The song "Xiao Juan". According to QQ Music and Cool Dog Music official website, we know that. The song "Xiao Juan Er" was sung by singer Zhang Helun and included in the album "Xiao Juan Er". Part of the lyrics are: Xiao Juan er, Xiao Juan er, where are you, our sauerkraut is full, Xiao Juan er, Xiao Juan er, do you remember the part we sang together when we were young? Oh, dear, my shoes are leaking. The teacher asked me to pay the tuition, and I said to wait two days.