Heavenly Stems, Earthly Branches and Five Elements: How a Chart Is Built

A common beginner problem in Zi Wei Dou Shu, the Chinese system of Purple Star Astrology, goes like this: the same person's birth data goes into two different programs, and one says Metal Four Bureau while the other says Earth Five Bureau. Which one is wrong? Usually neither. The programs received slightly different input, and three sets of symbols, the heavenly stems, the earthly branches and the five elements, interlock in ways that amplify small differences. This article walks through a fictional example in the order a chart is actually built. The person and data are invented for illustration and are not a real individual.

Step zero: the hour that is not one hour

The example person was born in 1990 and the hour was entered as "Zi," the midnight hour. One program treated it as early Zi, the first hour after midnight. The other treated it as late Zi, the last hour before midnight. The Life Palace (命宮) landed in a different place, which changed everything after it. Some schools even count a late Zi birth as belonging to the next day, so the date itself can shift by one.

Anyone born between eleven at night and one in the morning should first confirm whether the birth came before or after midnight. These details do not show up on the screen, yet they are where most beginners go wrong. When the birth hour is uncertain, build the chart for neighboring hours too and check whether the Life Palace and the bureau change. If all three agree, the uncertainty barely matters for the major cycle. If they differ, ask family for the birth record before choosing one chart.

Giving the twelve palaces their stems

The year 1990 is a Geng-Wu year. Geng is a heavenly stem and Wu is an earthly branch. There are ten stems, from Jia to Gui, and twelve branches, from Zi to Hai, and pairing them in order produces a cycle of sixty. The twelve palaces of a chart carry only branches at first, so the birth-year stem must supply their stems, by a method called "Five Tigers Escape" (五虎遁). Years Jia and Ji start the Yin palace at Bing, years Yi and Geng start it at Wu, years Bing and Xin at Geng, years Ding and Ren at Ren, and years Wu and Gui at Jia.

Geng belongs to the Yi-Geng group, so the Yin palace is Wu-Yin, the Mao palace is Ji-Mao, the Chen palace is Geng-Chen, the Si palace is Xin-Si, and so on until all twelve palaces have full stem-branch names.

Next is the Life Palace. Suppose the example person's Life Palace falls in Chen, which makes it Geng-Chen. In the traditional sixty-cycle sound table, Geng-Chen belongs to "white wax metal," so this person has the Metal Four Bureau. Had a small input difference moved the Life Palace to Mao, which is Ji-Mao and belongs to "city wall earth," the result would be the Earth Five Bureau. That is exactly how two programs can disagree without either being broken.

What a bureau does, and what it does not

The five bureaus, Water Two, Wood Three, Metal Four, Earth Five and Fire Six, have only two jobs. The first is to fix the starting point of Zi Wei (紫微), the emperor star, from which the other major stars are laid out. The same lunar birthday with a different bureau puts Zi Wei in a different place and changes the entire layout. The second job is to set the starting age of the first major cycle: age two for Water, three for Wood, four for Metal, five for Earth and six for Fire, and a new palace every ten years thereafter. Our Metal Four example enters the second cycle at fourteen and the third at twenty-four.

People often ask whether Earth Five is better than Metal Four. It is not. The bureaus differ only in where the timeline begins, not in quality.

The five elements here are not used the way they are in other systems. Many readers see "five elements" and think "lacking metal, add metal." That belongs to Bazi, another Chinese system. In Zi Wei Dou Shu the bureau is a calculation device that decides where stars fall and how cycles run, not a diagnosis of what you lack. Mixing the two produces advice that contradicts itself.

For reference, the elements attach to the stems as pairs: Jia and Yi are wood, Bing and Ding are fire, Wu and Ji are earth, Geng and Xin are metal, and Ren and Gui are water. The branches are Zi and Hai water, Yin and Mao wood, Si and Wu fire, Shen and You metal, and Chou, Chen, Wei and Xu earth.

It decides the birth-year transformations, the Hua Lu (化祿), Hua Quan (化權), Hua Ke (化科) and Hua Ji (化忌) that fall on specific stars. Our example person, born in a Geng year, has Tai Yang (太陽) Hua Lu, Wu Qu (武曲) Hua Quan, Tai Yin (太陰) Hua Ke and Tian Tong (天同) Hua Ji. Everyone born in a Geng year shares this set. The other nine stems give nine other sets, which this site's engine uses in the Zhongzhou school version: Jia gives Lian Zhen, Po Jun, Wu Qu and Tai Yang; Yi gives Tian Ji, Tian Liang, Zi Wei and Tai Yin; Bing gives Tian Tong, Tian Ji, Wen Chang and Lian Zhen; Ding gives Tai Yin, Tian Tong, Tian Ji and Ju Men; Wu gives Tan Lang, Tai Yin, You Bi and Tian Ji; Ji gives Wu Qu, Tan Lang, Tian Liang and Wen Qu; Xin gives Ju Men, Tai Yang, Wen Qu and Wen Chang; Ren gives Tian Liang, Zi Wei, Zuo Fu and Wu Qu; Gui gives Po Jun, Ju Men, Tai Yin and Tan Lang, each time in the order Hua Lu, Hua Quan, Hua Ke, Hua Ji.

The schools disagree about the Hua Ke star for Wu, Geng and Ren years. Some books give Tai Yang or Tian Fu. If another book or program differs only in those three years, the likely cause is a different school, not an error. The movement of the four transformations is explained in Four Transformations in Zi Wei Dou Shu: How Life Forces Shift.

When you check your own chart, make three confirmations: the birth-year stem and where its transformations land; the stem-branch of the Life Palace and its bureau; and the age at which your first major cycle begins. Once those agree, everything built on them rests on a sound base. Build a chart with the chart tool, then read about what each palace means in Complete Analysis of the Twelve Palaces in Zi Wei Dou Shu.

References

• Wang Tingzhi, Zhongzhou School Zi Wei Dou Shu (中州派紫微斗數), as summarized in this site's knowledge base. Paraphrased, not quoted.

This content was AI-assisted and reviewed by our editorial team. For entertainment and cultural reference only.