At the Double Eleven event performance in the Vientiane City shopping mall in Hangzhou, Beilarly audio engineers developed a sound solution for them based on the characteristics of outdoor performances and the requirements for the sound: using the Q10 line array of the Beilarly brand with ES218 ultra low STX-815M back listening and other products make the sound field of the whole performance 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.