During the Warring States period, people detected astronomical phenomena in order to

Divination uses astrology to measure the fate of all countries in China. The ancients divided the astronomical phenomena into four directions, southeast, northwest and 28 nights, representing world events respectively. What "guest star in Jingxiang" means something will happen to Jingxiang. The ancients thought that all the major events of the vassal States could be seen from the astronomical phenomena, so they divided the stars into 28 stars. For example, the West Palace and Seven Nights are located in the territory of Qin State, and the fate of Qin State depends on Taibai Venus. At the same time, we should check the wolves, foxes and stars staying at home. Wu Chu is located in the south, so its main omen is the seven-night stay in Nangong and so on.