Excellent students in the police university. According to the data of Tencent's video TV series "Vampire Detective", in the first episode of "Vampire Detective", You Zheng, as an outstanding student in the police university, was met by Park Changxiu and assigned the three men an important task to infiltrate a criminal organization that was secretly searching. Due to the failure of the mission, You Zheng shot Yin Shan in the shoulder, but he and Tai mutually assured destruction.