Dacheng Town is located 30 kilometers east of Tonggu County, bordering Xiushui County in the east, and Yifeng County in the west, with an area of 205.69 square kilometers. It has jurisdiction over 13 administrative villages and 1 neighborhood committee with a total population of more than 24,000. It was listed as 1995. Construction of pilot towns in 500 small towns nationwide. Beverly Cheng chose the ES series according to the size and function of the meeting room. The sound field of the whole meeting room was not only evenly covered, but also the sound quality was clear and high fidelity, making the mid-range round and full, the high frequency is delicate, and the low frequency dives. Full flexibility, to ensure that the sound of each corner of the meeting room is thick, bright and prominent.