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In page Shanghai cuisine:

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Shanghai cuisine is the youngest of the ten major cuisines of China, although it still has more than 400 years of history. Traditionally called Benbang cuisine, it originated in the Ming and Qing dynasties (c. 1368–1840). During the reign of Emperor Jiaqing and Emperor Guangxu of the Qing Dynasty, a food stall was set up in the old city of Shanghai called "Shovel Bang" (铲刀帮).[citation needed] After 1930, as Shanghai's industry and commerce rapidly developed, the main customers of Benbang cuisine were an emerging class of workers. As a result, the proportion of inexpensive dishes in Benbang cuisine began to decrease.