The number of chemotherapy sessions does not necessarily have to be four; the number of chemotherapy sessions is determined by the patient based on the condition, the nature of the tumor, and the choice of treatment. Chemotherapy is a kind of chemical drug treatment, which needs to be regulated according to the course of treatment. One chemotherapy session may be able to kill some of the cancer cells, but if the drugs are not applied consistently, the number of cancer cells will still grow over time, so chemotherapy needs to be administered periodically, with varying numbers of chemotherapy sessions. Some chemotherapy-intolerant patients who receive chemotherapy may experience significant side effects and need to stop chemotherapy and choose other treatments, as well as undergo regular follow-up. Chemotherapy may produce adverse reactions, the number of chemotherapy needs to be based on medical advice and their own condition to decide, it is recommended that under the guidance of the doctor to consult the treatment.