2. Turn the inner disk, point the pointer to the north and set it to zero.
3. Tianxin points to the direction of measurement at ten o'clock, and which side is that position. For example, if the reticle points to the north, it is a non-party, a sub-party or a sunflower party. In addition, the directions in the compass are relative. Only when you determine the direction of a subject can you determine the other direction, otherwise it will be chaotic. My friend, I hope you will board the Yi-ology Hall as soon as possible.