Then match the cards. First, choose 20 cards. 1 to 10 cards are red and black. Wash the cards and fold them. Let's say the numbers and colors in our hearts first. Remember that they are only 1 to 10. Then we touch the cards, show our cards together, find out the numbers we say, and see if the other side also says the numbers in their hands! It would be interesting if someone quoted the same number! The game is meaningless without rewards and punishments. Then give some rewards to the right people. As for the reward, you can decide for yourself! Because the numbers in 20 cards are not easy to match! So give some rewards to the right people!