Vegetables and fruits are rich in a variety of beneficial ingredients for human body, such as vitamin C, dietary fiber, pectin, etc. They are important sources of minerals and vitamins for human body. The Dietary Guidelines for Chinese Residents (2022) recommends that adults consume no less than 300g of vegetables every day, of which 1/2 should be fresh dark vegetables; Fruit 200-350g. How can we live in modern life without fruits and vegetables? However, it is often the case that less fruits and vegetables are bought and not enough to eat, while more fruits and vegetables are stocked and faced with the risk of corruption and deterioration. Even if there is no corruption and deterioration, long-lived fruits and vegetables will also suffer from nutritional discounts, such as less water, staleness, damage to antioxidant nutrients, mold breeding and other nutritional losses and food safety problems. So, how to preserve vegetables and fruits? The correct opening method is as follows: 1. The water on the surface of green leafy vegetables is dried and then stored in general supermarkets. In order to keep fresh, merchants may spray some water on the surface of green leafy vegetables. Note that in this case, the surface water should be dried in a cool, dry and ventilated place. Vegetables soaked in water are easy to freeze in the refrigerator, especially green leafy vegetables. The key to keeping leafy vegetables fresh is to lock water. Most leafy vegetables are cool vegetables, which are suitable for storage at 0-4 ° C, that is, the temperature of the refrigerator's fresh-keeping layer. Before putting it into the refrigerator, remove the rotten and yellow leaves, then wrap the root of the dish with kitchen paper, then wrap the dish with plastic wrap or plastic bag, and finally put it into the refrigerator. However, it should be noted that the vegetables should not be stored close to the inner wall of the refrigerator to avoid frostbite. 2. Rhizome vegetables such as sweet potato, potato, radish, lotus root and Chinese yam do not need to be put in the refrigerator generally. They only need to be put in a fresh-keeping bag or paper bag after drying the surface water, and then stored in a cool and dry place. They can also be wrapped with a layer of newspaper and stored in a dark place on the balcony. Do not expose them to direct sunlight, which may cause potatoes to turn green and sprout. 3. The condiments wrapped with kitchen paper can be put in the refrigerator to store coriander, onion, ginger, garlic and other condiments, which can be wrapped with kitchen paper as vegetables. If the water content is low, such as shallots, chopped garlic, and hot millet, you can cut them directly and freeze them. Take them when you use them. 4. Keep fresh mushrooms in a sealed bag with the umbrella handle facing up. The shelf life is relatively short. Use kitchen paper towels to absorb the excess water on the surface, and then put the whole unwashed mushrooms in a sealed bag (note that the umbrella handle faces up, or it may be crushed or collapsed). Close it and put it in the refrigerator for refrigeration. If the dried mushroom is dehydrated, it can be stored for 3-6 months in a cool, dry and ventilated place. 5. Whether the fruits are durable or not determines whether the fruits should be stored in the refrigerator according to the classification. Tropical fruits, such as mangoes and bananas, should not be stored in the refrigerator, otherwise they are prone to frostbite and can be stored at room temperature. Grapes, strawberries, blueberries and other fruits need to be refrigerated separately and eaten in 2-3 days as far as possible. Fruits that are relatively resistant to storage, such as apples, pears, oranges, oranges and other fruits, can be stored in a cool and ventilated place without refrigerator, but should not be stored for a long time. They are easy to air dry, volatilize water, and affect the taste. In addition, we should also teach you four precautions: 1. It is better to buy vegetables and fruits now and eat them now. Don't leave them for a long time to cause corruption. 2. Refrigerator