The general business items are: Computer technology services; Technology development of network technology and environmental protection technology; Environmental protection engineering design and construction; General contracting of environmental protection engineering projects; Sales of environmental protection chemicals, new environmental protection catalysts and additives, electronic products, building decoration materials, metal materials, general machinery, mechanical and electrical products and equipment, Wujinjiaodian, mineral products, chemical raw materials and products (excluding hazardous chemicals); Operate import and export business (if the above requirements need to be approved in accordance with laws, administrative regulations, decisions of the State Council, etc., the relevant approval documents can be obtained in accordance with the law). The licensed business items are: Sales of Class I, Class II and Class III medical devices; Sales of petroleum products.