Tumor indicators have relative specificity and non-specificity, as follows: 1. Relative specificity includes PSA, which is a specific tumor marker for prostate cancer. If PSA is significantly elevated and the patient has urinary frequency, urinary urgency and painful urination, the possibility of prostate cancer is mostly considered; 2. CA153 is a relatively specific tumor marker for breast cancer, if the patient has hard nodules in the breast and the blood CA153 is significantly elevated, the possibility of breast cancer is highly suspected; 3. CA125, if the patient has abdominal distension, abdominal fluid and the blood CA125 is significantly elevated If the patient has a long-term history of hepatitis and blood AFP is significantly elevated, greater than 400, the possibility of primary liver cancer is highly suspected; non-specific tumor markers, such as carcinoembryonic antigen, CY211, etc.