Fuel dispenser, gas station supporting equipment, testing equipment manufacturing; precision machinery, metal composite material processing; oil depot (station) equipment on-site modification, repair, installation; oil vapor recovery online monitoring equipment production; vehicle modification and trailer production; diesel exhaust fluid dispensing equipment, electric vehicle charging equipment, CNG dispenser complete units, LNG dispenser complete units, pump skids, explosion-proof electrical products, energy-saving and environmental protection equipment production, sales, and technical services; computer software development and technical services; decoration and renovation engineering design and construction; civil engineering construction; earthwork engineering, building engineering, water supply and drainage engineering, steel structure engineering, building intelligent engineering design and construction; self-operated and agent import and export of various goods and technologies, except those restricted or prohibited by the state.