The registration address of beijing huatai ark science and technology ltd. Is located on the 6th floor of building 5 of chaoyang road 3 in beijing city, and its legal representative is liu yunxia, the market supervision authority of beijing city hoangyang district, which operates on general items: technical services, technology development, technical advice, technology exchange, technology promotion; sale of sound equipment; sale of lighting equipment; manufacture of radio and television equipment (without radio and television transmission equipment); sale of radio and television transmission equipment; sale of radio and television equipment; professional repair of radio and television equipment; sale of cameras and equipment; video and video production services; sale of teaching equipment; sale of teaching models and teaching aids; retailing of stationery supplies; retailing of sports and equipment; distribution of information systems; maintenance services for the operation of information systems; computer systems; services for computer and office equipment; wholesale distribution of computer hardware and assistive equipment; sale of electronic products; sale of communications equipment; software development; advertising and agency; advertising agency; design of digital advertising; production services; production of digital content production services (without publication); distribution of digital content; application of digital cultural ideas; digital video monitoring system; rental of construction construction and rental (except for projects subject to legal authorization, operating independently of the law by means of a business licence) (no activity shall be carried out in which the state and municipal industrial policy prohibits and restricts the operation of such projects