Zuan cuisine is a Hunan cuisine, which is designed by inheriting the exquisite food atmosphere of Ming and Qing Dynasties. Contains more than 200 dishes, fresh and fragrant, soft and rotten, fascinating, laying the foundation for the height of Hunan cuisine. Once it was launched, it was all the rage. On the streets of Nanjing, thousands of miles away from Hunan, Hunan restaurants were everywhere. With Tan Zuren in Beijing, he shared the title of "Double Tans in North and South".

Anzu shark's fin began in the Guangxu period of the Qing Dynasty, and was created by Cao, the chef of Guangxu Jinshi, and the governor of Hunan. After this dish was cooked, Tan Yan feasted and appreciated it even more. Later, the cooking method of this dish gradually spread to the society, and chefs in various restaurants followed suit and became a must-have dish at senior banquets.