According to Kuwo Music, the song "Happy Love" was sung by Guo Ling and Yong Chen, written by A Lang and arranged by A Lang. The release date is 20111-65438.
Part of the lyrics: Qinghe flows quietly, and the evening wind blows the sunset. The most beautiful girl in my heart is on the other side of the river. Every time I walk past her, I can't help looking back.