On the morning of March 18, 2019, the Yamato Thermal Magnetic Changshan Industrial Park was completed and put into operation. Zhang Shaohua, deputy secretary of the county party committee and county magistrate, delivered a speech. Leaders of Changshan County, Lin Honghan, He Jian, and Duan Weibin attended the meeting, and Vice President of Japan Magnetic Fluid Technology Co., Ltd., Mr. Yamamura. Beilarly professional audio equipment helped the completion ceremony of Changshan Industrial Park. According to the sound field characteristics of the lecture hall, Beilarly ’s engineers used 10 as a dual 10-inch line array sound system as the main sound reinforcement and ES supplement to make the whole multi-functional The sound field in the lecture hall is not only evenly covered, but also the sound quality is clear, high fidelity, and there is no harsh noise, making the middle frequency round and full, the high frequency is delicate, and the low frequency diving is full of flexibility, ensuring that the sound in each corner of the hall is bright and transparent .