39 years old, armed policeman, suspect in the family massacre, twin brother of Guan Hongfeng, and boyfriend of forensic doctor Gao Yanan.Lively personality, informal, likes to tease, and has strong skills.Because he is wanted as a murder suspect, he can only live in darkness during the day. When night falls, he switches identities with his brother Guan Hongfeng, who suffers from “Night Night phobia”, and appears in front of everyone.