Mainly due to the first legal requirement, and secondly, in order to trace the source, in actual operation, the regulatory authorities also require operators to keep it according to law. The supplier's business license and food business license or production license, purchase records, purchase bills and purchase ledgers are required.
The regulatory authorities will conduct random food inspections from time to time. If the food quality in your food sampling inspection is unqualified according to the regulations, and the food business operator has fulfilled the purchase record system, and there is sufficient evidence to prove that he does not know that the purchased food does not meet the food safety standards, and can truthfully explain the source of the purchase, he may be exempted from punishment, but the food that does not meet the food safety standards shall be confiscated according to law, causing personal, property or other damage, and he shall be liable for compensation according to law. In other words, things can be exempted from punishment unless they have caused harm. The regulatory authorities can trace back to the upstream according to your evidence and find out whose pot it is. This can be used as a backup to find the first responsible person.