History & development
Qi Men Dun Jia, Da Liu Ren and Tai Yi are three distinct Chinese divination systems often grouped as the three cosmic boards. Ho Peng Yoke’s historical study documents their place in the astronomical bureau and their use for interpreting natural events and human affairs.
Mythology & symbolic world
Board imagery includes named deities, gates or cosmic correspondences according to the particular system. Such language expresses a symbolic model of order. It does not make the boards three interchangeable maps of visible planetary positions.
Provenance: where the rules come from
This is a comparative gateway, not a composite algorithm. Ho’s separate chapters on Tai Yi, Qi Men and Liu Ren are the research starting point; each requires its own transmitted rules and test cases.
How it is calculated
Choices that change the result: Listed as adjacent traditions; separate rulebooks and validation corpus not established.
Inspect your calculated data →Uses & use cases
- Study historically documented event-based divination.
- Compare how different board traditions represent the same question or moment.
Interpretation methods
Choose one board tradition
Specify the system, question time, calendar convention and board-construction method; assign the relevant symbols before applying that source’s relational rules.
An event time can be shared input across three boards while their internal objects and reading procedures remain different.
Concepts in this tradition
Follow a term for its definition, word origin, evidence and connected ideas.
Disagreements & limits
- The registry does not calculate these boards yet.
- Claims of secret imperial origins or legendary military success require independent historical evidence.
- A BaZi chart cannot be relabelled as one of these systems merely because both use stems and branches.
Sources & evidence
Practitioner sources describe their own systems. Historical and astronomical sources support different kinds of claims. Reading exercises are editorial teaching examples.
- Chinese Mathematical Astrology — Ho Peng Yoke, 2003 ↗scholarly monograph, publisher description
- Heavenly Stems and Earthly Branches — Hong Kong Observatory ↗government calendrical explanation