Beijing Shengjiarong Facial Sculpture Center uses Huangshu polar HD mandibular angle, a new generation of comfortable osteotomy. It takes about 1 month for the operation to completely reduce swelling. After all, the operation of mandibular angle is done on the face, so it takes longer than the general operation to grind the face and lift the face to reduce swelling. After 2-3 months, the masseter muscle itself will undergo reconstruction atrophy due to the change of attachment position and muscle tension, so the best mandibular angle operation effect will be achieved in about 6 months.