The background music is "The Love of My Life", a song written by Tang Shuchen and composed and sung by Lu Guanting. It was composed as the ending theme of Stephen Chow's classic movie "The Marriage of the Monkey King". The song describes the growth of a boy into a The man's process expresses a deep lovesickness that is both helpless and sad.

Singye seems to have a special liking for this song, and it has been used repeatedly in subsequent movies related to Journey to the West. For example, in the 2013 version of "The Love of My Life", Singye revised the lyrics and Shu Qi sang it, using The theme song of "Journey to the West: Conquering the Demons". The 2016 version was re-arranged by Lu Guanting and his wife and sung by Han Geng. It was used as the theme song of the movie "Westward Journey 3".