Han nationality is a multi-ethnic group, not only from the north, but also from southern Renye Fang. Needless to say, Baiyue, a primitive ethnic minority in the south, is that most of the Han ancestors in the Yangtze River valley migrated from the Central Plains. During the Eastern Jin and Southern Song Dynasties, a large number of northern giants in Jiangsu and Zhejiang became Han families. Since the Xia Dynasty, the Manchu Miao and Barbarians, and the northern Qiang, Rong and Di nationalities have been continuously integrated with the Chinese nation, and finally basically integrated with the Han nationality. After the Qin Dynasty, more than 400 ethnic groups, such as Xiongnu, Turkic, Rouran, Qidan, Jurchen, Xianbei and Mongolia, were mostly integrated into the Han nationality. Some Han people stayed in the north. During the Qin Dynasty, 500,000 troops stayed in Guangdong, Guangxi and other Lingnan areas. During the Eastern Jin Dynasty and the Southern Song Dynasty, a large number of northern Han giants moved southward on a large scale. During the Ming Dynasty, a large number of Han people moved south. It is also said that Hakkas moved south during the Qin and Han Dynasties. Therefore, the Han nationality in North and South is the product of national integration.