Sales of rail transit engineering machinery and parts; sales of testing machines; information technology consulting services; domestic trade agency; sales agency; import and export of goods; sales of high-speed rail equipment and parts; sales of special measuring or testing instruments for railways; sales of railway locomotive and rolling stock parts; leasing services (excluding licensed leasing services); software development; software sales; manufacturing of special equipment for electrical engineering; manufacturing of metal cutting machine tools; manufacturing of metal cutting and welding equipment; auxiliary activities for railway transport; manufacturing of industrial robots; manufacturing of special equipment (excluding licensed special equipment); processing of mechanical parts and components; leasing of mechanical equipment; manufacturing of special measuring or testing instruments for railways; technical services, technical development, technical consulting, technical exchange, technology transfer, and technology promotion; sales of basic equipment for railway transport; manufacturing of general equipment (excluding special equipment); manufacturing of CNC machine tools; manufacturing of machine tool functional parts and accessories; manufacturing of high-speed rail equipment and parts; repair of general equipment; installation and maintenance of industrial robots; manufacturing of intelligent basic manufacturing equipment; manufacturing of testing machines; manufacturing of metal forming machine tools. Licensed items: manufacturing of basic equipment for railway transport; repair of railway locomotives and rolling stock.