Million people auditorium capacity of 93000 cubic meters, is currently the world's largest indoor auditorium. Between 1980 and 1990, the reconstruction of the sound reinforcement system was carried out, especially after the reconstruction in 1990, which solved the problem of linguistic clarity. After entering the 90's, the auditorium used more widely, more demanding, with the electro-acoustic technology continues to progress and progress, the auditorium built after 40 years has been the existence of architectural acoustics affect the sound quality and clarity and other issues in the Beijing Zhonghua Electronic Technology Co., Ltd. Company to undertake the transformation of the sound system has been resolved over the past few years, major political conferences and performances that sound good.