The structure of the compass can be roughly divided into: celestial disk, territorial disk, human disk, innate gossip, acquired gossip, twenty-four mountain directions, sixty-four hexagrams and Tianchi. The scientific name Tianchi is actually a compass. The basic use condition of the compass is to distinguish Dongmu Nanhuo from Jinmen Beishui according to the guiding characteristics of the magnetic needle, which can be divided into four categories: dry branch divination, exchange divination, separation divination, shock divination, Kun divination, Kangua divination, Gen divination and Kun divination, and the directions of the 24 mountains are in turn: Kangong Renzigui, Gong Li Wu Bingding, Gong Zhenjia Maoyi, Dui Geng Gongyou Xin and Gen Gong Ugly Gen.
Inner disk (the data core of the compass is here). It's the turntable next to the compass. Many concentric circles are printed on the inner disk, and one circle is called a layer. Each floor is divided into different equal parts. Some floors have more squares, while others have fewer squares. The least floor is divided into eight squares, and the most floor has 384 squares. Different characters are printed on each grid. There are many kinds of compasses, some with many layers, some with few layers, the most with 52 layers, the least with 5 layers and some with 28 layers. The contents of the compass are printed on different circles (layers) of the inner disk, which is the main component of the compass. All feng shui schools put the main content on the compass, and many functions of the compass have become indispensable tools for many Yi-ology workers and enthusiasts.
Outer disk (compass positioning and compass tray). A circular compass has no outer disk. Generally speaking, a ternary disk must have an outer disk for orientation. The outer disk is square, which is the tray of the inner disk. There is a small hole at the midpoint of the outer side of the four sides, and the red line penetrates into the ten meridians of Tianxin, which is used to read the contents of the inner disk. The ten directions of Tianxin are required to be perpendicular to each other, and the new compass you just bought must be calibrated before use. There is a chance to combine the outer disk with the inner disk. It's best to turn flexibly but not too slippery.