Two Toothless Tigers (1980)

Director: Ricky Lau Koon-Wai
Cast: Samo Hung, Johnny Wang, Chung Fat, Yuen Shun-Yi

Samo Hung plays the uncle of a hapless fool who is the doppelganger of an arch criminal, who possess half of a treasure map over the years. Greed has prevented him and his partner in crime from actually finding the treasure, but now it seems that they may be too late, as a third man plots to steal the treasure right out from under them. Enter Samo and his nephew to mix things up even more. Top notch action in the tradition of Magnificent Butcher.