The landlord's situation should go to a professional plastic surgery hospital for oral correction or bimaxillary surgery, and the specific surgery needs to go to the hospital for film examination to determine. In South Korea, the cost of protruding mouth surgery is 50,000-80,000 RMB, and that of double jaw surgery is 9- 1 1 10,000 RMB. It takes 80- 12 months for teeth to be corrected by braces after operation.