According to experts, the method of shortening the long face is mostly chin grinding surgery. There are two ways to grind chin: bone cutting, chin pulling out or chin prosthesis implantation. Among them, the implantation of mental prosthesis is simple and easy to be accepted by patients. The doctor will first choose the chin prosthesis suitable for the patient, put it into the chin through the mouth under local anesthesia, and then complete it after determining the position. The urgency of the operation is very small, and it will take about four or five days to fully recover. Because the incision is in the mouth, there is no trace on the appearance.