Hidden weapons in Tangmen is a kind of hidden weapons in Tangmen. It has a wide variety and is mainly used for throwing, such as darts, flying stones, flying needles, flying forks, daggers and sleeve arrows. Prepare a square piece of paper, first fold the diagonal of the paper in half, then turn to the front and fold the diagonal on both sides in half. Then fold both corners in. Turn the side that has just been folded over. Then fold the left corner inward. A flying knife, that's all.