Sun: The so-called targeted therapy means that anti-tumor drugs are targeted on different specific parts of the tumor, thus killing tumor cells and having little effect on normal tissues. This is the most ideal treatment mode at present. Our major cancer treatment centers and specialized hospitals in China can detect some targets of breast cancer, such as ER/PR, HER2 receptor and TP/DPD enzyme, and carry out targeted treatment according to the detection results. This kind of treatment is personalized and the effect is usually satisfactory. Moreover, due to the continuous emergence of a new generation of drugs, while effective treatment, the adverse reactions to patients have also been greatly improved.