1. Any food should pay special attention to five elements: factory name, address, production date, shelf life and qs mark. Pay attention to whether the food packaging label is complete, and whether the food packaging is marked with product name, ingredient list, net content, factory name, address, telephone number, production date, shelf life and product standard number.

2. Pay attention to the production date or shelf life of food, and whether the food exceeds the shelf life.

3, look at the product label, pay attention to distinguish between certification marks.

4. Look at the color of food, don't be confused by too bright and beautiful food.

5. Look at the sanitary conditions of bulk food operators, and pay attention to whether there are health certificates, health certificates and other relevant certificates, and whether there are fly-proof and dust-proof facilities.