Beijing tian shyan science and technology ltd. Is registered on the 27th floor, building 2, 58th zhonghuai street, thongzhou, beijing, and is registered as the market supervision authority of tunhuazhou, beijing, with legal representatives shawsjie, and operates on general projects: technical services, technology development, technical advice, technology exchange, technology transfer, technology extension; computer system services; software development; sale of electronics; research and development of metal products; sale of metal products; development of technology for material networking; production of material networking equipment; sale of material networking equipment; technology services for goods networking; applications for goods networking; sale of security equipment; manufacturing of security equipment; information systems integration services; import and export of goods; and manufacture of metal materials. (except for projects subject to legal authorization, operating inde...