A card game full of strategy and luck. The game revolves around the number "21". Players compete with the dealer on the same stage. The goal is to make the sum of the points of the cards in their hands as close to 21 as possible, but not exceed this number. In poker, the points of number cards are calculated according to their face value. J, Q, and K are all considered 10 points, and A can be used flexibly as 1 point or 11 points. At the beginning of the game, the player and the dealer each receive two cards. According to the points of the cards in their hands, the player needs to choose "ask for cards" to continue to get new cards to increase the points, or "stop cards" to stop asking for cards to determine the final points; they can also "double" to double the bet but can only ask for one more card. When the points are not ideal, they can also "split cards" to split two cards of the same point into two hands for separate games. When the player's points do not exceed 21 and are greate...