1 Politically, vassal states are increasingly annexed by big countries, ethnic integration has become the mainstream of ethnic relations, and unification is the inevitable trend of social development. (Small countries and weak countries are mostly merged by big countries, and there are also changes among big countries: the three ethnic groups are divided into Jin and the fields are qi. )

Economically, the slave economy is disintegrating day by day, the feudal economy is developing, and the emerging landlord class is rising. It is an inevitable trend for feudalism to replace slavery.

3 Culturally: With the increasingly unified society, ideological unity is also an inevitable trend of historical development.