置大寒交司五十九日，加司天化数、支数、干迁数，三数化数，太阴湿土五支数，丑五干迁
数，自寄干迁，至交，计几位。癸寄丑，更不迁动，只得一位。一数三位，并得一十一，并交司
五十九，计得七十，进二位，作七千。《天元玉册》云∶阳年减四十九，阴年加四十五。今癸丑
年，阴年，加四十五，计得七千四十五。以四十五除之，外有五，命元首宫。除之五，天禽宫，
为元首宫先除五。运气不入中宫，不叠六，只在四宫，今癸丑年司天，在四宫，天辅宫也。
申子辰三年，乃一六天，自寅初水下一刻交（大寒寅初一刻交初之气）。司天之气。巳酉丑三年，
乃二六天，自巳初一刻交。自寅至巳，计二十六刻，交司天初气。寅午戌三年乃三六天，自申初
一刻交。寅至申，五十一刻，交司天初气。亥卯未三年，乃四六天，自亥初一刻交。寅至亥，七
十五刻，交司天初气。
每一昼夜，计一百刻，每时共八刻二十分，六十分，又为一刻也。假令癸丑年二六天，巳初
一刻交。自巳初一刻，寅初漏水下一刻，寅上八刻二十分，卯上八刻二十分，辰上八刻二十分，
三八二十四刻，寅卯辰各二十分，计二十六刻，交得太阴湿土司天。厥阴风木之分二十六刻，已
前属上年太阳终之气二十六刻，已后属今年厥阴风木。
Add the fifty-nine days after the Jiaosi (the moment of solar term transition) to the Si Tian Hua Shu (number of transformation of the ruling Qi), the Zhi Shu (Earthly Branch number), and the Gan Qian Shu (Heavenly Stem migration number). The sum of these three numbers is calculated. For Taiyin Shitu (Taiyin Damp Earth), the Zhi Shu is five. Regarding the Gan Qian Shu, the Gui stem resides in the Chou position and does not migrate further, thus counting as only one position. Adding one number to three positions yields eleven. Adding this to the fifty-nine days of Jiaosi results in a total of seventy. Advancing two places converts this into seven thousand. The *Tianyuan Yuce* states: for Yang years, subtract forty-nine; for Yin years, add forty-five. Since the year of Gui Chou is a Yin year, we add forty-five, resulting in a total of seven thousand and forty-five. Dividing this by forty-five leaves a remainder of five, which determines the Yuanshou Gong (Head Palace). Dividing by five again corresponds to the Tianqin Gong (Heavenly Bird Palace), because the Yuanshou Gong first subtracted five. The Yunqi (Luck and Qi) does not enter the Zhonggong (Central Palace) nor stack six, but operates within four palaces. In the year of Gui Chou, the Si Tian (Ruling Qi) is located in the fourth palace, which is the Tianfu Gong (Heavenly Assistant Palace).
In the years of Shen, Zi, and Chen, it is a Yi-Liu Tian (One-Six Heaven), transitioning at the beginning of the Yin hour (Da Han solar term transitions at the first minute of the Yin hour, marking the start of the First Qi). This refers to the transition of the Si Tian Qi (Ruling Qi). In the years of Si, You, and Chou, it is an Er-Liu Tian (Two-Six Heaven), transitioning at the first minute of the Si hour. From the Yin hour to the Si hour, there are twenty-six ke (quarter-hours), marking the transition of the First Qi of the Si Tian. In the years of Yin, Wu, and Xu, it is a San-Liu Tian (Three-Six Heaven), transitioning at the first minute of the Shen hour. From the Yin hour to the Shen hour, there are fifty-one ke, marking the transition of the First Qi of the Si Tian. In the years of Hai, Mao, and Wei, it is a Si-Liu Tian (Four-Six Heaven), transitioning at the first minute of the Hai hour. From the Yin hour to the Hai hour, there are seventy-five ke, marking the transition of the First Qi of the Si Tian.
A full day and night is calculated as one hundred ke. Each shi (two-hour period) consists of eight ke and twenty fen (minutes), where sixty fen equals one ke. For example, in the year of Gui Chou, which is an Er-Liu Tian, the transition occurs at the first minute of the Si hour. Calculating backward from the first minute of the Si hour to the first minute of the Yin hour (water clock time): the Yin hour has eight ke and twenty fen, the Mao hour has eight ke and twenty fen, and the Chen hour has eight ke and twenty fen. These three hours total twenty-four ke. Adding the twenty fen from each of the Yin, Mao, and Chen hours totals twenty-six ke. At this point, the Taiyin Shitu (Taiyin Damp Earth) Si Tian Qi is received. The segment of Jueyin Fengmu (Jueyin Wind Wood) occupies twenty-six ke. Prior to this, it belongs to the last twenty-six ke of the previous year's Taiyang (Taiyang Solar Qi); thereafter, it belongs to this year's Jueyin Fengmu.