The difference between 4 and 6 cycles of chemotherapy is based on the specific condition of the tumor, its stage, and the type of pathohistology. Usually, 4 times of postoperative adjuvant chemotherapy treatment is enough for early stage of tumor, when there are poor prognostic factors such as vascular tumor embolism or more metastasis of lymph nodes during operation, then 6 cycles of postoperative chemotherapy treatment can be carried out, and regular review and observation of disease changes, postoperative chemotherapy to improve the effect of chemotherapy. For simple palliative chemotherapy, it is usually difficult to achieve the goal of completely eliminating the residual tumor, and it is necessary to combine with other treatment options, and regular review to observe the changes in the condition. The more often chemotherapy is given, the more adverse reactions it may cause. It is recommended to consult a hospital for a clear diagnosis and treatment, and to be guided by a specialist to improve the prognosis.