Step 1: Pre-Chart Preparation (起盘前准备)
Fundamental Principle: "No Matter, No Chart" (无事不起局)
A Qimen Dunjia chart must only be cast when there is a specific matter to predict. Random casting should be avoided.
Four Pillars Determination (四柱确定)
- Query the Gan-Zhi combination for Year, Month, Day, Hour
- Determine solar term to judge Yang Dun or Yin Dun
- Calculate bureau number (based on solar term and time)
- Use perpetual calendar or specialized software
Yin-Yang Dun Judgment (阴阳遁判断)
| Period | Type | Solar Terms |
|---|---|---|
| Winter Solstice → Summer Solstice | Yang Dun (阳遁) | 冬至 → 雨水 → 谷雨 → 夏至 |
| Summer Solstice → Winter Solstice | Yin Dun (阴遁) | 夏至 → 白露 → 霜降 → 冬至 |