The process of chemotherapy is roughly divided into four stages: First, before chemotherapy, the doctor will stage the tumor patient according to all the examination results of the patient and determine whether chemotherapy can be carried out. If the body allows chemotherapy to be carried out, the best chemotherapy regimen will be formulated and the patient and family will be informed of the general process and possible side effects of chemotherapy and sign the informed consent, i.e. chemotherapy consent form. Second, in chemotherapy, the chemotherapy regimen is generally a multi-drug combination, and once the regimen is determined, the start and stop times of various chemotherapy drugs have been determined, and intravenous infusion or/and oral chemotherapy drugs are administered according to the chemotherapy regimen, and the doctor will keep observing the patients’ side effects to chemotherapy. Third, after chemotherapy, the patient will need to stay in the hospital for a few days after the chemotherapy is finished for observation and review the blood routine, liver and kidney function, etc. If there is no obvious abnormality, the patient can be discharged from the hospital. Fourth, outpatient follow-up, because serious chemotherapy side effects, mostly occur 7-10 days after the cessation of chemotherapy, so after discharge, regular outpatient follow-up blood tests and liver and kidney functions, etc., usually 1-2 times a week, if there are abnormalities, to be treated at any time. A chemotherapy treatment is called a cycle, usually 3-4 weeks, but in most chemotherapy regimens, the dosing time is within one week, and the rest of the time is used to observe or/and treat the corresponding side effects. From the first day of chemotherapy, 21-28 days are counted and then you are admitted to the hospital for the second cycle of chemotherapy, which is the whole process of chemotherapy.