The geomantic compass is two-way.

A compass is 360 degrees, divided into 24 mountains, and each mountain is 15 degrees, which requires higher accuracy. Then each mountain is divided into five squares with 15 degrees, and each square is 3 degrees. Zishanzishan is divided into five compartments: Renzi, Gengzi, Wuzi, Bingzi and Jiazi. The crosshair overlaps with the boxer, the boxer is between the boxers, and the boxers are 9 degrees in the center of Zi Shan, that is, the mountain is right and Zi Shan faces the noon. If the crosshair is inclined to the left or right and falls into Renzi or Jiazi for 3 degrees, it is all mountains, that is, it depends on Guishan on the left or Renshan on the right. Divination and divination can be used, but not. Although it was recorded in the Austrian language of the Qing dynasty, it was not complete, and later generations had an open formula.