Many patients after surgery do not understand very well how to continue to treat their tumors. In terms of tumor classification, there are tumors of important organs such as lung cancer, liver cancer; there are also sub-important organs such as gastric cancer, esophageal cancer, intestinal cancer, breast cancer, bladder cancer, etc. From nowadays, it is customary to choose chemotherapy, but there are rules for choosing chemotherapy, the important point is the pathology of surgery and the process of surgery, if the tumor is simply removed, there is no local erosion and local lymph node metastasis, chemotherapy can be unnecessary, if If there is local erosion and lymph node metastasis, the body is good, and the surgery basically removes the tumor and lymph nodes, then 1-2 times of chemotherapy can be carried out slightly, the time I think can be carried out once after 1 month of surgery, and then once after 6 months, and then once in the first half of every year for 3 years. There is no need to mechanically follow the course of treatment. Because chemotherapy is injurious treatment, and chemotherapy is no satisfactory efficacy for tumor, especially it cannot cure tumor, therefore, in order to protect the patient’s physique to the greatest extent, we have to select and arrange reasonable procedures for the treatment of post-operative patients, and we cannot let patients die of physique failure after chemotherapy.