In the TV series "Pursuit", Zheng He is a father-daughter relationship. The relationship between Mike and Zheng Xiaoji in the play is interdependent. They cooperated with each other to solve some cases together.

Mike is a famous expert in trace testing, and Zheng Jiong is a psychologist. The combination of the two enables them to analyze the case from both psychological and physiological perspectives, so as to understand the truth of the case more comprehensively.