Zheng Yingjun, played by Jin Yingguang, the hero of Destiny, is a serial pervert murderer. He represents a crime, an evil divorced from the basic goodness of human nature. In the play, he did have a chance to kill the policewoman, but he didn't. Personally, the main reasons can be understood from the following aspects:

1. Kind heart: Although Jin Yingguang plays a perverted murderer, there is still kindness and emotion in his heart. His sincere love for the heroine in the play may have restrained him from committing violence and killing. The night before his death, he chose to be with the heroine, and this love was fully displayed.

2. Self-protection: Although he is a serial murderer, it doesn't mean that he has no reason and IQ. He knew that killing a policeman would bring serious consequences and may affect his escape plan and his own safety, so he chose not to kill at this moment.

3. The plot needs: The story line of the perverted murderer and policewoman in the play may be deliberately arranged by the director. If the man killed the policewoman at this time, the direction of the plot may be completely different. What the director wants to convey may be that in the face of the crime and punishment of "an eye for an eye", the value of love is even higher than the punishment itself. Therefore, the man chose not to kill the policewoman at this critical moment, probably to match the trend of the plot.

Generally speaking, Jin Yingguang, the hero of Destiny's Man, is a complicated character. He has both evil and violence, as well as kindness and emotion. He didn't kill the policewoman at the critical moment, which can be understood in many ways.