Tell me more about how to use the compass.

The scientific name of the compass is Luo Jing. It was created in the time of Emperor Xuanyuan. Later, the sages of the past dynasties used the principles of the Book of Changes and Heluo to observe the mountains and rivers on the earth based on the principles of the sun, moon, five stars, seven political affairs and the movement of celestial phenomena. Rivers and plains are made by modifying and improving the undulating shape of the waves. They are used to determine the direction and survey the terrain. Most of them are called "Compass" or "Luogeng" by Kanyu geographers and sailors, and rarely called "Compass". When it comes to how to use a compass, if it were discussed in detail, I believe it would take a lot of space. Because it includes so many things, this article will only talk about simple usage methods. There are many types of compasses. The commonly used compasses include three-yuan compass, three-in-one compass, three-yuan compass and three-in-one compass, Yi compass, Xuankong compass and the unique compasses of users of various sects. But no matter which sect's compass it is, there must be a layer in the middle with the directions of the twenty-four mountains. Starting from the north, they are Renzigui, Chougenyin, Jiamaoyi, Chenxunsi, Bingwuding, Wei Kunshen, Gengyouxin, Xuqianhai and so on. ***Twenty-four directions. If you have a compass, you can find that the degrees relative to the compass and the pointer are as follows: Direction Hexagram Mount Twenty-Four Angle North Kan Ren Zi Gui 337.5 - 352.5 352.5 - 7.5 7.5 - 22.5 Northeast Gen Chou Gen Yin 22.5 - 37.5 37.5 - 52.5 52.5 - 67.5 Zhengdong Zhenjiamaoyi 67.5 - 82.5 82.5 - 97.5 97.5 - 112.5 Southeast Xunchen Xunsi 112.5 - 127.5 127.5 - 142.5 142.5 - 157.5 Zhengnan Li Bingwuding 157.5 - 1 72.5 172.5 - 187.5 187.5 - 202.5 Southwest Kunwei Kunshen 202.5 - 217.5 217.5 - 232.5 232.5 - 247.5 Zhengxi Dui Geng Youxin 247.5 - 262.5 262.5 - 277.5 277.5 - 292.5 Northwest Qianxu Qianhai 292.5 - 307.5 307.5 - 322.5 322.5 - 337.5 After knowing the direction of Mount Twenty-Four, Now let's look at the shape of the compass. You can see from the shape of the compass that in the center of the compass is a circular Tianchi (i.e., a compass for orientation). On the outside is a movable turntable with gold characters on a black background and a copper surface, which is called the inner disk or disc. The plate is filled with words in circles. It is customary to call a circle a layer. There is one layer with twenty-four directions, and the outermost is a square plate, called the outer plate or square plate. The disc body is made of rosewood, which is the most durable, but is heavier than ordinary wooden discs. The outer plate has four small holes, and two fish wires or glue threads are passed through the small holes in the middle of the four sides in a cross shape. It is used to determine the sitting direction. The main compass used is the central magnetic needle. The inner disk outside Tianchi is made of steel. The background color of Tianchi is usually white. There is a red straight line drawn at the bottom. There are two red dots on one end to the left and right of the red line. The red line is oriented north and south. , the side with the red dot is Zifang (due north), and the other end is Wufang (due south). There is a very sensitive magnetic needle on it. There is a small hole at one end of the magnetic needle. When using the compass, hold the outer disk with both hands on the left and right, with your feet slightly apart. Place the compass between the chest and abdomen. Keep the compass horizontal. Do not raise the left side higher than the right lower, or the front higher than the back lower. Then use your back as your seat, face your face as your orientation, and start standing. At this time, the cross lines on the compass should coincide with the four correct positions of the house: front, back, left, and right. If the cross lines are not erected in the correct direction, then the measured sitting direction will be deviated. Yes. After fixing the position of the cross fish wire, use the thumbs of both hands to move the inner disk. When the inner disk rotates, the Tianchi will rotate accordingly. Keep rotating the inner disk until the magnetic needle stops and overlaps with the red line in Tianchi. One thing is very important, that is, the end of the magnetic needle with the small hole must coincide with the two small red dots on the red line, and the positions cannot be offset from each other.

At this time, it shows that the fish silk line in the sitting direction (the horizontal one) intersects with each layer of the inner disk. The various data and information we are looking for are displayed on the area traversed and covered by this fish line. However, there are more than ten or twenty levels on the compass. Which level should you sit on? It's the level of Mount Twenty-Four. It is near Tianchi. We use the "mountain" on the direction of the fishing line to indicate direction, and the "mountain" on the side of the fishing line to sit on, we use it to indicate sitting. For example, facing the mountain is Zi, and sitting on the mountain is Wu, so we call it sitting at Wu and Xiangzi. Once you know where you are sitting in your house and put the compass at the center of the house, you can find the direction (or palace position) of the house from the direction you are sitting.