According to the authoritative experts of Jun Gao Beauty Hospital, the big face can be sharpened by mandibular angle plastic surgery, that is, the facial skin and muscles are cut from the inside of the mouth near the mandibular angle, and the muscles are separated from the periosteum to expose the bone parts that need surgery, and the osteotomy line is drawn according to the designed bone cutting amount; Use a swing saw with a long handle to cut the mandibular angle according to the osteotomy line, and smooth the edges and corners after osteotomy.