Qi Men Dun Jia Chart Setup: Chai Bu, Three Yuan and Ju Numbers

Follow the production rotating-plate engine through the term, day head and yuan table.

Fixed conventions

This example uses an hourly rotating plate, chai-bu, centre lodged in Kun 2, and Tianqin following Tianrui. Terms use the original absolute instant; day and hour use local solar time.

Input and term

Input 2024-02-04 18:00 +08:00 at 120°E. Production pillars are 甲辰, 丙寅, 戊戌, 辛酉. The instant is after Start of Spring and in the yang-dun half of the year.

Cast my Qimen chart

Find the day head and yuan

Counting back from 戊戌 to the nearest Jia or Ji day gives 甲午. Wu belongs to the Zi/Wu/Mao/You upper-yuan group. The day head is independent of the term boundary.

Look up the ju

Start of Spring uses yang-dun 8/5/2 for upper/middle/lower yuan, giving ju 8 here. Record differing plate or intercalation methods before comparing calculators. This checks a construction procedure, not prediction performance.

Continue to an actual reading

The existing divination workspace requires sign-in. AI readings follow account credit limits and the price shown in the product. The public teaching inputs on this page require no account.

Public teaching record · 2026-10-26.1

Expand raw machine fields · 2024-02-04T18:00:00+08:00; longitude 120; rotating plate, chai-bu

{
  "dun": "阳遁",
  "fuTou": "甲午",
  "jieQi": "立春",
  "ju": 8,
  "siZhu": {
    "year": "甲辰",
    "month": "丙寅",
    "day": "戊戌",
    "hour": "辛酉"
  },
  "yuan": "上元"
}

Sources and further checks

Dunjia Yanyi: historical rules for yuan and ju

Maintained by the Fateverse project content team. This page explains the current calculation rules and traditional sources; it has not received an independently named professional review. Updated 27 October 2026. Compare the linked calculation records before relying on a boundary case.

Sources and further checks

Dunjia Yanyi: historical rules for yuan and ju