"Thirty years without forgetting our original intentions and heading into a new era" The 2018 Qingcheng District Teachers and Staff Literary Performance was held in the Great Hall of the Qingyuan International Convention and Exhibition Center. 21 performance units from the district's education system and about 550 teachers participated in the performance. A gift in the new era, a tribute to the thirtieth anniversary of the establishment of the city, and help Qingyuan Chuangwen create! In order to meet the audio-visual needs of every listener, the Beilarly engineers used Q4 line array, four dual 15-inch subwoofers and eight back listening speakers. The sound field of the entire auditorium is not only evenly covered, but also the sound quality is clear, making the middle frequency round and full, the high frequency is delicate, and the low frequency dive is full of flexibility; to ensure that every corner of the auditorium can enjoy a perfect music experience.