What Is Bazi? (八字)
Learn what Bazi or Four Pillars is, how eight stem-branch characters are calculated, what a chart can describe, and where responsible interpretation stops.
Overview
Bazi, also called the Four Pillars of Destiny, represents a birth moment with four stem-branch pairs for the year, month, day, and hour. The resulting eight visible characters form a traditional Chinese calendrical and interpretive system. Calculation can be reproduced from time rules; interpretation remains a source-based cultural framework rather than scientific proof or a fixed life sentence.
At a glance
- Literal meaning
- Eight characters
- Chart structure
- Year, Month, Day, and Hour Pillars
- Each pillar
- One Heavenly Stem and one Earthly Branch
- Reference center
- The Day Stem or Day Master
- Timing layers
- Luck Pillars and annual influences
- Boundary
- Traditional analysis, not scientific or professional advice
Bazi records one moment as four valid pairs
The year, month, day, and hour each map to one pair in the sixty stem-branch cycle. Together they produce four pillars and eight visible characters.
Branches also contain hidden stems, but those are derived analytical contents rather than extra birth characters. The base chart remains the same four calculated pairs.
- Verify the birth data and boundary rules first.
- Keep visible characters and hidden stems distinct.
Calculation and interpretation are different layers
Calendar, time-zone, solar-term, and day-boundary rules determine the pillars. Those deterministic steps should return the same result for the same declared inputs and conventions.
Traditional interpretation then compares season, roots, Ten Gods, combinations, clashes, patterns, and timing. Different schools may weigh this evidence differently.
- Publish the calculation convention.
- Name the interpretive method when schools differ.
A chart organizes questions rather than certainties
Bazi can organize traditional hypotheses about balance, roles, relationships, and periods of change. A useful reading shows which symbols support each claim and what evidence would weaken it.
Luck cycles add temporary context to the natal chart; they do not rewrite the original four pillars or guarantee that a symbolic theme becomes an event.
- Link every interpretation to chart evidence.
- Separate natal structure from timing activation.
Bazi is not a substitute for direct evidence
A chart cannot prove personality, health, wealth, legal status, compatibility, or future events. Medical, legal, financial, and safety decisions require qualified evidence outside astrology.
OpenFate presents Bazi as interpretable cultural material, labels uncertainty, and keeps calculation results separate from editorial explanation.
- Avoid deterministic or fear-based claims.
- Use real-world facts for high-stakes decisions.
Sources and editorial basis
- Hong Kong Observatory: Heavenly Stems and Earthly Branches天文台天干地支說明：十干、十二支與六十甲子的曆法基礎An official modern reference for the canonical stem and branch orders, the sexagenary cycle, and calendrical use.
- 《淵海子平》 (Yuanhai Ziping)《淵海子平》「論日為主」及干支諸論：以四柱干支建立命局A foundational Ziping reference for branch months, hidden stems, roots, and stem-branch relationships.
- OpenFate Editorial Methodology八字定義頁分開可重現排盤、傳統解釋與現代專業建議界線OpenFate separates deterministic chart calculation, traditional interpretation, and modern editorial explanation.