Why did the ancient population migrate so much?

The significance and influence of ancient population migration in China:

(1) It has promoted the great integration of the Chinese nation, facilitated national reunification and promoted the development of a unified multi-ethnic country.

(2) It is conducive to the economic and cultural exchanges between people of all ethnic groups in China and promotes the economic progress and development of all ethnic groups.

(3) It is beneficial to the development of the south of the Yangtze River, and promotes the economic center of ancient China to move southward.

(4) Develop South Asia and contribute to the development of world civilization.

(5) The population distribution is becoming more and more reasonable, and the population resources are being developed and utilized.

(6) It also promoted the cultural exchange between China and foreign countries and the economic and cultural development of Nanyang.

Qin dynasty and western Han dynasty

Qin dynasty was an imperial dynasty with great energy. After it unified China, it organized a series of large-scale population migration for political and economic needs, some of which were pioneering in the history of population migration in China and had a great influence on the immigration policies of later dynasties. In addition to political exile, its content is mainly divided into two categories.

the first category is "the real Guanzhong". For example, in the 26th year of the First Emperor (221 BC), "the world's richest man moved to 12, households in Xianyang" in order to strengthen the rule and develop into a veritable national political center.

the second category is border defense and development of new areas, among which the most famous ones are Wuyuan in the north, Yunzhong and Wuling in the south, with hundreds of thousands of people, which have played an important role in the development along the Great Wall and South China.

"Han inherited the Qin system", and continued to pursue the policy of "keeping the customs in place" and keeping the border guarded by immigrants, especially for the large-scale settlement immigrants in Hetao area, Hexi Corridor, eastern Qinghai and central Xinjiang, which is of great political significance.