Technical services, technology development, technical consultation, technology exchange, technology transfer, technology promotion; mechanical equipment research and development; sales of electronic components and electromechanical components and equipment; wholesale of auto parts and accessories; retail of auto parts and accessories; wholesale of motorcycles and spare parts; retail of motorcycles and spare parts; sales of metal materials; sales of building materials; wholesale of computer software, hardware and auxiliary equipment; retail of computer software, hardware and auxiliary equipment; sales of chemical products (excluding licensed chemical products); import and export of goods; import and export of technology; sales of communication equipment.