It's Zhu Zhichao, which was used by Wei Wei to replace the square wood. Moreover, Yafan's body is well preserved, and there are no other scars except the marks on his neck. Javan was strangled, and Fang Mu didn't know it at that time. When the police brought Javan back, Fang Mu called Wu Xue and asked if Mi Nan was there to protect Mi Nan. As a result, it was learned from Wu Xue that it was Yafan, which also prompted Fang Mu to decide to end it by police, and Wei Wei learned Fang Mu's plan.

Extended data

"City Light of Psychological Crime" is a crime film jointly produced by Shanghai Film Group Co., Ltd. and Anle (Beijing) Film Distribution Co., Ltd., directed by Xu Jizhou, starring Deng Chao, Ai Hanjuan, Liu Shishi, Yu Ailei and Chen Xiaoxuan, featuring Lin Jiaxin, and starring Guo Jingfei and Remy in friendship.

The film is adapted from the last novel "City Light" in Remy's series of criminal novels "Psychological Crime", which tells the story of detective Fang Mu arresting a high IQ perverted murderer. The film was released in China on February 22, 20 17.

Baidu Encyclopedia: The City Light of Psychological Crime