Chinese character face plastic surgery: hypertrophy mandibular angle plastic surgery: the ascending branch of mandibular margin is too long, resulting in an angle less than 120, which is seriously at right angles. By cutting off too many "angles", the angle can be returned to 120, and the curve is smooth. The operation time is short. Face-lifting surgery for hypertrophy of mandibular angle: mainly aimed at hypertrophy of mandible, the ascending branch of mandibular angle (exoskeleton) is removed to make the front of mandible look sharp and thin, with face-lifting effect and smooth face.