As a major government project, the entire large-screen control system should have perfect integrity, high reliability and easy operation, the whole system selected (GEFFEN Guangzhou Gefen) high-bandwidth RGBHV series 32 in and 32 out matrix distributors(GF-RGB3232) and (GEFFEN Guangzhou Gefen) AUDIO 32 IN 32 OUT Matrix Distributor (GF-AUDIO3232), so as to conveniently control the zooming, overlay and splicing of any screen in the conference hall.