2. Siwen Tofu originated in Huai 'an and Yangzhou, Jiangsu. It is a famous traditional dish in Jiangsu province, belonging to Jiangsu cuisine-Huaiyang cuisine. This dish has a long history. The material selection is very strict, the knife work is delicate, soft and mellow, and it melts at the entrance. At the same time, it has the effects of regulating malnutrition, tonifying deficiency and strengthening body. It is also a good menu for the elderly and children. Yu Yue in Qing Dynasty wrote in Notes on Tea Fragrant Room: "The word' Si Wen Xi Fu' is poetic and good at making bean curd soup and sweet porridge. Those whose laws are effective are called Si Wen Tofu. " Diaodingji is also called "Assorted Tofu Soup".