Whether a breast cancer patient should undergo chemotherapy after surgery needs to be judged according to the patient’s pathological type. Generally speaking, in situ cancers without metastasis do not require chemotherapy, while most invasive cancers require chemotherapy. Only a small percentage of invasive cancers can be treated without chemotherapy. The following conditions need to be met: 1. LuminalA type: ki67＜15%, tumor diameter less than 2cm, histological grade I or II, no metastasis in axillary lymph nodes, age more than 35 years old; 2. Other types of breast cancer: no metastasis in axillary lymph nodes, tumor less than 0.5cm. Therefore, whether to carry out chemotherapy needs to be judged according to the patient’s specific situation, no matter which type of No matter what kind of cancer, patients should keep a good attitude and build up confidence to overcome the disease.