The swallow who filmed the video in Shaanxi is called Yan Zheng. Internet celebrity Yan is a dancer. Yan is a native of Dingbian County, Yulin City, Shaanxi Province. As soon as the sun went down, she dragged the suitcase-style stereo to the square as usual, led a group of people to dance square dance and became popular on the Internet. Her dance team often attends the opening ceremony of enterprise stores, and sometimes makes a series of catwalks for local businesses, which not only publicizes others, but also enriches themselves.