Before the Qin Dynasty, Chinese society adopted the system of enfeoffment, and the selection of scholars also relied on the hereditary system. During the Western Zhou Dynasty, the emperor and the princes divided the world. Under the Zhou Li, social classes were clearly defined. The management of the country is carried out by the emperor, princes, ministers, and scholars at different levels. And all classes are according to the law, according to the lineage of blood. In the Eastern Zhou Dynasty, the system began to collapse, so there were talents outside the system such as "keqing" and "dinner" to serve the monarchs of various countries.