What were the laws of population migration in China during the Western Jin Dynasty?

The population in the north migrated from the Yellow River basin to the middle and lower reaches of the Yangtze River.

After the establishment of the Western Jin Dynasty, Sima Yan made all the children of the Sima family king, sharing taxes, and some of them even commanded the Central Army. Jin Huidi, the heir of Emperor Wu, is an idiot. The struggle for power and profit between the Empress Dowager and the Empress Dowager led to a scuffle among the eight emperors (Wang Runan Liang, Wei, Zhao, Changsha Wangwa, Hejian Wang, Yue and Chengdu) for the throne, which was 16 (AD 29 1-306). This gave ethnic minorities the opportunity to invade the Central Plains. In the fifth year of Yongjia (AD 365,438+065,438+0), the Xiongnu captured Luoyang, captured Emperor Huai, burned and killed soldiers, killed more than 30,000 nobles and gentry, crossed the Jin Dynasty to the south, and the Western Jin Dynasty perished, which is called "Yongjia Rebellion" in history. Under the double oppression of class and nationality, the people of the Central Plains crossed the Huaihe River to the south, resulting in the first large-scale population migration in the history of China. With the establishment of the Eastern Jin regime in the south, the population of the north migrated to the south on a larger scale. By the early years of Liu and Song Dynasties, the population had reached nearly 300,000, reaching more than 900,000, accounting for 1/6 of the total population in the south at that time. A large number of refugees poured into Bashu area, and a large number of Bashu indigenous people fled to Jing and Xiang areas. "There are more than 100,000 refugees in Jingzhou" has injected new vitality into the south, promoted the transformation of extensive agricultural production mode of "boiling water" in the south of the Yangtze River to intensive agricultural production mode, and improved grain output and land utilization rate.

The population migration in Yongjia period of Western Jin Dynasty was cruel exploitation and oppression of people of all ethnic groups by corrupt rulers, which displaced people in the Yellow River basin and forced them to migrate to Jianghuai basin on a large scale (mainly to Jiangsu, Anhui, Hubei, Sichuan and other places). Since the Qin and Han dynasties, the population distribution pattern of the north with a large population and the south with a small population began to change, and the population of the south increased rapidly, which promoted the rapid economic development of the south. This is a landmark event that the population distribution center of China has shifted to the Yangtze River basin.