What is Yutangchun talking about?

Yu Tang Chun tells the story that Wang Jinglong, the third son of Shangshu in Ming Dynasty, fell in love with Su San, a famous prostitute of Beijing School, and named Su San Yu Tang Chun for life. The prince spent all his money in the brothel, was driven out of the brothel by the madam, and was trapped in the king's temple. Susan gave him money to take the exam in Beijing. Susan was sold to Shen, a wealthy businessman in Shaanxi, as a concubine. Shen's wife had an affair with Zhao Jiansheng, killed her husband and framed Susan. The county magistrate took bribes, and Su San was wronged and sentenced to death. Wang Jinglong took the exam in the No.38 High School and ordered a review of the case of the fishing hall in Shaanxi. Su San was dismissed and the three courts were unified. Susan knelt down and sued the whole story, and this unjust case became clear. Yutangchun and Wang Jinglong are reunited.