It is rumored online that the original song is "Light and Shadow (Sorrow)" by Jacqueline Dupree, which is actually a misinformation and should be composed by Xu Jialiang. This song was first used as the ending theme of the TV series "Oolong". When it was used again as the theme song of the TV series "Love Through Time" in 2002, it became an instant hit with the popularity of the TV series. The song was also used in the two TV series "New Shushan Swordsman" and "New Strange Stories from a Chinese Studio 2".