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In page Shanghai cuisine:

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In the later part of the 19th century, after Shanghai became a major domestic and international trading port, Benbang dishes underwent substantial change. After the opening of Shanghai port in 1843, sixteen different catering schools opened in Shanghai.[citation needed] Anhui cuisine was the first to gain popularity in Shanghai, followed by Suxi cuisine, Cantonese cuisine, Huaiyang cuisine, and Beijing cuisine. In the 1930s, Suxi cuisine was prevalent in almost half of Shanghai's restaurants. Guangdong cuisine was highly popular among both residents of Shanghai and foreigners. As a result of adopting influences from other cuisines, the flavors of Shanghai cuisine became more complex.[1]