Immigrate to the northwest

In history, the "Yongjia Rebellion" of China's population migration occurred in the Yongjia period of the Western Jin Dynasty. The corrupt rulers brutally exploited and oppressed the people of all ethnic groups, thus displacing the people in the Yellow River basin and forcing them to migrate to the Jianghuai basin on a large scale (mainly into Jiangsu, Anhui, Hubei, Sichuan and other places).

The population moving south is about 900,000, which has changed the pattern of large population in the north and small population in the south since Qin and Han Dynasties. The population in the south has increased rapidly, which has promoted the rapid economic development in the south. This is a landmark event that the population distribution center of China has shifted to the Yangtze River basin. The "Anshi Rebellion" occurred in the Tang Dynasty, and about 6,543,800 people moved south, which fundamentally changed the pattern of population distribution in China concentrated in the Yellow River basin, and the proportion of population distribution between the north and the south of China reached a balance for the first time.

The "Jingkang Rebellion" occurred in the Northern Song Dynasty. 1 125, Jin destroyed Liao and began to attack the northern song dynasty in the south. The Yellow River basin has become the main battlefield. Every major war caused a large number of residents in the Yellow River basin to migrate to the Yangtze River basin, mainly to Zhejiang, Jiangsu, Hubei and Sichuan, which was the largest stage of population migration in the late Northern Song Dynasty. During the Yan Liang period in Jin Yan, 1 16 1 Jin tore up the contract with the Song Dynasty and invaded the south on a large scale. The Huaihe River basin became the main battlefield, forcing the residents of the Huaihe River basin to move south to the Yangtze River basin, mainly to Zhejiang, Jiangsu, Hunan and Jiangxi.

During the period of "Mongolian soldiers invading south", Kublai Khan and others arrived in the khanate. 1273, a large number of Mongolian soldiers invaded south and launched a war to destroy the Southern Song Dynasty. The main battlefield is in the middle and lower reaches of the Yangtze River, and a large number of local residents have moved to the Pearl River basin to escape the war, mainly in Guangdong, Guangxi and Fujian.

/kloc-After imperialism invaded old China in the late 9th century, China, Russia and Japan competed to expand their power in the northeast, build railways and plunder resources, which required a lot of labor, forcing North China to go bankrupt, and farmers moved to the northeast, especially in Shandong and Hebei provinces, which reached 3,000 during the period of +0923- 1930. In addition, there are many farmers in Gansu, Qinghai and Xinjiang in the northwest, such as Henan and Shaanxi provinces. 7. After the invasion of Southeast Asia by European and American capitalism in the period of "Southeast Coast Going South to Southeast Asia", in order to plunder the resources of Southeast Asia, bankrupt farmers were recruited from China as the labor resources for developing colonies, and the labor force from China was sold, which led to a sharp increase in the population of Southeast Asia.

However, the blind and disorderly flow of migrant workers has also brought some social problems. The most prominent is the rising crime rate of urban migrant workers. For example, in 1993, there were * * * 16 10000 criminal cases nationwide, involving more than 50% of the floating population and more than 80% in Guangdong, posing a great threat to social security and the safety of local residents.

Other social problems include: violation of family planning, rapid increase of urban population, housing shortage and traffic congestion, which increase the pressure of urban employment and destroy the environment.