Nowadays, breast cancer has become a common and frequent disease. The survival rate of patients with middle and late stage breast cancer is related to the stage of the disease: 1. The survival rate of stage I breast cancer is over 90%-95%; 2. The survival rate of stage II breast cancer is 70%-80%; 3. The survival rate of stage III breast cancer is 50%-60%; 4. The survival rate of stage IV breast cancer is less than 10%. The survival rate of early stage breast cancer is high and the survival rate of late stage is low, so early detection, early diagnosis and early treatment.