Cancer patients should decide which items to be examined according to the location of the cancer, for example, the following: 1. Other routine blood tests, liver and kidney functions and tumor indicators can also be checked. 2. In case of cancer of gastrointestinal tract, in addition to routine imaging and hematological tests, endoscopy, i.e. gastroscopy, colonoscopy and gastrointestinal imaging, can also be performed; because other imaging tests cannot replace endoscopy. Therefore, the cancer review program needs to be decided according to the location of the cancer.