The past is like a dream, a dream for eternity, Zhuang Sheng dreamed of a butterfly, a dream, a butterfly, the heart moves with the emotion, obsessed with it for eternity, reincarnation from generation to generation, sighing, sighing, fifty strings of brocade strings for no reason, one string and one column, thinking about the past. Zhuang Sheng was obsessed with butterflies in his dawn dream, and looked forward to the emperor's spring heart with cuckoos. The bright moon in the sea has tears, and the warm sun in Lantian produces smoke. This feeling can be recalled later, but it was already at a loss.