The young man sitting opposite me, twenty-three, four years old, his name is Cheng Qiang, a police officer from the police station, sitting close to me against the window, known as Lao Guan, sitting on the other side of my left hand, known as Lao Han, both of them are fifty years old, both of them are auxiliary police officers of the police station, and they are not formal police officers, but they are all formal police uniforms.