The main difference between the electronic seal and the traditional seal is that the electronic seal contains an encrypted chip, which has anti-counterfeiting function. Electronic reading reduces manual checking time and errors. The active electronic seal further adopts real-time positioning monitoring technology, so that the transportation route of the container can be tracked at any time. Electronic seals are used to supervise the movement of unreleased high-risk containers in the domestic tax area. The supervision includes the movement of import containers from the port area to the warehouse, the movement of re-export containers between two different controlled ports, and the movement of export containers from the warehouse to the port. It has become the best tool to replace manual escort, improve supervision safety, and save customs manpower.