1. According to official website's short video of vibrato, we can know that the background music that we haven't walked enough comes from the song "Leaves under Leaves". The lyrics are "Friends who love singing get together, the stage is colorful, and the beautiful songs shake our hands. We swing with the music, waving our hands and throwing them around quickly, cheering like an avalanche".
2. The song "Leaves under Leaves" was sung by Yang Biao with lyrics, which described the creation background of this song and called on everyone to dance and have fun together.