Siwen tofu is a traditional famous dish of Han nationality in Yangzhou, Jiangsu Province, with a long history, belonging to Huaiyang cuisine and Jiangsu cuisine. The material selection is very strict, the knife work is fine, soft and mellow, and it melts at the entrance. At the same time, it has the effects of regulating malnutrition, tonifying deficiency and strengthening the body, and is a good prescription 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 who have done it until now are called Sven Tofu. " Diaodingji is also called "Assorted Tofu Soup".