This is really a bit difficult for modern people. We are used to living with the refrigerator. How to preserve ingredients and food if there is no refrigerator for refrigeration or freezing?

Onion, potato, radish, Chinese cabbage, pumpkin, eggs, yam, carrots and other ingredients. Can be stored in a cool and ventilated place. It is best to have a shelf to polish the ground and put it in a plastic bag, but don't fasten the seal too tightly to keep the ingredients ventilated. Such ingredients generally do not rot when stored for five to eight days.

The ingredients of dried products can be stored at room temperature, moisture-proof and mildew-proof.

If food needs to be stored, this is recommended. Prepare a foam box, and then go to the supermarket to buy a few bottles of quick-frozen bottled water, the kind that is frozen into ice, and buy it back and put it in the foam box.

Put a few bottles of ice water at the bottom, wrap the food with plastic wrap, separate it with things, put an ice cube on it, and then cover the foam box with a heavy object to keep it at a certain temperature, so it can be kept for about 24 hours. If the mineral water is completely frozen, the effect will be weakened. Food should also be digested in a short time, especially overnight leftovers. It is not recommended to store it for too long before eating.