Manufacture of metal products; Production of automatic tie rods; Assembly and production of electromechanical and electronic products. Sales: Metal products, automatic tie rods, electromechanical products, electronic products (excluding electronic publications); Services: Technical development and technical services for electronic computers and network application engineering; Import and export of goods (technology) (excluding items prohibited by laws and administrative regulations, restricted items require a license before operation). R&D, production, sales, installation, and technical services of public safety series products for roads, traffic, and vehicles, monitoring equipment, fire-fighting equipment, and security products; Overall solutions and technical services for internet and big data platforms; R&D, sales, installation, and technical services of public safety early warning systems; Sales of flame-retardant materials, automobiles, and auto parts.