Beijing's intangible cultural heritage, which has been inherited for more than 600 years, is the oldest catering brand in Beijing and the representative of Beijing halal banquet. At present, there are more than 150 kinds of dishes, which are called "Manchu-Chinese banquet in pure food". The kitchen is famous for its rich variety, excellent workmanship, fast serving and profound cultural connotation. The cookhouse squad's recipes are not recorded in writing, and they are all passed down by word of mouth. Except for the descendants of the cookhouse squad, the specific method is unknown to outsiders.