Food and beverage service places should not choose contaminated food. Food and beverage service places should not choose ingredients or suppliers of contaminated food. Food safety is an important issue in the catering industry, and ensuring the freshness, hygiene and pollution-free of food is the key to protect consumers' health. Catering refers to industries and services that provide food and drinks for people's consumption, including various forms of dining places and business models, from traditional restaurants, cafes and bars to fast food restaurants, cafeterias and take-away services.