No. According to the food website, prefabricated dishes are processed and packaged in the production process, preserved by freezing or refrigeration, and finally heated in the restaurant for guests to use. Beihai Hai Jie Restaurant is a catering enterprise, providing on-site cooking service. The dishes are made on the spot according to the needs and tastes of the guests, without pretreatment and packaging. So Beihai Hai Jie Restaurant is not a prepared dish.