Audio-visual smart engineering (shenzhen) ltd. Is registered at 5 608 science and technology centers located in shenzhen city, on the streets of shenzhen, and is registered with the shenzhen market supervisory authority and represented by zhang jun, and operates in the following general areas: stage light sound, public broadcasting, background music, conference system, security video surveillance, led screens, smart room, smart house, door-to-door shut-down speech system, internet wiring system etc., distribution of equipment, rental services, installation of equipment works, domestic trade, import and export of goods and technology, technical research and technical advice on smart office equipment, consumables, and technology for networking. (except for projects subject to approval before registration by law, administrative regulations and decisions of the state council), licensed projects are: