This is because Jiang Aiai's departure was blamed by the Yang family, and later he became crazy if he couldn't accept it. Yang Doujin in the play is a person who can do superficial kung fu. Third sister followed him and was abused by him and the Yang family. Later, with the help of my colleague Jiang Aiai, Third Sister was able to jump out of the fire pit.
Jiang Aiai appreciates Yang Doujin and thinks he is attractive enough. Besides, Jiang Aiai is young and beautiful, so he wants to divorce Third Sister.