魏源
In order to fill up the depopulated regions of Sichuan, a massive resettlement program was initiated during the Qing Dynasty, starting around 1670 or 1671 and lasting more than two centuries. Millions of people from Hubei, Fujian, Jiangxi, Guangdong, Shaanxi and other provinces were resettled in Sichuan. Some of the early migrants were those who returned after fleeing Sichuan (including the ancestors of Chinese leader Deng Xiaoping), but some were also coerced. A large number of the migrants came from Huguang (now Hubei/Hunan), and the migration was therefore described by 19th century scholar Wei Yuan as "". By the 1720s, 70–80% of the population of Sichuan was reportedly non-native, and as much as 85% a century later.