Shanghai's population changes, the place with the largest foreign population, and the census.

After the opening of Shanghai, the number of immigrants far exceeded that of locals living here. They come from all over China, but over 80% of them are from Jiangsu and Zhejiang (especially from Ningbo), occupying an absolute advantage. Generally speaking, the economic and social status of immigrants in Wu dialect area is higher than that of immigrants in Jianghuai Mandarin area (Jiangbei people), and they have a strong sense of superiority traditionally, and the latter often feel discriminated against.

After the reform and opening up, the number of migrant workers in Shanghai has surged. Because of the convenient transportation, people from all provinces have it, among which Anhui is more famous.