How about the construction of the third line in Huguang Town, Sichuan?

Third-line construction refers to a large-scale national defense, science and technology, industry and transportation infrastructure construction in central and western China 13 provinces since 1964. The background of its beginning is the hostile relationship between China and the Soviet Union and the American offensive on the southeast coast of China. Third-line construction is another large-scale industrial migration process in China's economic history, and its scale can be compared with the inward migration of coastal industries during the Anti-Japanese War. Because the construction site is too remote, this construction method has caused serious waste and inconvenience to the later commercial development, but the third-line construction has also become an important booster for industrialization in the central and western regions of China.

Anhui and Jiangxi, which are the most economically developed and in the first line of national defense (referring to the southeast coast and northeast, Xinjiang and other regions) and the second and third lines of construction.

Relatively speaking, the scope of the third-line construction includes Sichuan (including present-day Chongqing), Hebei, Shanxi, Henan, Hubei, Hunan, Guangxi, Yunnan, Guizhou, Shaanxi, Qinghai, Gansu, Ningxia and other 13 provinces and regions, all located in the central and western regions of China. Among them, the seven provinces located in the northwest and southwest are also called the big third line, while the six central provinces are relatively called the small third line. Among them, Guizhou, Sichuan Dongshan District and Central Sichuan Plain have the largest number, the largest enterprise scale and the largest population, especially with Chongqing as the center. Among them, Chengdu, Sichuan mainly receives light industry and electronics industry, Mianyang mainly receives nuclear industry and aircraft industry, and Chongqing receives most weapons manufacturing and PLA equipment production except aerospace industry, even including nuclear test equipment (8 16 factory) and submarine manufacturing (Wangjiang Shipyard); Guiyang, Guizhou mainly accepts the photoelectric industry, and Anshun mainly accepts the aircraft industry.

Huguang's filling in Sichuan refers to a large-scale migration in the Qing Dynasty. According to research, residents of more than a dozen provinces such as Jiangxi, Fujian and Guangxi are also among the immigrants. At the end of Yuan Dynasty, Ming Dynasty and Qing Dynasty, Sichuan experienced wars and its population dropped sharply. Therefore, a series of measures have been taken from the central government to the local governments to attract immigrants, among which Huguangxing Province has the largest population. Taking Chengdu as an example, the Overview of Chengdu in the late Qing Dynasty recorded that "Chengdu people today are all from other provinces"; Among them, Huguang accounts for 25%, Henan Shandong 5%, Shaanxi 10%, Yunnan Guizhou 15%, Jiangxi 15%, Anhui 5%, Jiangsu and Zhejiang 10%, Guangdong Guangxi 10%, and Fujian.