Han people came to the border areas in large numbers. Who entered the Yellow River Basin?

When are you talking about?

The main reason for the migration of Han people is that the original place of residence is caused by population expansion, war, disasters, unrest and other reasons. Inland migration is basically impossible at this time. During the Shang and Zhou dynasties, immigrants from conquered foreign countries were separated and moved to areas where the clan had strong influence. The Qin State migrated a large number of immigrants from various countries to serve as corvees. During the Han Dynasty, a large number of people migrated to densely populated areas to guard and cultivate the borders. There were also Xiongnu tribes living in the Hexi Corridor to the Walnut area. During the Three Kingdoms period, due to wars and a significant decrease in the Han population, Cao Cao once moved a large number of ethnic minorities to the Yellow River Basin and Shandong for reclamation.

The Five Hus and Sixteen Kingdoms period and the Southern and Northern Dynasties were periods of great integration of northern and southern ethnic groups. Nomadic peoples went south to the Yellow River Basin in large numbers, and Han people from the Central Plains crossed the river in large numbers to go south. National integration in the Sui and Tang Dynasties. Pushing the Han people to Central Asia, the northeast, and the southwest, during the Liao, Jin, Song, and Xia dynasties, there was another process of northern peoples moving southward.

In the Yuan, Ming and Qing dynasties, people from the Central Plains migrated mainly for survival. The over-exploitation of the Central Plains has severely damaged the ecology and cannot support a large population.

During the late Qing Dynasty and the Republic of China, population migration was still due to wars. It was well-known to go to the east of the Guandong and to the west. New China's border settlements and border reclamation are a militarized behavior.