4000 years old, you should not be ashamed. This lyric comes from a lyric in Seven Sesame Officials of Henan Opera, which is sung by Cheng Tang, the protagonist played by Niu, a Henan Opera performer. After being framed by Yan and his son, Cheng Tang made a big speech, recounted the crimes of Yan and his son, and advised Yan and his son not to be ashamed. Niu is a famous clown master in Henan Opera, whose original name is Niu, and Niu is a stage name. He is from Kaifeng City, Henan Province. Like Chen Suzhen, Chang Xiangyu and Tang Xicheng, Niu Cao De is deeply loved by Henan opera lovers all over the country. He is skilled, good at clowns and has a humorous singing style. Representative works include Xi Juan Map, The Trial of Tang Magistrate, etc.