Wu Chinese
Chinese varieties spoken at and south of the Yangtze delta
Wu is a major group of Chinese languages spoken primarily in Shanghai, Zhejiang province, and parts of Jiangsu province, especially south of the Yangtze River, which make up the Wu cultural region. The Wu languages are at times simply called Shanghainese, especially when introduced to foreigners. The Suzhounese variety was the prestige dialect of Wu as of the 19th century but had been replaced in status by Shanghainese by the turn of the 20th century, which coincided with a period of rapid language change in the city.
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