Research and development of mechanical equipment; Manufacturing of electrical signal equipment devices; Sales of electrical signal equipment devices; Manufacturing of specialized equipment for traffic safety and control; Manufacturing of lighting fixtures; Sales of lighting fixtures; Integration of intelligent control systems; Manufacturing of metal signs for traffic and public management; Sales of traffic and public management signs; Manufacturing of mechanical and electrical equipment; Sales of mechanical and electrical equipment; Sales of electrical equipment; Manufacturing of electronic specialized equipment; Manufacturing of electronic components; Manufacturing of power electronic components; Sales of power electronic components; Sales of electronic products; Manufacturing of auto parts and accessories; Wholesale of auto parts; Manufacturing of agricultural, forestry, animal husbandry, and fishery machinery parts; Sales of agricultural, forestry, animal husbandry, and fishery machinery parts; Sales of metal products; Manufacturing of metal chains and other metal products; Sales of metal chains and other metal products; Manufacturing of hardware products; Wholesale of hardware products; Manufacturing of rubber products; Sales of rubber products; Manufacturing of plastic products; Sales of plastic products; Import and export of goods; Import and export of technology. Licensed items: Production of road motor vehicles.