In Yangshe Hutong in Houhai, Beijing, there is a "high-class" restaurant called Lijia Restaurant. In a small courtyard with no sign except the house number, a signboard of "Li Family Cuisine" was hung on the wall, and the inscription was written by Pu Jie, the younger brother of the last emperor Puyi. Former US President Bill Clinton and former British Prime Minister John Major have all visited here, and domestic celebrities such as Mei Baojiu, Jackie Chan and Jin Yong have also been guests of Li Jiacai. Private kitchens of descendants of Li Zijia, Minister of the Interior, during Tongzhi and Guangxu periods in Qing Dynasty. Li Zijia, the capital of the internal affairs of the Qing Dynasty, was deeply trusted by Cixi. Every day, the menu of the imperial kitchen is examined and approved by him, and he has tasted all the dishes eaten by Cixi and the emperor. Every time he reads a cookbook, he keeps it in mind, writes it down one by one when he gets home, and sorts out a set of cookbooks in his later years. Now the owner of "Li Family Cuisine" is Li, a retired professor in capital university of economics and business. The owner of this restaurant is Li. His business card is printed with traditional Chinese characters: "Li founder, consultant and professor of applied mathematics." The old man said that he didn't want others to think that he was "just a chef" because he wrote the identity of "professor". Li Jiacai also belongs to private cuisine. In this small courtyard, at first, only one table of food was cooked every day, only for a dozen people, and all diners were admitted to 200 yuan. Now there is another wing with two small tables, but it is enough for 20 people at most in one night.