There is no Cai Xiansen's diversified catering structure, which is based on cooking rice and beef offal pots with sauce, supplemented by mixed powder, soup powder, snacks and drinks. Mr. Cai doesn't cook sauce-flavored rice in Changsha, because Changsha people don't like the taste of sauce-flavored rice, so there is no sauce-flavored rice cooked by Mr. Cai in Changsha. Changsha, also known as Xingcheng, is a prefecture-level city, provincial capital and megacity under the jurisdiction of Hunan Province, and is an important central city in the middle reaches of the Yangtze River approved by the State Council.