Hello, the background music of this promotional video comes from the song "junior dance" of the same name by the Dutch female singer Kim-Lian van der Meij. The song is for this program A specially composed theme song. See screenshot below. In view of the fact that the author may not be able to download the song in China, I converted it from a video on a tube website to MP3 and uploaded it to the attachment. Please feel free to download it.