There are many types of major diseases, such as acute myocardial infarction, cerebral infarction, hemophilia, and chronic granulocytic leukemia, childhood leukemia, uremia, and many oncological diseases, such as breast cancer, cervical cancer, lung cancer, stomach cancer, esophageal cancer, colon cancer, rectal cancer, and so on. In surgery, it mainly includes tumor diseases such as stomach cancer, colon cancer, rectal cancer, liver cancer, pancreatic cancer, gallbladder cancer, etc. The prognosis of patients after treatment may be relatively poor, and the national reimbursement rate for major diseases is much higher than that for normal diseases.