There have been several great immigrants in the history of China.

1, after the reunification of Qin, the Yue people were conquered in the south and the Huns were attacked in the north. Qin Shihuang moved to the Central Plains to live.

2. At the end of the Western Jin Dynasty, the "Yongjia Rebellion", also known as "Five Wild Flowers", five ethnic groups, namely Xiongnu, Xianbei, Anta, Xi and Qiang, moved into the Central Plains from the north and northwest.

3. After the "An Shi Rebellion" in the middle Tang Dynasty, a large number of Central Plains people moved to the south of the Yangtze River.

4. After the "Jingkang Change" at the end of the Northern Song Dynasty, a large number of Central Plains people moved to the south of the Yangtze River.