This piece draws material from Kunqu opera “Si Fan”, where a young nun dreams of returning to a secular life. Musicians of Peking opera adapted the tune, and titled the piece using the first 3 characters of the libretto. The terse structure and decisive rhythms of Night Thoughts lead to its common use of accompanying famous climatic, action-packed scenes in Peking opera like “The Beratement of Cao Cao” and “Xiang Yu Bids Farewell to his Concubine”.