Zhang Liwei, a traffic policeman, is the prototype of many excellent traffic policemen. According to relevant information, Zhang Liwei has concentrated many excellent traffic policemen, and his persistence and sacrifice should be respected by many people. Zhang Liwei in the play is the detachment leader of Beijiang Traffic Police Detachment, a good policeman who is supported by the police and the people. His wit enables him to avoid danger and deal with difficult problems properly in the face of complex situations.