The Unmatchable Match

Fung yue tung lo is a movie starring Stephen Chow, Michael Wai-Man Chan, and Vivian Chow. Ruthless gangster Guts pulls off a heist of diamonds, then enlists the aid of longtime triad member, Fei, to arrange a buyer for them. But...
Chow is an undercover cop who must befriend former triad kingpin Chan Wai-Man to investigate a brutal diamond heist. It turns out that Chan is innocent of the theft, but not of the fencing of the stolen goods