How to determine the direction of burial tomb with compass

First, determine the direction. The compass area in the middle of the compass is called Tianchi. In Tianchi, one end of the pointer points south and the other end points north. Generally speaking, one end of the arrow points to the south.

Then put the compass horizontally in front of the chest and abdomen, so that it is convenient to look vertically, so that the crosshair of the compass coincides with the front, rear, left and right directions of the residential door. Then slowly rotate the inner disk with both thumbs, that is, the copper disk area engraved with various characters in the above picture, which is a whole and can be rotated. When the inner disk rotates, Tianchi rotates and the pointer rotates, but the change of the pointer is not so great, because no matter how it rotates, the pointer eventually points to the north and south. Rotate the inner disk until the magnetic needle stops and coincides with the red line representing the north-south direction in Tianchi, that is, the center of "noon" in the twenty-four mountains coincides with one end of the pointer pointer pointer; The center of "Zi" in the Twenty-four Mountains overlaps with the northern end of the pointer. At this time, the direction is in front of the reticle, and the mountain is behind it.