📊 BaZi Technical Reference

The Essential Data for Precise Metaphysical Calculation

1. The 10 Heavenly Stems (十天干)

StemPinyinElementPolaritySymbolic Nature
甲JiǎWoodYangTall forest trees, pillars, sturdy and upright.
乙YǐWoodYinFlowers, vines, creeping plants, flexible and soft.
丙BǐngFireYangThe Sun, radiant heat, illuminating and generous.
丁DīngFireYinCandle flame, lamp, refined heat, meticulous.
戊WùEarthYangMountain, high ground, solid and protective.
己JǐEarthYinGarden soil, fertile ground, nurturing and receptive.
庚GēngMetalYangAxe, raw iron, sword, sharp and decisive.
辛XīnMetalYinJewelry, refined gold, needle, elegant and precise.
壬RénWaterYangOcean, mighty river, expansive and powerful.
癸GuǐWaterYinRain, dew, mist, penetrating and subtle.

2. The 12 Earthly Branches & Hidden Stems (地支藏干)

Every branch contains 1-3 "Hidden Stems" (Cang Gan) representing the internal quality of the Qi.

BranchZodiacMonthMain StemResidual StemsSeason
寅 (Yin)Tiger1st甲 (Wood)丙 (Fire), 戊 (Earth)Early Spring
卯 (Mao)Rabbit2nd乙 (Wood)—Mid Spring
辰 (Chen)Dragon3rd戊 (Earth)乙 (Wood), 癸 (Water)Late Spring
巳 (Si)Snake4th丙 (Fire)庚 (Metal), 戊 (Earth)Early Summer
午 (Wu)Horse5th丁 (Fire)己 (Earth)Mid Summer
未 (Wei)Goat6th己 (Earth)丁 (Fire), 乙 (Wood)Late Summer
申 (Shen)Monkey7th庚 (Metal)壬 (Water), 戊 (Earth)Early Autumn
酉 (You)Rooster8th辛 (Metal)—Mid Autumn
戌 (Xu)Dog9th戊 (Earth)辛 (Metal), 丁 (Fire)Late Autumn
亥 (Hai)Pig10th壬 (Water)甲 (Wood)Early Winter
子 (Zi)Rat11th癸 (Water)—Mid Winter
丑 (Chou)Ox12th己 (Earth)癸 (Water), 辛 (Metal)Late Winter

3. The 10 Gods (十神关系表)

The 10 Gods represent the relational archetype between the Day Master and every other character in the chart.

RelationGod TypeSame PolarityOpposite Polarity
SelfCompanion比肩 (Friend)劫财 (Rob Wealth)
I CreateOutput食神 (Eating God)伤官 (Hurting Officer)
I ControlWealth偏财 (Indirect Wealth)正财 (Direct Wealth)
Controls MeAuthority七杀 (7-Killings)正官 (Direct Officer)
Creates MeResource偏印 (Owl/Ind. Seal)正印 (Direct Seal)

4. Five Element Cycles (五行生剋)

Generation Cycle (相生)

Wood → Fire → Earth → Metal → Water → Wood

Meaning: Giving, supporting, and nourishing.

Conquest Cycle (相剋)

Wood → Earth → Water → Fire → Metal → Wood

Meaning: Controlling, restraining, and attacking.

5. 12 Life Stages (十二長生)

Determines the strength of a Heavenly Stem based on its sitting Earthly Branch.

#StageChineseEnergy Level
1Birth長生 (Chang Sheng)Strong Growth
2Bathing沐浴 (Mu Yu)Vulnerable / Sexual
3Grooming冠帶 (Guan Dai)Preparation
4Official臨官 (Lin Guan)Peak Performance
5Emperor帝旺 (Di Wang)Maximum Strength
6Decline衰 (Shuai)Weakening
7Sickness病 (Bing)Low Energy
8Death死 (Si)Endings
9Tomb墓 (Mu)Storage / Hidden
10Extinction絕 (Jue)Severance
11Gestation胎 (Tai)Conception
12Nourishment養 (Yang)Rebuilding

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