There is no definite answer as to whether chemotherapy is needed after 6 sessions of chemotherapy. It needs to be evaluated according to the condition, patient’s physical condition, tolerance level, treatment efficacy, etc. and cannot be generalized. Types of chemotherapy include radical chemotherapy, adjuvant chemotherapy, neoadjuvant chemotherapy and palliative chemotherapy. 1. Radical chemotherapy: some tumors can be cured by chemotherapy, such as pediatric acute lymphoblastic leukemia, choriocarcinoma and malignant vitiligo, etc., which should be given as soon as possible with sufficient amount, intensity and course of chemotherapy, and should not prolong the intervals arbitrarily, and the cycle of chemotherapy is different in different cases. 2. Adjuvant chemotherapy: after local surgery, there may be micro metastasis of cancer cells, adjuvant chemotherapy is the chemotherapy to prevent recurrence, generally there are prescribed courses of treatment and chemotherapy protocols, and the course of treatment ranges from 4 to 8. 3. Neoadjuvant chemotherapy: before surgery or radiotherapy, chemotherapy is used to make the local tumor shrink, so as to reduce the resection scope and maximize the quality of patients’ survival in the future, generally 2~6 cycles of chemotherapy may be needed. 4. Palliative chemotherapy: palliative chemotherapy cannot achieve the purpose of curing the tumor, and does not pursue complete treatment during the treatment period, it should take into account the relationship between patients’ adverse reactions and quality of life, and focuses on relieving patients’ uncomfortable symptoms and improving the quality of survival, generally there is no fixed duration of chemotherapy. Whether chemotherapy is needed after 6 times of chemotherapy depends on the specific condition, etc. It is recommended to consult the attending doctor and follow the doctor’s instruction.