Road freight transportation (excluding dangerous goods). General items: Technical services, technology development, technical consultation, technology exchange, technology transfer, and technology promotion; Manufacturing of transformers, rectifiers, and inductors; Manufacturing of power facility equipment; Sales of power facility equipment; Manufacturing of power transmission and distribution and control equipment; Sales of intelligent power transmission and distribution and control equipment; Manufacturing of power distribution switchgear equipment; Manufacturing of mechanical and electrical equipment; Sales of mechanical and electrical equipment; Manufacturing of fans and blowers; Sales of fans and blowers; Manufacturing of generators and generator sets; Sales of wind turbine generator sets and parts; Manufacturing of photovoltaic equipment and components; Sales of photovoltaic equipment and components; Research and development of metal products; Sales of metal products; Sales of metal materials; Sales of mechanical parts and components; Manufacturing of construction machinery; Sales of mechanical equipment; Sales of construction machinery; Manufacturing of general equipment (excluding special equipment); Manufacturing of specialized equipment (excluding licensed specialized equipment); Manufacturing of general parts; Road freight transportation of general goods with a total mass of 4.5 tons or less (excluding online freight and dangerous goods); Goods import and export; Technology import and export; Import and export agency.