Application software development; research, development, testing, maintenance, and sales of industrial automatic control system equipment; research, development, manufacturing, testing, and maintenance of instruments and meters; kitchen and bathroom utensils, lighting fixtures and accessories, explosion-proof lights, rubber products, oil well logging instruments and equipment, valves, pumps and accessories, wires and cables, refrigeration and air conditioning equipment, household appliances, safety automation monitoring equipment, social public security equipment and materials, block hole heat exchangers, auto parts, plastic products, wind turbine generators, tires, thermal and sound insulation materials, environmental protection dedicated equipment, prefabricated buildings, traffic and public management metal signs, electronic products, oil drilling special equipment and accessories, water treatment equipment and accessories, stationery, fire alarms, steel, mold standard parts, fasteners, transformers, welding rods, agricultural machinery, wooden floors, glass products, ceramic products, die sets, tents, canvas, chemical products (excluding hazardous chemicals, flammable and explosive items, and highly toxic substances), metal products (excluding precious metals), wood products, fertilizers, coal, furniture, sports goods (excluding crossbows), lubricants, computers, software and auxiliary equipment, daily sundries, knitted goods, textiles, clothing, shoes and hats, poultry feed, elevators, building materials, cleaning supplies; manufacture of electrical equipment (excluding projects prohibited by the state); manufacture, maintenance, and sales of electronic components, lighting fixtures, and accessories; wood processing and sales; energy-saving technology promotion services, information technology consulting services, information system integration services.