By rule, your five-card hand must always be worth more than your two-card hand. The cards that are dealt are the cards you have to play.
There is no draw pile or discard pile in Pai Gow Poker. One of your hands has five cards, while the other hand has two cards, for a total of seven cards. Unlike Blackjack, however, in Pai Gow you play two hands of cards at the same time. In Pai Gow poker, you play cards against a dealer, as you would in card games like Blackjack. All the card games on are for amusement and brain training only.