One is bone grinding, the other is bone cutting, and the third is three-dimensional osteotomy. These methods often need to be used together to achieve the purpose of comprehensive dressing change. Simple bone grinding and bone cutting are suitable for the anterolateral protrusion of the face, that is, the zygomatic bone that is designed and removed before operation is chiseled thin with special instruments, thus reducing the external contour of the face and improving the face shape.