The Incredible Kung Fu Master(1979)

Tung Wei is a lad who wants to learn kung fu. He trains in two different styles: Hung Gar and Wing Chun. Everything is fine until a jealous master creates a rift between Tung's two teachers, and he has to choose sides. But a bigger problem looms ahead. The Tiger Master wants to fight both men to the death. They're no match for him, so Tung goes to the one man who can train him properly: Sammo Hung