8.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, 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 ( 图十一、 十二 )
9.主运角征宫商羽, 五音太少中运取. 如逢太太征太商年, 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. 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 ( 图十三 ).
8. 大寒、立春、雨水、惊蛰对应春季；小满、芒种、夏至、小暑对应夏季；立秋、处暑、白露、秋分对应秋季；立冬、小雪、大雪、冬至对应冬季。按顺序从头数起：初运和大运在春季各主十三日，二运在芒种后十日主事，三运在处暑后七日主事，四运在立冬后四日主事。
【注】天以六为节律，即将二十四节气分为六份，形成六气的六个阶段（六步）。地以五为制度，即将二十四节气分为五份，形成五运的五个位置。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。这是主气和客气分别主管六个阶段的时间划分。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。这是主运和客运分别主管五个位置的时间划分（见图十一、十二）。
9. 主运的声音依次是角、徵、宫、商、羽，五音中的“太”（太过）和“少”（不及）根据中运来确定。如果遇到太徵或太商的年份，那么主运一定是少角、少宫、少羽。如果遇到太角、太宫、太羽的年份，那么主运一定是少商、少徵。用客气的太少来生主运的太少，用主运来定客气，重点在于角和羽。
【注】主运的声音，一定始于角而终于羽，这是因为五音分管四季，顺次布列的常规顺序。然而阳年称为“太”，阴年称为“少”，这是五音四季太过与不及的变化。例如遇到戊年（太徵）或庚年（太商），则主运的初运一定是少角，二运则是太徵，三运一定是少宫，四运则是太商，终运一定是少羽。如果遇到壬年（太角）、甲年（太宫）、丙年（太羽），则主运的初运就是太角，二运一定是少徵，三运就是太宫，四运一定是少商，终运就是太羽。所以说“太”和“少”都以中运为准，这是用客气的中运来推导主运的五运，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，来阐明相加、相临以及太过、不及的道理（见图十三）。
8. Great Cold (Dahan), Beginning of Spring (Lichun), Rain Water (Yushui), and Awakening of Insects (Jingzhe) correspond to Spring; Full Grain (Xiaoman), Grain in Ear (Mangzhong), Summer Solstice (Xiazhi), and Minor Heat (Xiaoshu) correspond to Summer; Beginning of Autumn (Liqiu), Limit of Heat (Chushu), White Dew (Bailu), and Autumn Equinox (Qiufen) correspond to Autumn; Beginning of Winter (Lidong), Minor Snow (Xiaoxue), Major Snow (Daxue), and Winter Solstice (Dongzhi) correspond to Winter. Counting from the beginning: The First Transport (Chu Yun) and Great Transport (Da Yun) each govern thirteen days in Spring; the Second Transport (Er Yun) governs ten days after Mangzhong; the Third Transport (San Yun) governs seven days after Chushu; the Fourth Transport (Si Yun) governs four days after Lidong.
[Note] Heaven uses six as its rhythm, dividing the twenty-four solar terms into six parts, forming the six stages (six steps) of the Six Qi (Six Energies). Earth uses five as its system, dividing the twenty-four solar terms into five parts, forming the five positions of the Five Movements (Wu Yun). Among the twenty-four solar terms, Great Cold, Beginning of Spring, Rain Water, and Awakening of Insects govern the First Qi (Chu Zhi); Spring Equinox, Pure Brightness (Qingming), Grain Rain (Guyu), and Beginning of Summer (Lixia) govern the Second Qi (Er Zhi); Full Grain, Grain in Ear, Summer Solstice, and Minor Heat govern the Third Qi (San Zhi); Great Heat (Dashu), Beginning of Autumn, Limit of Heat, and White Dew govern the Fourth Qi (Si Zhi); Autumn Equinox, Cold Dew (Hanlu), Frost Descent (Shuangjiang), and Beginning of Winter govern the Fifth Qi (Wu Zhi); Minor Snow, Major Snow, Winter Solstice, and Minor Cold (Xiaohan) govern the Final Qi (Zhong Zhi). This is the time division where Host Qi (Zhu Qi) and Guest Qi (Ke Qi) respectively govern the six stages. From Great Cold until twelve days after the Spring Equinox, it governs the First Transport; starting from the thirteenth day after the Spring Equinox until nine days after Grain in Ear, it governs the Second Transport; starting from the tenth day after Grain in Ear until six days after Limit of Heat, it governs the Third Transport; starting from the seventh day after Limit of Heat until three days after Beginning of Winter, it governs the Fourth Transport; starting from the fourth day after Beginning of Winter until the last day of Minor Cold, it governs the Fifth Transport. This is the time division where Host Movement (Zhu Yun) and Guest Movement (Ke Yun) respectively govern the five positions (see Figures 11 and 12).
9. The tones of the Host Movement are Jue (Ang), Zhi (Chih), Gong (Kung), Shang (Shang), and Yu (Yu). The "Tai" (Excess/Superabundance) and "Shao" (Deficiency/Insufficiency) of the Five Tones are determined by the Central Movement (Zhong Yun). If encountering a year of Tai Zhi or Tai Shang, the Host Movement must be Shao Jue, Shao Gong, and Shao Yu. If encountering a year of Tai Jue, Tai Gong, or Tai Yu, the Host Movement must be Shao Shang and Shao Zhi. Using the Tai/Shao of the Guest to generate the Tai/Shao of the Host, and using the Host to determine the Guest, with emphasis on Jue and Yu.
[Note] The tones of the Host Movement always begin with Jue and end with Yu, which is the regular order of the Five Tones governing the four seasons and distributed sequentially. However, Yang years are called "Tai," and Yin years are called "Shao," representing the variations of Excess and Deficiency in the Five Tones and four seasons. For example, in a Wu year (Tai Zhi) or Geng year (Tai Shang), the First Transport of the Host Movement must be Shao Jue, the Second Transport is Tai Zhi, the Third Transport must be Shao Gong, the Fourth Transport is Tai Shang, and the Final Transport must be Shao Yu. If encountering a Ren year (Tai Jue), Jia year (Tai Gong), or Bing year (Tai Yu), the First Transport of the Host Movement is Tai Jue, the Second Transport must be Shao Zhi, the Third Transport is Tai Gong, the Fourth Transport must be Shao Shang, and the Final Transport is Tai Yu. Therefore, it is said that both "Tai" and "Shao" are derived from the Central Movement; this is using the Central Movement of the Guest to derive the Five Movements of the Host, illustrating the principle of Tai/Shao generation. Furthermore, by using the Tai/Shao of the Host to determine the Five Movements of the Guest, applying the method of Tai/Shao superposition, the principles of addition, adjacency, Excess, and Deficiency are elucidated (see Figure 13).