1 Preservation method of raw zongzi is suitable for the growth and reproduction of various microorganisms, pathogenic bacteria and molds due to the hot weather, high temperature and high humidity in summer. Zongzi contains water and consists of glutinous rice, meat (or red bean paste) and other raw materials, and it is easy to deteriorate after being stored at room temperature for more than 2 hours. Don't buy or eat zongzi stored at room temperature and sold without refrigeration facilities. It is best to put them in the frozen layer of the refrigerator if they need to be stored for a long time. Zongzi can only be preserved after being cooked. Don't put it in the fresh-keeping layer after cooking, it will go bad easily there, and it won't go bad if it is put in the frozen layer for ten and a half months (the temperature of the refrigerator is best at five to three degrees Celsius).

2 Preservation method of fresh zongzi Fresh zongzi should be placed in a cool, ventilated and dry place with an open bag, and refrigerated in the refrigerator within 12 hours. It can be kept fresh for about 3 days at the low temperature of 0℃-4℃, and stored in the freezer at-18℃ for a longer time. Never put fresh zongzi in a sealed, stuffy car trunk and transport it home, otherwise it is very prone to mildew. Note: Fresh zongzi is most afraid of mugginess. If it is exposed to high temperature, it is easy to go moldy and deteriorate, so it must be heated and eaten as soon as possible after buying it back.

3 storage methods of quick-frozen zongzi have high requirements for storage and distribution. When purchasing, you must pay attention to buying quick-frozen zongzi placed in the supermarket freezer, and go home as soon as possible and put it in the freezer of the refrigerator immediately to ensure that it is stored below-18℃. Note: Quick-frozen zongzi must be eaten after being fully heated. It is best to boil zongzi in boiling water for13-15 minutes before eating.

4 Preservation method of vacuum zongzi It is better to keep vacuum zongzi in a cool and dry place, and pay special attention not to let the sun shine directly. Zongzi is usually stored at 8-15 C. Zongzi packed in vacuum can be stored for three months, while Zongzi without vacuum packaging can only be stored for 3-5 days. When the temperature is lower than 8 C, the structure of glutinous rice will change, the texture will become cut and rotten, and the taste will become moldy. Therefore, everyone should blindly buy too many zongzi at a time. Note: Due to the long shelf life of vacuum dumplings, check whether there is air leakage and swelling before eating. If there is air leakage or swelling before eating, never eat it.