I have to disagree with the previous reviewer - this film is c**p.
It was meant to be Jackie's first starring role, but midway through the filming the director and producer disappeared with what was left off the cash, and the project was abandoned. Then, when Jackie became a star, another crafty producer unearthed the reels, hired a "double" to add extra scenes - including the final fight, where the double fights blindfolded to avoid recognition as a double - plus using out-takes (possibly even "takes) from other Jackie Chan films (?Drunken Master), and released it as a "new" Jackie Chan film.
The film is incoherent, continuity is conspicuous by it's absence, the final fight is awful, and if it wasn't for the hints a young Jackie Chan gives of future potential (the fight around a mast on a boat is quite good, and the way he uses props to fight with on that occasion shows which way his mind is working) I'd give this film no stars at all.
Even he's disowned it as terrible (read his bio, very good).
Shouldn't bother. Get Drunken Master and Young Master (extended version) instead.