It's different. Anterior introversion is aimed at the width of zygomatic bone, while posterior introversion is aimed at the width of zygomatic arch. According to different situations, different schemes are designed to reduce the face without destroying the three-dimensional sense of the face. Zygomatic arch osteotomy is performed by cutting from the opposite side of the bone surface with instruments to reduce the peeling area between the frontal bone surface and soft tissue. For those with large inward pushing range or too much soft tissue, the soft tissue in this area can be pulled and fixed at the same time, which can prevent the accumulation of soft tissue caused by too much soft tissue or how far the bone surface moves in the later stage. Mandibular and zygomatic plastic surgery can be performed at the same time.