甲己土运，乙庚金运，丁壬木运，丙辛水运，戊癸火运。甲乃为夫，己乃为妇，所生真土也。
假令甲子年，土运统之，其五运者，有天运，有客运，有主运也。
五运歌曰∶甲己土运乙庚金，丁壬木运尽成林，丙辛便是长流水，戊癸离宫号曰心。
假令甲子年，土运承天，乙丑年，金运承天，丙辛年，水运承天，丁壬年，木运承天，戊癸
年，火运承天。假令甲与己为土运，上半年乃甲土运，下半年己土运。余仿此。
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假令甲子年，土为天运，便为初运。自大寒前十三日交初之运。乙为金运，乃第二运也。丙
为水运，乃第三运也。丁为木运，第四运也。戊为火运，第五运也。
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初运逐年木为主，二火三土相生取，四来是金以为常，五运寒水长相许。
假令逐年自大寒交司日木为主运，火为二之主运，土为三之主运，金为四之主运，水为五
之主运。主客天运，另有运策。
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甲丙戊庚壬为太，乙辛丁癸己少寻，阳年是太阴年少，寄宫所在不相侵。
甲在寅，乙在辰，丙寄辰，丁在未，己寄巳，辛寄戌，戊在戌，癸寄丑。
木角火征金为商，土宫水羽最为良，阳年为太阴年少，得地反为太少乡。
假令己巳年，己寄巳，巳本是少宫，却为太宫。辛寄戌，丙戌年，戌内有辛，反为少羽。癸
丑年，为太征。丁未年，为太角。庚辰年，乙与庚合，内有乙，反为少商。余者，阳年为太，
阴少也。其寄干者，所在之处，太少相反也。其余谓阴阳年也。
又法，假令甲子年，便为太宫，乙丑年为少商，丙庚年为太羽，丁卯年为少角，戊辰年为太征。
Jia and Ji years correspond to the Earth phase (Earth Yun), Yi and Geng years to the Metal phase (Metal Yun), Ding and Ren years to the Wood phase (Wood Yun), Bing and Xin years to the Water phase (Water Yun), and Wu and Gui years to the Fire phase (Fire Yun). Jia acts as the husband, Ji as the wife, generating the true Earth.
Taking the year of Jia-Zi as an example, the Earth phase governs. The Five Phases (Wu Yun) include Heavenly Phase (Tian Yun), Guest Phase (Ke Yun), and Host Phase (Zhu Yun).
The Song of Five Phases states: In Jia and Ji years, the phase is Earth; in Yi and Geng years, the phase is Metal; in Ding and Ren years, the phase is Wood, flourishing like a forest; in Bing and Xin years, it is the long-flowing Water; in Wu and Gui years, located in the Li Palace, it is called Heart (Fire).
Taking the year of Jia-Zi as an example, the Earth phase receives the Heavenly Phase; in the year of Yi-Chou, the Metal phase receives the Heavenly Phase; in Bing and Xin years, the Water phase receives the Heavenly Phase; in Ding and Ren years, the Wood phase receives the Heavenly Phase; in Wu and Gui years, the Fire phase receives the Heavenly Phase. Assuming Jia and Ji transform into the Earth phase, the first half of the year is governed by Jia Earth, and the second half by Ji Earth. The rest follow this pattern.
[Image: Chart of Guest Five Phases]
Taking the year of Jia-Zi as an example, the Earth phase is the Heavenly Phase and thus becomes the Initial Phase. Thirteen days before the solar term Da Han (Great Cold), the Initial Phase begins. The Yi year is the Metal phase, which is the Second Phase. The Bing year is the Water phase, which is the Third Phase. The Ding year is the Wood phase, which is the Fourth Phase. The Wu year is the Fire phase, which is the Fifth Phase.
[Image: Chart of Host Five Phases]
The Initial Phase each year takes Wood as the Host Phase; the Second is Fire, the Third is Earth, following mutual generation; the Fourth is Metal as the norm; the Fifth is Cold Water, permitted continuously.
Taking each year as an example, starting from the day of Jiao Si (transition) at Da Han, Wood is the Host Phase, Fire is the Second Host Phase, Earth is the Third Host Phase, Metal is the Fourth Host Phase, and Water is the Fifth Host Phase. Host, Guest, and Heavenly Phases have separate calculation methods.
[Image: Chart of Tai-Shao Lv]
Jia, Bing, Wu, Geng, and Ren are Tai (Excess); Yi, Xin, Ding, Gui, and Ji are Shao (Deficiency). Seek the pattern: Yang years are Tai, Yin years are Shao. The locations of borrowed palaces do not interfere with each other.
Jia is in Yin, Yi is in Chen, Bing borrows Chen, Ding is in Wei, Ji borrows Si, Xin borrows Xu, Wu is in Xu, Gui borrows Chou.
Wood (Jue), Fire (Zhi), and Metal (Shang) tones are excellent; Earth (Gong) and Water (Yu) tones are also very good. Yang years are Tai, Yin years are Shao. Obtaining the location reverses Tai and Shao.
Taking the year of Ji-Si as an example, Ji borrows Si. Si originally should be Shao Gong, but becomes Tai Gong. Xin borrows Xu. In the year of Bing-Xu, within Xu is Xin, which reverses to become Shao Yu. In the year of Gui-Chou, it is Tai Zhi. In the year of Ding-Wei, it is Tai Jue. In the year of Geng-Chen, Yi combines with Geng, containing Yi, which reverses to become Shao Shang. For the rest, Yang years are Tai, Yin years are Shao. For those borrowing stems, the location reverses Tai and Shao. The rest refers to Yin-Yang years.
Another method: Taking the year of Jia-Zi as an example, it is Tai Gong; Yi-Chou year is Shao Shang; Bing and Geng years are Tai Yu; Ding-Mao year is Shao Jue; Wu-Chen year is Tai Zhi.