In the TV series "Regret for the Past", You Yifan's background is the son of Hanwang Zhu, who was angry at his father because his mother was framed, and then ran away from home and was saved, which is why he later stood with Zhu to frame him.

You Yifan's fictional story is based on Zhu Zhanqi's experience. Because Zhu Zhanqi's mother was killed by her father Zhu, their father and son not only turned against each other, but Zhu Zhanqi also played his father's evil deeds to Yongle Emperor many times and reported things unknown to outsiders. Therefore, it is called "How can father and son endure", and Zhu also knows this.

The ending of Regret for the Past

You Yifan is the commander-in-chief of the Royal Guards on the surface, but with him, his real identity is the son of Hanwang, whose real name is Zhu, and he plans to kill the king from the inside with Hanwang. In order to threaten Zhu Zhanji, You Yifan has been secretly lobbying Yao Ziheng to join hands with him. After the lobbying failed, he tried to kill her.

After Hanwang rebels entered the palace, in order to rescue You Yifan, Zhu Zhanji personally led troops to confront You Yifan, persuaded him to lay down his arms, and made contributions by apologizing. You Yifan was stubborn and died by the sword of Zhu Zhanji. After putting down the rebellion, Zhu Zhanji acceded to the throne and became the fifth emperor of the Ming Dynasty, Ming Xuanzong. He abolished his original wife Hu Shanxiang and named Yao Zilian the Queen of Sun.