Sales of chemical products (excluding licensed chemical products); production of chemical products (excluding licensed chemical products); information technology consulting services; technical services, technology development, technical consulting, technology exchange, technology transfer, technology promotion; tool manufacturing; tool sales; Internet sales (except for the sale of goods that require permission ); sales of metal tools; production and sales: various types of vacuum impregnation equipment, impregnation (leak repair) agents, air nail guns; general mechanical parts, auto parts, motorcycle parts (excluding engines) casting and cold work processing; sales: sanitary ware, building materials (excluding hazardous chemicals), power tools, Wujijiaodian.