Technical services for water utilization of coking, desulfurization and decyanation wastewater; technical research on new functional materials; manufacturing of calcium thiocyanate; manufacturing of compound wood preservatives, compound fishing net anti-algae agents, and new compound concrete antifreeze ; Sales of chemical products and raw materials (excluding hazardous chemicals); processing of sodium thiocyanate, potassium thiocyanate, cuprous thiocyanate, and ammonium thiocyanate; manufacturing and sales of special equipment for environmental protection; self-operated and Acting as an agent for the import and export of various commodities and technologies (except for commodities and technologies that are restricted by the state or prohibited from being imported and exported); design and technical services for industrial wastewater and gas treatment solutions; design and construction of environmental protection projects. (Projects that require approval according to law can only be carried out with the approval of relevant departments)