1. The Core Three Plates (三針三盤)
The foundation of every San He Luopan consists of three concentric rings of the 24 Mountains, each offset by 7.5 degrees for specific purposes.
| Ring Name (CN) | English Name | Needle (針) | Function & Primary Use |
|---|---|---|---|
| 地盤正針 | Earth Plate | Original Needle | Standard Alignment: Used for determining the sitting and facing (Li Xiang 立向) of buildings and tombs. Reflects the magnetic North. |
| 人盤中針 | Man Plate | Middle Needle | Ba Sha (拔砂): Offset 7.5° counter-clockwise. Used to assess the influence of surrounding landforms (mountains, buildings) and neutralize Sha Qi. |
| 天盤縫針 | Heaven Plate | Seam Needle | Na Shui (納水): Offset 7.5° clockwise. Used to assess the entry and exit of water flows (rivers, roads) relative to the property. |


