Yiwu tongue strap is cut from scratch. The position of the top of the head should start from the midline on both sides of the triangle, divide vertically forward until it sweeps backwards. The position of the cheek starts from the midline through the eyes, extends laterally downward from both sides of the ear, and bends into a T-shaped line. The most important thing about the chin is to keep the proportion of the face, generally starting from the middle position of the chin and going down to the end of the chin.