Customs-supervised warehouses refer to the import, export, transit, transshipment, customs clearance goods that are subject to customs inspection within the scope of customs approval, as well as bonded goods and other inbound and outbound goods that have not yet completed customs procedures. In fact, it is also a type of bonded storage. Its function is similar to that of foreign bonded areas. It mainly stores goods and luggage items that enter the country and are not picked up by the owner in the future, or arrive without a certificate, documents are incomplete, procedures are incomplete, and Goods that violate customs regulations will not be released by the customs and need to be temporarily stored in a customs supervision warehouse to await customs processing.