Cold chain refers to a special supply chain system in which perishable food is always in the low temperature environment necessary for products in all links of product processing, storage, transportation, distribution and retail after being purchased or fished from the origin, so as to ensure food quality and safety, reduce loss and prevent pollution.
According to the above definition, which of the followings is cold chains?
For fresh-keeping businesses, refrigerated trucks are used to transport fresh seafood to the refrigeration rooms of various shopping malls