According to legend, jiaozi was first invented by Zhang Zhongjing, a doctor in Nanyang, Henan Province in the Eastern Han Dynasty in China. In many provinces and cities in China, there is also the habit of eating jiaozi on the winter solstice.
Quick-frozen dumplings are a kind of food that can be eaten at any time by quick-freezing the wrapped jiaozi. Jiaozi is a traditional special food loved by the Han people in China, and it is a must-eat food for the Spring Festival every year.
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According to the instructions on the package, the average jiaozi can be stored for 3 months at-0/8℃. There are two meanings in this: as long as it is kept at MINUS 18℃ after leaving the factory, no obvious quality problems will occur within three months; If it is not kept at-18℃ all the time after leaving the factory, there is no guarantee that the quality will decline within 3 months.
This is because, under freezing conditions, microorganisms basically do not reproduce, but the taste and umami taste are slowly changing, fat is slowly oxidized, and vitamins are slowly decomposed. Therefore, a shelf life of 3 months at-0/8℃ does not mean that it can really be kept for 3 months.