The Han nationality is more complicated in structure. The origin, formation, and development of the entire history have always been dynamic, that is, the structure is constantly changing due to contacts and cases between ethnic groups. Exist in Chinese territory, between the north and south (with the Tan Linh mountain range and the Hoai Ha line as the boundary), its historical background, ethnicity,... are completely different. The formation and development of the Han nationality in the two regions is largely affected by this difference. Investigating their origin, formation and development will see the characteristics of the Han nationality in the territory.