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。
\r五运客图\pt166a2.bmp\r
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。
\r五运主图\pt166a3.bmp\r
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。
\r太少吕图\pt166a4.bmp\r
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。
甲年和己年对应土运，乙年和庚年对应金运，丁年和壬年对应木运，丙年和辛年对应水运，戊年和癸年对应火运。甲为夫，己为妇，二者结合所生的是真土。
以甲子年为例，由土运统领。其中的五运，包括天运、客运和主运。
《五运歌》说：甲己之年为土运，乙庚之年为金运，丁壬之年为木运如树林般繁盛，丙辛之年为长流水，戊癸之年位于离宫称为心（火）。
以甲子年为例，土运承接天运；乙丑年，金运承接天运；丙年和辛年，水运承接天运；丁年和壬年，木运承接天运；戊年和癸年，火运承接天运。假设甲与己化为土运，上半年是甲土运，下半年是己土运。其余年份依此类推。
[图片：五运客图]
以甲子年为例，土运为天运，即为初运。从大寒节气前十三日开始交接初运。乙年为金运，是第二运。丙年为水运，是第三运。丁年为木运，是第四运。戊年为火运，是第五运。
[图片：五运主图]
初运每年以木为主运，第二运火，第三运土，相生相承；第四运金作为常规；第五运寒水长期允许存在。
以每年为例，自大寒交司之日开始，木为主运，火为第二主运，土为第三主运，金为第四主运，水为第五主运。主运、客运和天运，另有推算方法。
[图片：太少吕图]
甲、丙、戊、庚、壬为太（太过），乙、辛、丁、癸、己为少（不及）寻找规律，阳年是太，阴年是少，寄宫所在互不侵犯。
甲在寅位，乙在辰位，丙寄居在辰位，丁在未位，己寄居在巳位，辛寄居在戌位，戊在戌位，癸寄居在丑位。
木角音、火徵音、金商音最为优良，土宫音、水羽音也极好。阳年为太，阴年为少，得地反而成为太少之乡。
以己巳年为例，己寄居在巳位，巳本应是少宫，却变为太宫。辛寄居在戌位，丙戌年，戌内有辛，反而变为少羽。癸丑年，为太徵。丁未年，为太角。庚辰年，乙与庚相合，内有乙，反而变为少商。其余的，阳年为太，阴年为少。那些寄干的，所在的方位，太少相反。其余指的是阴阳年。
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.