This public promotion performance is given by the Loop Vocal Group and the Shenzhen Haiyin Choir. Shenzhen Haiyin Choir has received wide acclaim since its establishment. In order to promote and popularize a-cappella culture, Loop has initiated a series of education programs and performances. Songs for this performance include “Mary Did You Know”, “Attention”, “Despacito × Shape of You”, “Fill a Me Up”, and “Beside the Lake Baikal” among others.