Continuity: When the gunman is first revealed in Chen's apartment, Tang Lung beats the guy all over, but never hits his face. Later when the gunman is being chewed out, he's shown with a bandaged forehead, two bruised cheeks and a black eye.
Continuity: The position of Tang Lung and the restaurant workers when they are standing at the boss's office door.
Continuity: In an early fight scene at the restaurant, one of the protection racket heavies shapes up to Lee's character. He's seen apathetically in a boxing stance of sorts. When Lee performs a roundhouse kick, the scene (from behind the 'thug') clearly shows him with his arms behind his back and hands near/on his hips so that the kick is delivered unchallenged. He then clearly waves his arms forward from that position to up in the air, which creates a more dramatic effect as to the power of the kick, i.e. knocking him that far off balance.