Beijing and science and technology ltd. Is registered in building 1-1509, no. 13, north chao-yang district, beijing. The registration authority is the market supervisory authority of the beijing ho-yang district, with legal representatives, and operates on general items: technical services, technology development, technical advice, technology exchange, technology transfer, technology promotion; conference and exhibition services; teaching models and teaching aids manufacturing; stationery manufacturing; specialized equipment manufacturing; office equipment manufacturing; sale of office equipment; maintenance of computers and office equipment; sale of teaching models and teaching aids; installation and maintenance services; sale of sound equipment; sale of communications equipment; repair of communications equipment; manufacture of lighting equipment; sale of lighting; rental of cultural supplies; production of digital video surveillance systems; distribution of network equipment; pr...