Manufacturing of specialized railway measuring or testing instruments; manufacturing of instruments and meters; manufacturing of railway rolling stock parts; manufacturing of high-speed rail equipment, accessories and parts; manufacturing of urban rail transit equipment; repair of instruments and meters; research and development of mechanical equipment; software development; information technology consulting services; metrology technical services; sales of specialized railway measuring or testing instruments; sales of instruments and meters; sales of railway rolling stock parts; sales of high-speed rail equipment, accessories and parts; sales of mechanical and electrical equipment; sales of electronic products; sales of software; import and export of goods. Licensed items: inspection and testing services.