This game is called “scissor, rock, and cloth” (剪刀，石头，布). You use one hand to represent these three items, as shown in the following pictures:
Cloth can cover rock, rock can break scissor, scissor, of course, can cut cloth. The cyclic functions of these gestures make the game fair. One of the two people can decide who goes first, or who win, by calling out together “one, two, three”, followed immediately by displaying one of these three gestures. One of the two will win, or both have the same gesture, you just repeat again until one wins. Try this with a Chinese, he or she will be surprised that you know this game.