Three Yuan and Nine Bureaus in Qimen Calculation
Each solar term has three bureau numbers, one for Upper, Middle, and Lower Yuan. The combination of solar term, Yuan, and Yin or Yang Dun selects a bureau…
Overview
Each solar term has three bureau numbers, one for Upper, Middle, and Lower Yuan. The combination of solar term, Yuan, and Yin or Yang Dun selects a bureau from one to nine and fixes the earth-plate starting point and direction. Under Chaibu, a day-leader Fu Tou selects the Yuan inside the current solar term’s sequence. The audit should preserve the solar term, Fu Tou, Yuan, Dun, and resulting bureau rather than only the final number.
At a glance
- Page role
- Reproducible calculation rule
- Terms covered
- upper middle lower Yuan · Qimen bureau
- Verification focus
- Under Chaibu, a day-leader Fu Tou selects the Yuan inside the current solar term’s sequence. The audit should preserve the solar term, Fu Tou, Yuan, Dun, and resulting bureau rather than only the final number.
- Stop rule
- Do not mix Chaibu and Zhirun Yuan selection inside one chart. If the Yuan method changes, issue a separately named result and recalculate every dependent field.
Direct answer and scope
Each solar term has three bureau numbers, one for Upper, Middle, and Lower Yuan. The combination of solar term, Yuan, and Yin or Yang Dun selects a bureau from one to nine and fixes the earth-plate starting point and direction.
- Names and related terms: upper middle lower Yuan
- Names and related terms: Qimen bureau
How the rule is formed or checked
Under Chaibu, a day-leader Fu Tou selects the Yuan inside the current solar term’s sequence. The audit should preserve the solar term, Fu Tou, Yuan, Dun, and resulting bureau rather than only the final number.
Keep the cast moment, UTC offset, method version, palace, and interacting symbols visible before adopting an interpretation.
How to use this in a reading
Treat bureau as a calculation coordinate, not a fortune score. It determines placement; meaning comes only after the finished board and question anchors are known.
- Name the visible chart fact before assigning symbolic meaning.
- Compare the asker and matter anchors with every layer in their palaces.
- Record at least one supporting condition and one counter-signal.
- End with a reversible action and an observable review point.
Worked contrast
The same solar term can produce three different bureaus across its Upper, Middle, and Lower Yuan. A lookup that uses only the month or term name and ignores Fu Tou can therefore be internally consistent yet wrong for the chosen method.
Common mistake and limit
Do not mix Chaibu and Zhirun Yuan selection inside one chart. If the Yuan method changes, issue a separately named result and recalculate every dependent field.
Sources and editorial basis
- 《煙波釣叟歌》Wikisource lines 112–220: nine palaces, 陰陽遁, 三元, 值符/值使, 三奇六儀, 伏吟/反吟, gates, stars, vigor, 擊刑, 入墓, and selected patterns.A public-domain classical verse used only for the rule passages it actually states, including nine palaces, Yin and Yang Dun, Three Wonders and Six Instruments, Chief Star and Gate, gate and star sequences, vigor, and selected conditions. Legendary origin verses are not presented as verified history.
- NCC-T06 奇門遁甲專業版操作手冊NCC-T06 manual setting and board-field sections: configurable plate, center, bureau, deity, and day-boundary axes; used as evidence of modern method variation only.A modern professional-software manual used to document that plate, center, bureau, deity, and day-boundary settings vary. It is evidence of configurable practice, not an independent historical authority or accuracy study.
- OpenFate Qimen hour-chart methodOpenFate docs/QIMEN_SYSTEM.md, “Professional calculation contract,” “Interpretation and evidence contract,” and “Rule-source map,” source-reviewed 2026-09-12.Product-specific reference for OpenFate’s fixed-offset civil-time, hour-Qimen, rotating-plate, Chaibu implementation and its deterministic chart fields. A source review on 2026-09-12 does not prove live deployment, other schools, or predictive validity.