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Bazi / Four Pillars of Destiny

Bazi means eight characters: year, month, day and hour each receive a Heavenly Stem and Earthly Branch. A chart's calendar calculation is separate from the traditional interpretation of those eight symbols.

Last updated · Jan 14, 2026

Bazi / Four Pillars — Chinese astrology chart

Definition

Bazi means eight characters: year, month, day and hour each receive a Heavenly Stem and Earthly Branch. A chart's calendar calculation is separate from the traditional interpretation of those eight symbols.

Worked example

An illustrative chart written Jia-Zi / Bing-Yin / Jia-Shen / Ji-Si has four pairs. The third pair is the Day Pillar, so Jia is its Day Master. This invented arrangement demonstrates reading positions; it is not a claim about a real person's birth or fate.

Limits

The Hong Kong Observatory supports the stem-branch calendar structure. Classical Bazi texts document interpretation traditions, not their predictive validity. Birthplace, timezone, solar-term boundaries and uncertain time can affect a calculation.

Structure and Relationships

A Bazi chart is structured as four columns (pillars), read from right to left traditionally. Each pillar has two rows: Heavenly Stem on top, Earthly Branch below.

  • 10 Heavenly Stems: 甲乙丙丁戊己庚辛壬癸 (Jia, Yi, Bing, Ding, Wu, Ji, Geng, Xin, Ren, Gui)
  • 12 Earthly Branches: 子丑寅卯辰巳午未申酉戌亥 (Zi, Chou, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu, Hai)
  • Each stem/branch has Five Element and Yin/Yang attributes
  • Hidden Stems: Earthly Branches contain "hidden" stems that add depth to analysis

Relationships between pillars include: combinations (合), clashes (冲), harms (害), and penalties (刑). These modify how elements interact and affect chart dynamics.

How to Read It

Reading Bazi is layered. Start simple, add complexity gradually:

  1. Identify Day Master: What element are you? What's its yin/yang polarity?
  2. Check seasonal strength: Is Day Master strong or weak in the birth month?
  3. Map Ten Gods: What roles do other elements play relative to Day Master?
  4. Look for combinations and clashes: What interactions modify the basic structure?
  5. Consider Luck Pillars: How do 10-year cycles bring different elements into play?
Beginner tip
Don't try to interpret everything at once. Start with Day Master + Month Branch (seasonal context), then gradually add Ten Gods and combinations.

Common Misconceptions

Many misunderstandings come from treating Bazi as a fortune-telling machine instead of reading the whole chart carefully:

  • Treating it as fixed fate prediction and skipping pattern analysis
  • Over-focusing on single elements while ignoring overall structure
  • Assuming "missing element = bad luck" without considering chart balance
  • Taking online auto-generated interpretations as absolute truth
  • Ignoring the importance of Luck Pillars (timing) in chart reading

Sources

The Observatory says the year, month, day and hour Gan-Zhi form Eight Characters. The invented four-pair example checks reading position only; no actual birth or outcome is attributed to it.

Quoted excerpts

The 10 heavenly stems are Jia, Yi, Bing, Ding, Wu, Ji, Geng, Xin, Ren and Gui.
Source: Heavenly Stems and Earthly Branches· Calendar inventory from the Observatory; chart interpretation is a separate tradition.

References

  1. Heavenly Stems and Earthly Branches · Hong Kong Observatory