The registration address of zhang jia hak is in room 1210 of the zhang jia hak tax zone, in the petrochemical trading building, with the registration authority being the market supervision authority of zhang jia hak, jiangsu province, with the legal personality representing xu wei and covering the wholesale distribution of hazardous chemicals (limited to the operation of the projects listed in the licence); the purchase and sale of chemical materials and products (other than hazardous chemicals) and import and export operations of self-employed and factoring goods (other than goods for which the state limits companies ' operations or bans imports and exports). (projects subject to legal approval may not operate without the approval of the relevant department)