The positive detection of New Crown in imported Chelsea is a chance event, Chelsea can still be eaten safely, but need to take good disinfection measures. The incident of imported Cheerios testing positive for New Crown still occurs, because imported fruits and other special food need to carry out the whole process of cold chain preservation, transportation, and therefore to the New Crown Virus provides suitable conditions for the survival of the New Crown Virus, the New Crown Virus can survive for a longer period of time under low-temperature conditions, and therefore it is easier to appear nucleic acid test positive results. Therefore, buy imported cold-chained food as little as possible. If you need to buy food, go to regular supermarkets, which are generally relatively safe after sterilization and nucleic acid testing. It can also be sterilized in a sterilizer.