Know.
Yan'er was willing to die for Di Guangyuan, but Linglong later realized that she had felt this way before. She was willing to die for the prince, so she repented and went to find Di Renjie. Wanted to clarify everything, but at this time Wu Chengsi and Zixu came in. Zixu wanted to kill the "bitch woman", Di Renjie stopped him and exposed the truth. Zixu was going crazy with pain, and Linglong was also in pain.
There was no touching scene of mother and son recognizing each other. Linglong was imprisoned in the heavenly prison. Tang Zixian, fearing that he would be exposed, forged an imperial edict and entered the heavenly prison to poison Linglong to death. Linglong didn't know that Prince Li Xian was still alive until her death. Alas, Li Xian was so sad that he almost died.
Extended information:
Character introduction
Di Renjie
Idle fu is at home, Zhang Jianzhi invites Di Renjie to investigate the prince's case. In the process, it was discovered that the prince had faked his death to escape the world. After finding the whereabouts of the prince, he brought the prince back to the palace, and then the prince committed suicide. Di Renjie was demoted to the prefect of Bozhou due to poor supervision.
Linglong
Ben was a simple and lovely flower girl. Although she was smart, she fell in love with the prince at first sight because of her innocence. However, the relationship between the two was completely buried by the changes in the political situation, which made her frustrated and hateful because of love, and turned into a female killer intent on revenge on the court.
Di Guangyuan
Di Guangyuan, the son of Di Renjie, was taken as a hostage by Wu Zetian and lived in the palace since he was a child. When he grew up, he was handsome and capable, capable of not only literature but also martial arts, and became Wu Zetian's In order for his father to return to the capital, Di Guangyuan began to overturn his father's case.
Jinyuan
Wu Zetian’s grand-niece, because of a trouble, met Di Guangyuan, the son of Di Gong, who had grown up and was promoted to the chief of the palace guard. The two fell in love with each other during the quarrel.
Baidu Encyclopedia - Prequel to Detective Di Renjie