Hong Kong Film: I Praise Myself so Much, but I Really Don't Want to Be an Undercover Agent

Traveling back to the world of Hong Kong movies in the early 1980s, how could a time traveler work as an undercover agent? Of course it means being a policeman comfortably. Jianghu is not about fighting and killing, it must be about humaneness and sophistication. But the same applies to the police Chen Fei: I started as an undercover agent, and with my backhand I let everyone know what it means to rise in a crazy era. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.