Rivals of the Dragon (1980)

Master Chan (Jeffrey Chan) is a widely respected martial arts teacher who has several skilled understudies in the Los Angeles area. When one of his students takes part in some shady dealings, Chan becomes unknowingly involved in the situation after a group of gangsters mistakenly point the finger at him for the crime. As Chan works to clear his name with the hoodlums, he also manages to reunite with his estranged son (Yeun Tak).