My company's main alkylenone dimer production and sales, dangerous chemicals production; Management of hazardous chemicals; Production of specific organic chemicals containing phosphorus, sulfur and fluorine in category II and Iii MCCS and Category IV MCCS; Storage of hazardous chemicals; The second category of value-added telecommunications services. (For projects subject to approval according to law, business activities can be carried out only after approval by relevant departments. Specific business items shall be subject to approval documents or licenses of relevant departments.) general items: sales of special chemical products (excluding dangerous chemicals); Manufacturing of special chemical products (excluding dangerous chemicals);