Oil drilling technology development and promotion services; Computer software development; Import and export of goods、 Technology import and export; Trade Agent; Sale: Petroleum machinery and equipment and accessories, water treatment equipment, Small machines, Downhole Tools, Hardware tools, Instruments, Computers and auxiliary equipment, Plumbing equipment, communications equipment, lighting equipment, Disinfection supplies, Electronics, Knitted textiles, Clothing, shoes and hats, Daily necessities, office supplies, sporting goods, stationery, glass products, steel, Building Materials, Miscellaneous items, furniture, Home appliances, Decoration materials,kitchen、 Bathroom appliances, Industrial and mining accessories, plastic products; Planting and sales of flowers, plants and seedlings; Car detailing services; Oil drilling equipment and accessories, Mechanical equipment and accessories, lathe, CNC machine tools, welding equipment, Pump production、 repair、 Leasing and sales; Manufacturing and sales: shock absorbers, compressor, blower, hydraulic system, Valves and accessories, Safety、 Metal products for firefighting, Chemical products、 welding materials( The above two items do not contain hazardous chemicals、 Flammable, explosive and highly toxic substances), rubber products( Except medical devices), Daily glass products, electric wire、 cable, motor, Distribution switch control equipment, auto parts, Daily plastic products, measuring tools, cutting tools, Machine tool accessories, Crane accessories, Environmental protection equipment and accessories, Snow removal equipment and accessories, lubricating oil, Metal products( No hazardous chemicals、 Flammable and explosive materials、 Highly toxic substances and precious metals), Fiberglass products, stainless steel products,I Medical devices, plastic board、 Tube、 Profiles, Railway locomotive and vehicle parts, tent、 canvas, Pipeline equipment, refractory materials( Except for projects prohibited or restricted by industrial policies); Metal surface treatment and heat treatment processing( Except for projects prohibited or restricted by industrial policies); General equipment repair; Special equipment repair; Machinery and equipment operating lease; Testing Services。