The number of chemotherapy treatments for cancer, generally 6 times is more common, such as postoperative adjuvant chemotherapy, depending on the patient’s physical condition, it is more common to do 4-6 courses of treatment. Of course, like lymphoma may need more chemotherapy, possibly up to 8-12 times. There are also some malignant tumors that may be staged relatively late and cannot be operated at the beginning, and need to do preoperative neoadjuvant chemotherapy, also need to do at least 4 courses of neoadjuvant chemotherapy, and some need to do 8 courses of neoadjuvant chemotherapy. Generally, after 4 courses of neoadjuvant chemotherapy, a follow-up is needed to evaluate the efficacy of the treatment and to further see if the treatment can be operated. In some advanced malignant tumors, the number of chemotherapy sessions may be more, because it is palliative maintenance chemotherapy, and there is no way to determine the number of sessions, because it can only be used as a side-by-side treatment. There are some malignant tumors of the gastrointestinal tract, such as gastric cancer, which may be treated with 10-20 courses of oral chemotherapy. So for different malignant tumors, you can only look at the treatment and then individualize the medication, and there is no way to determine the exact number of chemotherapy sessions.