Dr. Zhang Zhonghai pointed out that in addition to the details of life that need attention in daily life, such as healthy diet, regular work and rest, staying away from alcohol and tobacco, breastfeeding and ionizing radiation, the most important thing is self-examination and physical examination. Some studies have said that oral endocrine therapy drugs for breast cancer and other drugs with certain anticancer effects, such as aspirin, have certain preventive effects on breast cancer, but there is no conclusion at present and they have not been applied in clinic.