"Li Yun Pian" said that the society before Yu was a society of great harmony. At that time, all property was public (the world was public), and leaders were elected according to it (selecting talents and abilities). When it comes to the rest of the society, it is pointed out that the state property has become private property (the world is home), private ownership is legal, it is a matter of course that the father dies and the son succeeds (it is a gift from adults), and there is a system of "the family is the world". Therefore, the family world is the product of historical development to a certain stage. The Western Zhou Dynasty further put forward the slogan "The world is the land of kings, the land of leaders, and the land of kings", and regarded all the land and subjects in the world as the private property of the royal family.