It is understood that the comprehensive bonded zone refers to the special supervision area of the customs with the function of bonded port established in inland areas. The comprehensive bonded zone is managed by the customs with reference to relevant regulations. It integrates the functions of bonded zone, export processing zone, bonded logistics zone and port, and can carry out international transit, distribution, procurement, entrepot trade and export processing, China has the most special and open policies with the most simplified procedures and functions. So far, there are 167 special customs supervision areas in China.

In November 2019, it applied to integrate and optimize Tianjin Port Free Trade Zone and Tianjin Port comprehensive free trade zone into a new Tianjin Port comprehensive free trade zone, and strive to build a new comprehensive free trade zone with industrial agglomeration, prominent characteristics and high-quality development.

It is reported that the integrated and optimized Tianjin Port comprehensive bonded zone will implement a high-level trade and investment liberalization and facilitation policy, based on objective reality, improve the development level and save management costs. At the same time, focusing on the four existing industrial clusters of international trade, processing and manufacturing, bonded logistics and exhibition and marketing, actively introduce new forms of service trade such as bonded R & D, design and maintenance, and build an imported automobile bonded storage and display trading center, commodity distribution and distribution center, cross-border e-commerce demonstration base and R & D, design, processing and manufacturing base, so as to enable the development of industries with science and technology, Promote the optimization and upgrading of industrial structure and contribute to the construction of a modern socialist metropolis in Tianjin.