This song "Nightmare" combines the elements of China traditional opera, and its style is desolate and sad. It aims to highlight the uniqueness and distinguishable colors of this song, especially the op part of the song and the opera singing selected from the soundtrack of Farewell My Concubine, which is a kind of nostalgia for Butterfly Clothes.

After all, Cheng Dieyi, who played the devil crazily, paid too much for the wrong love and finally committed suicide. This classic film is always in tears when he recalls it, and the sad story is always unforgettable.