Along with the speedier pace of urbanization, synthesis estate has merged into social development. Shopping malls, commercial shopping avenue, star hotels, high-end residential of larger scale have gradually become the main focal of urban construction. On one hand, it is because of the rapid development, on the other the pursue of quality living by the population. HUIYUN intelligent management system, network system and audio-visual system and other forms of multi-media systems are to meet the city's development. 

Audio-video system includes: background music broadcast system, large-screen LED display system and professional lighting, audio multimedia system. of which the background music broadcasting system is the most basic business system. 

Main functions of the business are as follows:

1.Background music broadcast.

Play different background music in different region with set time, to create a relaxing site ambience, work environment and cozy residential ambience. 

2.Daily task area broadcast.

The system implements centralized and unified management, to manage different area partially or whole, with announcement broadcast and personnel location. A number of paging points, such as mall broadcasting room, office broadcasting service desk, Hotel broadcasting room, parking lot broadcasting room are set up to achieve zoning and comprehensive broadcast.

3.Local audio amplifying and paging function

In different area, local voice amplification can be used to broadcast information and personalized music.

4.Emergency broadcasting and firefighting joint control 

The broadcasting system is connected with the firefighting system. When a fire occurs, the firefighting joint equipment is triggered. The firefighting broadcasting is carried out through pre-set procedures to avoid casualties and property losses and ensure the safety of all personnel.