The reason why a person commits suicide must be because he has no love in life. What Cheng Dieyi cared about most and only in his life was Peking Opera and his senior brother Duan Xiaolou. Peking Opera suffered heavy losses during the Cultural Revolution, and in Cheng Dieyi's opinion, it was dead; Duan Xiaolou was also beaten during the Cultural Revolution, and he lost his humanity as a result of the fight. He no longer had the fearless toughness of the Overlord. The people and things Cheng Dieyi cared about most were ruined. Maybe he had thought about committing suicide during the Cultural Revolution, but although Peking Opera died, Duan Xiaolou was still alive, and he might have been holding on to the hope of singing an opera with his senior brother again. After the Cultural Revolution, he had such an opportunity, and his wish came true. Coupled with Duan Xiaolou's words: "Wrong, wrong again", Cheng Dieyi was reminded that he was originally a man, not a woman, and that his life's sustenance was not what it should have been. It suddenly occurred to him that When I woke up from the dream, I was completely in despair, so I had no choice but to cut my neck, just like Yu Ji said goodbye to her overlord. Although it was out of despair, he managed to persevere in the end. Cheng Dieyi is a fool, and drama is inseparable from life. When he first sang "Sifan", he believed that he was a man in life, so he refused to admit that he was a woman in the play. He didn't know that life and play were not the same thing. Later, Duan Xiaolou used extreme methods to make him admit that he was a woman, and he suddenly realized that the senior brother he cared about most also wanted him to be a woman. So, he brought this into the play, but never came out of the play.