How can a compass tell which one is a talent and which one is a ding?

Compass, also known as compass, is a feng shui detection tool and a commonly used operation tool for managing style. The compass is mainly composed of a magnetic needle in the center of a disk and a series of concentric circles, each of which represents the ancient people in China's understanding of a certain level of information in the cosmic system.

With the development of processing industry, the magnetic needle changes from spoon to needle, and from floating magnetic needle to thimble, which makes the measurement accuracy of compass change qualitatively. In the Tang Dynasty, Yang Junsong combined the Eight Diagrams and the Twelve Branches into one, and added all the heavenly stems A, B, C, D, E, Ji, Geng, Xin, Ren and Gui to the earthwork system to indicate the position except the two branches of E and Ji. Thus, 360 degrees around the horizon is divided into twenty-four equal parts, called twenty-four mountains, each of which accounts for fifteen degrees, and three mountains are a divination, each of which accounts for forty-five degrees. Since the founding of the Tang Dynasty, 24 mountains have been preserved. Therefore, the site of Twenty-four Mountains is one of the main levels in Pan Yang. In the north, there are three mountains: Renzi, Zi and Gui, which belong to the acquired Kangua and the acquired Kungua respectively. Three mountains in the northeast are ugly, ugly and awkward. The day after tomorrow, they belong to divination, which belongs to congenital divination.

The three mountains in the east, A, Mao and B, belong to the deviation between acquired divination and postnatal divination; The three mountains in the southeast are Chen, Xun and Si, the day after tomorrow belongs to Xun Gua, and the congenital belongs to Du Gua;

The three mountains in the south, C, noon and D, are separated from divination the day after tomorrow and are divination for the day after tomorrow; The three mountains in the southwest are not Kun and Shen, and the day after tomorrow belongs to Kun Gua, and the congenital belongs to Kun Gua; Xisanshan, Geng, You and Xin belong to acquired divination, and divination is congenital; The three mountains in the northwest, dry and sea, belong to the post-heavenly dry divination and congenital divination.