Doctors at BK Plastic Surgery Hospital in South Korea said that people with obvious hypertrophy, valgus, Chinese character face or trapezoidal face are suitable for mandibular angle reduction plastic surgery, and those with prominent mandibular angle and asymmetrical sides are suitable for mandibular angle reduction plastic surgery; Mandibular angle reduction surgery is also suitable for cases where the ratio of upper and lower widths of the face is not harmonious and the distance between the two mandibular angles is too wide. Without the above situation, it is not suitable for mandibular angle plastic surgery.