In "I am a Witness", Zhu plays the role, and the reason for her transformation is to retaliate against society because of her sister's accidental death.

Tang Zheng: The suspect was originally a plastic surgeon. Because of my sister's accidental death, she retaliated against the society, used the "only date" software to ask out girls everywhere, and when she arrived, she was imprisoned and killed. The vicious "pervert killer" pursued Lu Xiaoxing and Lin Chong all the way.

I am a witness tells the thrilling story that two witnesses with different testimonies appear in a murder case, but they jointly pursue the murderer afterwards.