Lung cancer patients generally need chemotherapy 4~8 times, the specific treatment plan should be chosen according to the specific condition and personal physical condition, there is no such thing as “the best”, please follow the doctor’s instruction and standardize the treatment. For lung cancer patients, if chemotherapy is applied prophylactically after surgery to prevent postoperative recurrence or metastasis, chemotherapy is generally required 4~6 times. However, if patients with advanced lung cancer have no way to undergo surgery, chemotherapy can be the main treatment, and the course of chemotherapy may take 6-8 times. There is also a part of patients who, after receiving chemotherapy, also need to have maintenance treatment of single-drug chemotherapy, which usually requires maintenance treatment for 1~2 years, depending on the patient’s physical condition. It is recommended that patients actively communicate with the attending physician and follow the doctor’s instructions to standardize the treatment; generally the doctor will choose the chemotherapy regimen according to the patient’s tumor type, clinical staging, and physical condition.