The registration address of cheng din is located at the 413th floor of unit 1, unit 1, located on the south side street of the cheng dynasty of cheng dynasty, sichuan province. The registration authority is the market supervisory authority of cheng dynasty, represented by a legal person, and includes licensed projects: operation of hazardous chemicals. (a project subject to legal authorization and subject to the approval of the relevant department, which is subject to the approval of the relevant department) general projects: sales of plastics; sales of temperature-conserving materials; sale of equipment dedicated to environmental protection; sale of mechanical equipment; sale of construction materials; sale of technical services, technology development, technical advice, exchange of technology, transfer of technology and extension of technology; sale of chemical products (other than licensed chemical products); sale of specialized chemical products (other than hazardous chemicals); marketing of fertilizers; sale of food additives; sale of metal materials; sale of petroleum products (other than hazardous chemicals); sale of specialized equipment for the production of petroleum products on a daily basis; sale of paints (other than dangerous chemicals); sale of eco-environmental materials; sale of disinfectant agents (other than dangerous chemicals); sale of glass fibres and products; sale of non-metal mines and products; sale of fire-resistant materials; sale of fibre-optic enhanced plastics; sale of surface functional materials; sale of fire-proof materials; sale of five gold products (in addition to projects authorized by law, business licences)