Semi-finished pre-cooked dishes are made in the central kitchen, frozen or vacuum packed and preserved, and then sold to restaurants or consumers in the state of "semi-finished products". As long as they are simply cooked, they can become a finished dish. It is difficult for you to define whether it is a dish or an ingredient. In a sense, the appearance of prefabricated dishes is a sign that the boundaries between catering and food are becoming more and more blurred.