Qi (Ke Qi) respectively govern the six time periods. From Great Cold until twelve days after the Spring Equinox, it governs the First Movement (Yun); from the thirteenth day after the Spring Equinox until nine days after Grains in Ear, it governs the Second Movement; from the tenth day after Grains in Ear until six days after End of Heat, it governs the Third Movement; from the seventh day after End of Heat until three days after Start of Winter, it governs the Fourth Movement; from the fourth day after Start of Winter until the last day of Minor Cold, it governs the Fifth Movement. This describes when the Host Movement (Zhu Yun) and Guest Movement (Ke Yun) respectively govern the five time periods.
The Host Movements follow the sequence of Jue (Wood), Zhi (Fire), Gong (Earth), Shang (Metal), and Yu (Water). The "Tai" (Excess/Superabundance) and "Shao" (Deficiency/Insufficiency) of the five tones are determined by the Central Movement (Zhong Yun). If encountering a year with Tai Zhi or Tai Shang, then the First Movement must be Shao Jue, the Second Movement is Tai Zhi, the Third Movement is Shao Gong, the Fourth Movement is Tai Shang, and the Final Movement is Shao Yu. If encountering a year with Tai Jue, Tai Gong, or Tai Yu, then the First Movement is Tai Jue, the Second Movement is Shao Zhi, the Third Movement is Tai Gong, the Fourth Movement is Shao Shang, and the Final Movement is Tai Yu. By taking the Guest's Central Movement to derive the Host's Tai/Shao generation relationship, and using the Host's Tai/Shao to determine the Guest's Five Movements, through the method of Tai/Shao overlapping, the principles of addition and proximity, as well as excess and deficiency, are elucidated.
[Note] The tones of the Host Movement necessarily begin with Jue and end with Yu, which is the regular order where the five tones respectively govern the four seasons and are distributed sequentially. However, Yang years are called "Tai," and Yin years are called "Shao," representing the variations of excess and deficiency among the five tones and four seasons. For instance, in a Wu year with Tai Zhi or a Geng year with Tai Shang, the Host Movement's First Movement is necessarily Shao Jue, the Second Movement is Tai Zhi, the Third Movement is Shao Gong, the Fourth Movement is Tai Shang, and the Final Movement is Shao Yu. In an Ren year with Tai Jue, a Jia year with Tai Gong, or a Bing year with Tai Yu, the Host Movement's First Movement is Tai Jue, the Second Movement is Shao Zhi, the Third Movement is Tai Gong, the Fourth Movement is Shao Shang, and the Final Movement is Tai Yu. Therefore, it is said that both "Tai" and "Shao" are derived from the Central Movement; this means using the Guest's Central Movement to determine the Host's Five Movements, illustrating the meaning of Tai/Shao generation. Furthermore, by using the Host's Tai/Shao to determine the Guest's Five Movements, applying the method of Tai/Shao overlapping, the principles of addition, proximity, excess, and deficiency are revealed.