Mandibular angle shaping projects include long curve mandibular angle osteotomy, mandibular angle osteotomy, square mandibular angle osteotomy with smaller mandibular angle, mandibular angle shaping, chin padding, chin pouting, maxillary protrusion correction, maxillary protrusion correction and so on. Long curve mandibular angle osteotomy first designed the surgical osteotomy line with a special endoscope, then directly saw the bone contour line, and then started from above the angled mandibular angle to below the vertical line of the corners of the mouth.