Surgery is divided into several specialties; Some are based on the parts of the human body, such as abdominal surgery and chest surgery; Some follow the human body system, such as orthopedics, urology, neurosurgery and vascular surgery; Some are based on the age characteristics of patients, such as pediatrics and geriatric surgery, and some are based on surgical methods, such as reconstruction surgery, microsurgery and transplantation; Others are based on the nature of the disease, such as tumor surgery and emergency surgery. Especially due to the scope of the operation.