Indications 1.Age >3 years old, the best age is 6 to 12 years old. 2.Moderate or severe symmetrical funnel chest deformity, CT index > 3.2. 3.Pulmonary function tests suggest restrictive or obstructive airway pathology, susceptible to upper respiratory tract infection, reduced tolerance to strenuous activity, shortness of breath when running or climbing stairs. Shenzhen Yun, Department of Thoracic and Cardiovascular Surgery, Aviation General Hospital of China Medical University 4. 5.People who failed in other surgical methods. 6.Adolescents who have serious psychological burden and require correction of appearance.