Manufacturing of railway-specific measuring or testing instruments; manufacturing of railway locomotive and rolling stock parts; manufacturing of high-speed rail equipment and parts; manufacturing of industrial control computers and systems; manufacturing of computer hardware, software, and peripherals; manufacturing of digital video surveillance systems; manufacturing of electrical signal equipment devices; manufacturing of electronic (gas) physical equipment and other electronic equipment; manufacturing of mechanical and electrical equipment; manufacturing of industrial robots; additive manufacturing; metal surface treatment and heat treatment processing; software development; software sales; information system integration services; technical services, technical development, technical consulting, technical exchange, technology transfer, and technology promotion; repair of specialized equipment; railway transportation auxiliary activities; security technology prevention system design and construction services; sales of railway transportation infrastructure equipment; sales of railway-specific measuring or testing instruments; sales of railway locomotive and rolling stock parts; sales of high-speed rail equipment and parts; sales of rail transit-specific equipment, key systems, and components; sales of industrial control computers and systems; retail of computer hardware, software, and auxiliary equipment; sales of digital video surveillance systems; sales of electrical signal equipment devices; sales of industrial robots; sales of mechanical and electrical equipment; retail of electronic components; sales of communication equipment; sales of electronic products; sales of additive manufacturing equipment; sales of instruments and meters; sales of seals; sales of communication equipment; wire and cable operations; retail of hardware products; sales of office equipment. Licensed projects: construction engineering construction; construction labor subcontracting; electrical installation services.