When Yee and Ko Chun are in the hospital, Ko Chun has a large, circular blood stain on his head bandage. But when Knife breaks in, the blood stain is smaller and changes shape.
In the opening scene, Ko appears to play baccarat in a casino in San Francisco whilst other gambling machines are visible. Casino gambling is illegal in most parts of the United States including California. This caption, mentioning San Francisco at the start, is excluded in English language print.
Kam-Shing appears to host a game of five card stud on his yacht but only can on international waters to evade arrest. In between when Ko Chun and his entourage came on board to the commotion following the game, the ship has not appeared to have moved from outside Lantau Island, meaning Kam-Shing has opened himself for arrest. For the ship to be in international waters, it needs to be furtherer away.