Desc: Chung fung dui: No foh gai tau: Directed by Benny Chan. With Ching Wan Lau, Jordan Chan, Tat-Ming Cheung, Theresa Lee. After assaulting his tactical commander during a raid gone sour, a dedicated but temperamental cop Sergeant Bill Chu is demoted to the Emergency Unit, long considered to be the police force's dumping ground for problem cops.