Where did the former Shanghainese come from? Jiangsu?

The composition of Jiangsu and Zhejiang provinces.

After the Opium War, immigrants from China and other parts of the world poured into Shanghai (foreign concessions and the small town of Shanghai in China). The old immigrants before 1949 mainly came from Jiangsu and Zhejiang provinces. At that time, Shanghai's urban dialect was only three-quarters of today's suburban dialect.

1956, the number of administrative districts in Shanghai decreased to 15 and then to 18. 1958, in order to meet the needs of urban development, the suburbs of Shanghai, Jiangsu Province were included in Shanghai, which also proved that the former Shanghainese also had Jiangsu people.

Extended data:

The origin of ancient Shanghainese;

During the Eastern Jin Dynasty in the 4th and 5th centuries BC, residents in Songjiang (also known as Suzhou Creek) and coastal areas mostly made a living by fishing, and created a bamboo fishing tool called Hu, and because the river was called blasphemy at that time, the lower reaches of Songjiang were called Hu, and Hu was called Shanghai for short.

Shanghai in Qin Dynasty spanned most areas of Lou County, Youquan County and Haiyan County in Huiji County. All three counties are in Shanghai today, and Huiji County is in Wuxian County and Suzhou today.

Baidu encyclopedia-Shanghainese

Baidu Encyclopedia-Shanghai