What are the most influential ethnic integrations in the history of China? Thank you! !

Four great national amalgamations in the history of China.

first time

During the Spring and Autumn Period and the Warring States Period, it was carried out in the hinterland of China, forming the main body of the Chinese nation-the Han nationality.

second time

During the Wei, Jin, Southern and Northern Dynasties, there was convection in ethnic migration, some Han people went to the periphery and the surrounding ethnic minorities came to the mainland.

the third time

During the Song, Liao, Jin and Yuan Dynasties, it was carried out in the border areas, where not only ethnic minorities and Han people lived together, but also a large number of Han people lived together with ethnic minorities.

the fourth time

The Ming and Qing Dynasties laid the foundation of the present territory of China and the Chinese nation with the Han nationality as the main body.

(* Many places rank the integration of the fourth ethnic group as the third. )