Two basic facts of China's ancient social structure. First, the existence of the patriarchal clan system linked by consanguinity constituted the horizontal network form with the family as the unit in ancient China society. Maintaining patriarchal clan relations has become an important way to stabilize interpersonal relationships and consolidate social hierarchical order. Second, the natural economy as the foundation of social existence is highly dispersed, and the absolute monarchy as the state power is highly concentrated. In order to make the dispersed natural economy exist and consolidate, we must strengthen political high concentration; Conversely, in order to maintain a highly centralized monarchy, it is necessary to strengthen the control and regulation of the decentralized natural economy.
The existence of these two most basic facts in ancient China society influenced each other, forming a "isomorphism of home and country". Patriarchal clan system, the so-called "patriarchal clan system", not only stabilized the social structure of one family, but also maintained the monarch's "family world", that is, the communication between "monarchy", "patriarchal clan system" and "monarchy", "home" and "country", forming the patriarchal clan system that lasted for thousands of years in ancient China.