"The Clown of Yingying Xiangyue". The background music of Douyin's Little Dark Room for Empty Nesters is Peking Opera singing, which is very nice. The background music is called "The Clown of Yingying Xiangyue", and the last song played is "Crescent Bay". Douyin is a music and creative short video social software incubated by ByteDance. The software was launched in September 2016 and is a short video community platform for all ages.