Pai Gow Poker - Hand Rankings

The only two-card hands are one pair and high cards.

Five-card hands use standard poker hand rankings with one exception: in most Nevada casinos, the hand A-2-3-4-5 ranks above a king-high straight, but below the ace-high straight A-K-Q-J-10. At most casinos in California and Michigan this rule doesn't apply; the A-2-3-4-5 is the lowest possible straight.

The joker plays as a bug, that is, in the five-card hand it can be used to complete a straight or flush if possible; otherwise it is an ace. In the two-card hand it always plays as an ace, except in several southern Californian casinos where the joker is completely wild.

From Wikipedia's