Qi Men Dun Jia
Cast a chart from the moment you ask. Full Nine Stars, Eight Doors and Eight Gods layout in the classic rotating-plate method, with in-depth AI reading for your decisions
AI Chart Reading
The chart is cast automatically with the hour-based rotating-plate system. Drawing on the Ten Stems interactions and classic structures, the AI reads each palace and points straight to outcomes and timing
Hour-Based Casting
The formation is set by the Four Pillars of the asking moment, with the Chai Bu method determining the Yuan and automatic Yang/Yin Dun detection
In-Depth AI Reading
The AI combines the Use God, Chief and Envoy, and structure verdicts to give concrete, unambiguous judgments
Decision Support
Wealth, career, travel, relationships, lawsuits — ask about any concrete matter and get guidance on outcome and timing
Features
Professional Chart
Chief and Envoy, Three Nobles and Six Yi, Nine Stars, Eight Doors, Eight Gods, plus Emptiness, Horse Star, Punishment, Entombment and Oppressed Doors
Automatic Structures
Ten Stems interactions and classic structures like Green Dragon Returns, Bird Tumbles into Cave and Three Nobles Gaining the Envoy are marked automatically
Follow-Up Questions
Keep asking about the chart — the AI answers based on the original casting
Timezone Safe
Charts are always cast with your local time, accurate wherever you are
Charting Method & Algorithm
This tool uses the hour-based rotating-plate (palace-order) method with Chai Bu formation. Charting is fully automatic under the following rules, each verifiable palace by palace against any professional tool:
- 1Convert the asking moment into the Four Pillars, using exact solar-term and day-boundary times
- 2Yang Dun after Winter Solstice, Yin Dun after Summer Solstice; the day pillar's leader fixes the Yuan, and the classical verse gives the formation number
- 3Lay the earth plate in the order Wu-Ji-Geng-Xin-Ren-Gui-Ding-Bing-Yi, flying forward in Yang Dun and backward in Yin Dun
- 4The hour pillar's Xun head fixes the Chief star and Envoy door; a center-palace Xun head makes Tian Qin the Chief and the Death Door the Envoy
- 5The Chief star follows the Hour Stem; the eight stars rotate in fixed ring order, with Tian Qin traveling beside Tian Rui carrying the center stem
- 6The Envoy door steps through the palaces (center included) by the hour's ordinal within the Xun, and the doors align behind it
- 7The Eight Gods spread from the Chief's palace, clockwise in Yang Dun and counter-clockwise in Yin Dun
- Year pillar
- Changes at the exact moment of Start of Spring
- Month pillar
- Changes at the exact solar-term transition
- Day pillar
- Changes at 23:00; the late Zi hour belongs to the next day
- Hour pillar
- Five Rats method, based on the post-change day stem
Verification & Classical Sources
Every data table — formations, punishments, entombments, horse star and emptiness — has been cross-checked against multiple classical sources. Chart output matches two independent professional charting engines palace by palace across boundary cases (Yang and Yin Dun, Chief in the center palace, full Fu Yin), and those cases run as automated regression tests on every code change.
Structure verdicts are compiled from these standard classics:
- Yan Bo Diao Sou Ge — the foundational verse compendium; original source of formations and structures
- Dun Jia Yan Yi — by Cheng Daosheng (Ming dynasty), included in the Siku Quanshu imperial library
- Qi Men Dun Jia Tong Zong — the widely circulated Ming-Qing compendium
Full algorithm specification and the 134-entry dictionary in the Qi Men Dun Jia Guide →
FAQ
What is Qi Men Dun Jia?
Qi Men Dun Jia is one of the three ancient Chinese divination arts. It casts a chart from a moment in time, combining heavenly timing (Nine Stars), earthly advantage (Eight Doors and Nine Palaces) and human factors (Eight Gods) in one board to judge the outcome and timing of an endeavor. It was historically known as the "art of emperors".
How is the chart cast here?
We use the hour-based rotating-plate method: the formation is determined by the Four Pillars of your asking moment, the Chai Bu method fixes the Upper/Middle/Lower Yuan, and the earth plate, heaven plate, Nine Stars, Eight Doors and Eight Gods are laid out automatically with Emptiness, Horse Star, Punishment, Entombment and structures marked.
What questions are suitable?
Concrete matters with a clear goal work best: wealth, partnerships, job hunting, exams, travel, finding people or items, lawsuits, relationships. The more specific your question, the more targeted the reading.
Do you use Chai Bu or Zhi Run formation?
Chai Bu. The Yuan is derived directly from the day pillar's leader with no manual intercalation — the default of modern professional tools. Every formation rule is published on this page and in the Qi Men Dun Jia Guide for independent verification.
Why do results differ from some other software?
Qi Men has several schools: Chai Bu, Zhi Run, flying plate. Under the same hour-based rotating-plate and Chai Bu convention, this tool matches mainstream professional engines palace by palace (cross-verified on multiple charts). Differences across conventions are school differences, not calculation errors.
How is the day pillar handled after 23:00?
Following the mainstream convention, 23:00 begins the next day's Zi hour: the day pillar rolls over, and the hour pillar is derived from the new day stem via the Five Rats method. Cross-midnight cases are covered by automated tests.
This service is for entertainment purposes only. Important decisions should combine personal knowledge accumulation, life experiences, and professional advice for comprehensive consideration.