The Iron Dragon Strikes Back

Li plays a kung fu teacher who, while scuba diving with some students, discovers a cache of gold bars. The gold bars are emblazoned with “666″. Li advises his buddies to drop the gold back into the lake, as it could mean trouble; perhaps this gold was left here for someone else to pick up. Of course, Li’s right, but feisty student Ah Kune goes back on his own and gets the bars. The crooked businessman whom was the gold’s original recipient sends waves of henchmen out to find who’s taken the gold, and so begins one of the most noirish and brutal kung fu films of the 1970s.
(Source: TMDB)