He is a criminal police officer carrying out a mission to arrest the culprit.,Before he travelled through time, he was in charge of a case involving the theft of cultural relics. He had some understanding of history and knew that Sun Fugua was demoted to the Ministry of Punishment in the fifth year of Zhenguan due to a wrongful conviction.,He couldn't see the back of his head, so he came to the railing and turned around to say to the jailer, "Could you please take a look at the back of my head"。