Are old Shanghainese immigrants?

Yes Shanghai is a typical immigrant city. More than 85% of the population comes from all over the country, including Jiangsu, Zhejiang, Guangdong, Anhui, Shandong, Hubei, Fujian, Henan, Jiangxi and other provinces, so the old Shanghainese are immigrants. Shanghai, referred to as "Shanghai" or "Shen" for short, is the largest economic center and an important international financial center city in China, and the first batch of coastal open cities.