Shenzhen city, shenzhen city, shenzhen city, shenzhen city, shenzhen city, shenzhen city, shenzhen city, shenzhen city, shenzhen city, shenzhen city, changda-fei technology ltd., is registered at 4th of 4th of the rich community road 310, shenzhen city, shenzhen city market supervisory authority, and is represented by a legal person, hao shenzhen city, and operates on general lines of operation: development and sale of electronics, building materials, electronic locks, door-locks and smart locks; domestic trade; import and export of goods and technology. The manufacture of hardware products (with the exception of projects subject to authorization before registration by law, administrative regulations, and decisions of the state council). (in addition to projects subject to legal authorization, projects are licensed to operate on an autonomous basis under a legal licence.)。