Beijing yang jing science ltd., with its registered address in room 219, 2nd floor, tang jiaxing village no. 3, north-west wan dynamite, beijing city, with its registered body, the market supervision authority of haidian district, beijing city, with its legal representatives, transports china, including technology development, technology transfer, technical advice, technical services, technology promotion; computer technology training; engineering and technical research and testing development; import and export of goods, export and import of technology, import and export of technology, import and export of agents; data processing (except for the bank card centre in data processing and the cloud computing data centre with a value of 1. 5 or more); product design; instrument instrumentation maintenance; sale of medical equipment i, mechanical equipment, electronics, communications equipment, hardware, computers, software and assistive equipment; computer systems services; computer ma...