In clinical practice, we often encounter breast cancer patients who struggle with the question of whether to preserve the breast or remove it all. People always say, “Doctor, the cleaner you can get it, the better. But what do you mean by clean? It is not the case that the more you take, the cleaner and safer it is. The concept of modern surgery is: the least trauma to get the most effective treatment. The knife is no longer bigger, but smaller, and with better results! It was once thought that the chances of survival were the same with breast conservation and total excision, and patients still had difficulty choosing. As long as the doctor thinks it is possible to preserve the breast, the patient can completely preserve the breast, and stop being swayed by the foolish opinions of the seven aunts and eight grandmothers, because it is your breast that will be cut, not theirs. The leading oncology journal Annals of Oncology published an article online on February 23, 2015, “Survival of Patients with Stage I–III Breast Cancer After Surgical Treatment in the Public Health Care System”. The study showed that for stage II–III breast cancer, breast-conserving surgery (BCS) + radiotherapy was associated with a lower risk of all-cause death and breast cancer-specific death correction than mastectomy.