food ingredients, storage methods, purchase certificates and employee records.

1. Food composition: It is necessary to record the raw materials used in each food and their sources to ensure the quality and safety of the food.

2. storage method: it is necessary to record the storage time and temperature of food samples to ensure that the food will not deteriorate and be polluted during storage.

3. proof of purchase: it is necessary to save invoices or other supporting documents for purchasing raw materials so as to correspond to the food ingredient records.

4. Employee records: The names, positions and operation records of employees involved in food production need to be recorded, so as to trace the responsibilities.