The registration address of the city of dong chong is located in room 2, unit 2304, 1 long fucon road, room 229, dong chong city, guangdong province. The registration authority is the market supervision authority of dong chong city, represented by legal persons and includes general projects: sale of new membrane materials; sale of high-performance fibres and composite materials; development of new materials technology; extension services for new materials; import and export of goods; domestic trading agents; sale of daily chemical products; technological development of biochemical products; and sale of chemical products (excluding licensed chemical products). Licensing projects (in addition to legally approved projects, operating autonomously under a licence): operation of hazardous chemicals. (a project subject to legal approval may only be carried out with the approval of the relevant department, subject to the approval documents or licences of the relevant department)