What is the best Feng Shui compass in China?

It is hard to say what is the best geomantic compass in China, because there are many geomantic schools in China, and there are some differences in geomantic compasses used by different geomantic schools. As a necessary feng shui compass for feng shui masters, feng shui compass can be said to be a very important object to seek wind and go to holes. The best feng shui compasses in China are almost the same. The quality of the main compasses is fine and acceptable. Among the produced geomantic compasses, we can consider Chongdaotang Compass, Shanlongtou Compass, Wan 'antang Compass, Subtraction Geomantic Compass, Yongqingtang Compass, Yuchitang Compass, Hu Compass, Jiang Dahong Compass, Compass, Lai Buyi Compass, Automatic Compass, Set One Compass and Dongyu Compass. Of course, in addition to these China geomantic compasses, there are also three-way tables, three-way tables, three-way tables, comprehensive tables, mysterious flying star tables, eight-way tables, golden lock jade plates and so on. Now with the development of science and technology, the compass has gradually entered the electronic age from the primitive state. Nowadays, many electronic compasses can choose to sense the change of magnetic field around the space and save it, and then automatically repair the error of measurement degree through the mathematical calculation mode of calculus. That's all I know about the geomantic compass, and there are many ways to use it. I'm not sure about it, so I won't tell you. You can buy a book as a reference.