Both early and delayed chemotherapy are often bad. If chemotherapy is advanced, although it has better control on the tumor, it will also damage other normal cells in the body, even sometimes it will cause fatal damage, so chemotherapy is often not advanced. If chemotherapy is postponed, although it is good for the recovery of the body, the tumor cells may not be effectively controlled, and even the tumor may recur and progress, so if there are no serious adverse reactions, chemotherapy should not be postponed. Chemotherapy needs to be carried out according to the prescribed chemotherapy time. It is best for the patient when the cancer patient’s body can both recover and the tumor cells do not show growth.