If the shelf life is less than 1 year, the critical period is 20 days before expiration (such as instant noodles, milk in aseptic packaging, etc. ).
If the shelf life is marked as less than 90 days to half a year, the critical period is 15 days before expiration (such as some vacuum-packed refrigerated cooked food and instant rice, etc.).
If the shelf life is marked as 30 days to less than 90 days, the critical period is 10 days before expiration (for example, some sterilized meat products, fresh eggs, etc. ).
If the shelf life is marked as 16 days to less than 30 days, the critical period is 5 days before expiration (such as yogurt and some snacks).
If the shelf life is marked as 15 days or less, the critical period is 65438+ 0-4 days before expiration (such as milk, live bacteria milk beverage, staple food, unsterilized cooked food, unsterilized boxed bean products, etc. ).