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运气与在泉合其气化，阳年曰同天符，阴年曰同岁会。故六十年中，太乙天符四年，天符十
二年，岁会八年，同天符六年，同岁会六年。五者离而言之共三十六年，合而言之止有二十七年。
经言二十四岁者，不言岁会也。变行有多少，病形有微甚，生死有早晏，按经推步，诚可知也。
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天符太乙天符岁会同天符同岁会总歌
司天与运及年支，三位相参太乙符。
运合年支名岁会，土辰四正必同途。
在泉合运阴同岁，阳则同天符可呼。
惟有天符何意取，司天合运是其区。
符，合也。太乙，尊之之号。惟辰戌丑未寄位于子午卯酉四正位主岁会者，余不当止中之
合故耳。邪之中人，太乙暴而死，岁会徐而持，天符速而危。
无论无图，读其歌便谙其义，故录于此。
不及年月干符同，未逢行胜气亦平。
行胜己后行复毕，本气即得正德位。
年前大寒交初气，其日干合年干位。
交气时干或合之。二者皆为平气至。
如丁酉岁木运不及，当金行胜。正月建壬与丁合，此木逢胜。己卯岁土不及，当木行胜。金
行复至，九月建甲与己合，土乃还位，此行胜己后，亦行复己毕也。年日时除交初气，余虽相遇，
不相齐合，谓甲与己合之类是也。
[Diagram of Suihui]
When the Yùn (Climate/Operation) combines with the Qi in the Lower Palace (Zai Quan), the resulting Qi transformation is termed: for Yang years, "Tong Tian Fu" (Same Heaven符); for Yin years, "Tong Sui Hui" (Same Year Meeting). Thus, within a sixty-year cycle, Tai Yi Tian Fu occurs in 4 years, Tian Fu in 12 years, Sui Hui in 8 years, Tong Tian Fu in 6 years, and Tong Sui Hui in 6 years. Counting these five categories separately yields 36 years; counting them collectively yields only 27 years. The classic text mentions 24 years because it does not include Sui Hui. Variations in movement and quantity lead to differences in disease manifestation (mild or severe) and timing of life and death. By following the classics and calculating, this can indeed be known.
[Diagram of Tong Tian Fu and Tong Sui Hui]
*General Song on Tian Fu, Tai Yi Tian Fu, Sui Hui, Tong Tian Fu, and Tong Sui Hui*
When Si Tian (Heavenly Ruler Qi), Yun (Annual Operation), and Nian Zhi (Earthly Branch of the year) interact, they form Tai Yi Tian Fu.
When Yun combines with Nian Zhi, it is named Sui Hui; Earth Yun meeting Chen, Xu, Chou, or Wei (the four cardinal directions) must follow this path.
When Zai Quan combines with Yun, Yin years are Tong Sui Hui, while Yang years are Tong Tian Fu.
Why is Tian Fu singled out? Its meaning lies in Si Tian combining with Yun.
"Fu" means conformity. "Tai Yi" is an honorific title. Only when Chen, Xu, Chou, and Wei (which reside in the positions of Zi, Wu, Mao, You) act as the main Sui Hui do they qualify; other years do not fit the central combination rule. When pathogenic factors attack humans, Tai Yi Tian Fu causes sudden death; Sui Hui leads to a slow but persistent course; Tian Fu results in rapid and critical illness.
Regardless of whether diagrams are present, reading this song allows one to understand its principles, so it is recorded here.
If the Heavenly Stems and Earthly Branches of the year and month do not match, and no Sheng (Overcoming) or Fu (Rebounding) Qi occurs, the climate remains balanced.
After the Sheng Qi passes and the Fu Qi completes its cycle, the Ben Qi (Original Qi) returns to its proper virtuous position.
At the beginning of the first Qi, around the Great Cold solar term, if the day's Stem matches the year's Stem, it indicates balance.
If the Stem at the time of Qi transition also matches, both scenarios indicate the arrival of Ping Qi (Balanced Qi).
For example, in the Ding You year, Wood Yun is insufficient, so Metal Qi acts as Sheng. In the first month, the branch Ren combines with Ding, indicating Wood encountering Sheng (adjustment). In the Ji Mao year, Earth Yun is insufficient, so Wood Qi acts as Sheng. When Metal Qi rebounds (Fu), in the ninth month, the branch Jia combines with Ji, allowing Earth to return to its position. This illustrates the completion of Sheng after overcoming and Fu after rebounding. Except for the transition into the first Qi, interactions among Year, Day, and Hour stems may meet but do not fully align or combine perfectly, such as the case of Jia combining with Ji.