It is a kind of needling method formed by single needles and formed in a certain geometric form. It can produce many effects. Adding bean needles on it can form another pattern. Each fourth needle passes through the fourth pin point of the first one, pulling it in the opposite direction, thus forming a small hole. Like the first and second sketches, turn the patterns back, so that the 4 needles in the opposite direction go through the same point. If the tension is right, a small hole can be formed. Embroidering it on light fabrics can decorate women's underwear.