General equipment manufacturing (excluding special equipment manufacturing); Construction engineering machinery manufacturing; Construction engineering machinery sales; Special equipment manufacturing (excluding licensed professional equipment manufacturing); Building materials production special machinery manufacturing; General equipment repair; Special equipment repair; Special equipment sales; Automobile sales; New energy vehicle sales; Mechanical equipment sales; Mechanical parts and components sales; Hydraulic power machinery and components manufacturing; Hydraulic power machinery and components sales; Automotive parts retail; Agricultural machinery manufacturing; Electronic and mechanical equipment maintenance (excluding special equipment); Lubricating oil sales; General mechanical equipment installation services; Special equipment leasing; Construction machinery and equipment leasing; Mechanical equipment R&D; New energy technology R&D; Import and export of goods; Technology import and export. Licensed items: Road motor vehicle manufacturing; Special equipment installation, modification and repair; Special equipment manufacturing; Special equipment design.