Specific regions, specific enterprises or specific uses of specific duty-free imported goods shall be subject to customs supervision.
Customs is the national supervision and management of entry and exit: supervision and management of all means of transportation, goods and articles entering and leaving the customs territory. The scope of supervision and management is the entry and exit of the customs territory and activities related to it. Customs supervision and management is a national administrative law enforcement activities. The supervisory period of specific duty-free imported goods is: (1) ships, airplanes: 8 years; (2) motor vehicles: 6 years; (3) other goods: 5 years. Supervisory years are calculated from the date of release of imported goods.