 After his father's death, his mother brought him to the Kowloon Walled City to start a new life.Wanting to provide his mother with a better life, he becomes an underground Muay Thai boxer to earn prize money, and also impresses triad boss Or Man-cheung, later becoming his right-hand man(as revealed in episode 14, Fu killed Or Man-Cheung's previous right-hand man).His mother dislikes Fu's decision of joining the triads and they have a falling-out.