2. Fungi such as auricularia auricula, shiitake mushroom and tremella, seafood such as kelp and laver, vegetables such as dried bamboo shoots and dried bean curd all have a common feature: the protein content is low, so long as the water content is low enough, it will not cause a large number of bacteria to multiply; The fat content is also low, and unpleasant smells such as spicy taste will not appear because of the oxidative rancidity of oil.

3. This kind of dry goods will be slowly oxidized by vitamins and other nutrients during storage, so it needs to be stored in sealed bags or cans. Oxygen-free environment can delay oxidation reaction and help prevent moisture absorption and deterioration. Auricularia auricula, laver and dried bean curd can be stored in a cool, ventilated and dry environment, and the shelf life can reach two years without being put into the refrigerator.