Desc: Mao tou ying yu xiao fei xiang: Directed by Sammo Kam-Bo Hung. With Ah-To, Billy Chan, Philip Chan, Yim-mui Chan. Two retired thieves are blackmailed into teaching at a local Youth Probation Centre by ex-cop Chung. There, they teach the youngsters the value of self-respect. But their criminal past is never far behind.