Is guessing someone else’s last name a trick you often see on the street? The first time I saw this, I thought it was a scam. It’s so easy to earn three yuan at a time. This game is actually the same as the number guessing game. Measuring your fingers is just a cover. He guesses the last name by cards, not by pinching his fingers out of thin air. To put it simply, it means fortune telling. A rectangular plastic sheet is spread on the ground. The layout is 5*3 large grids. Each grid has 30 surnames. The total number is 450. surname. In addition, he held a stack of cards in his hand, with densely packed surnames written on them. From these cards, you find the card with your last name, then find the big box with your last name on the cloth on the ground, and put that card upside down in the corresponding big box. The secret is that each card has The fortune teller only needs to remember which surname overlaps with each card when placed in different positions, and the fortune teller can know the surname of the person being counted. These are people who have gone through certain training.