Happy Lamb is a song written by Zhao Zhen and sung by Mulin. This song was released on August 8, 20 17, and included in the album Happy Lambs of the same name. Chinese mainland singer Mulin has attracted much attention for her unique voice and lovely image. With cheerful melody and warm lyrics, this song describes the story of lambs growing up happily in a happy environment. Mu Lin's singing conveyed this happiness and warmth to the audience and became one of many people's favorite nursery rhymes.