Yang San, whose real name is Yang Mingyu (Yu Ming), ranks third among the brothers, so everyone calls him Yang San. He sings Kunqu opera and plays a clown, generally called Kun Chou, because he was born in Kunban, Suzhou, also called Su Chou. During the reign of Tongzhi and Guangxu, there was a saying that there were "thirteen unique talents with the same light", among which there were only two clowns, one was ugly in Beijing (Liu Baoshan) and the other was ugly in Su.

Susan is a role in the drama. Su San was originally named Zhou Yujie, also known as Gu Lichun, from Quzhou County, Guangping District, Hebei Province (now Quzhou County, Handan City, Hebei Province). When she was five years old, her parents died, and she was trafficked to a brothel in Huai Su, Beijing, so she changed her surname to Su San, and "Yutangchun" was her flower name.

Da ji, the queen of Shang Zhouwang, surnamed da ji, has a daughter of Su tribe and a Suzhou (now wen county, Jiaozuo City, Henan Province). Legend has it that da ji is a beauty. According to "Guoyu Yujin", he set out to attack the Su tribe. Some Su tribes could not resist the powerful attack of the Shang army. Between extinction and kneeling, some Su tribal leaders chose to kneel down and gave all their cattle, sheep and horses beauty da ji. Chronicle of Bamboo Slips records that Di Xin attacked Su You for nine years and married da ji, while Century of the Emperor records that Di Xin married da ji in the second year.