Breast cancer is the most common malignant tumor among women, with 1.2 million people suffering from breast cancer each year and 500,000 people losing their lives because of it, and it is the first malignant tumor among women in urban areas and the second in rural areas. Breast cancer affects 1 in 10 American women in their lifetime. Change one principle, surgery-based comprehensive treatment, change to effective treatment method-based comprehensive treatment. Change from maximum tolerated treatment to minimum effective treatment.