Zhu Ningsheng, Chief Physician, Professor, Member of Chongqing Breast Cancer Professional Committee of China Anti-cancer Association, Member of National Clinical Cancer Pharmaceutical Cooperation Alliance, Member of Breast Cancer Group of Chongqing Medical Association Oncology Special Committee. Over 30 years’ experience in breast professional clinical work, with specialty in correct judgment and timely treatment to various diagnosis of breast diseases, in-depth research on early diagnosis of breast cancer, sentinel lymph node biopsy, breast sparing radical mastectomy and standardization of breast cancer treatment, and rich experience in clinical theory and practice. Focuses on prevention and treatment of breast cancer, and participated in projects of early diagnosis and treatment of breast cancer screening under the Ministry of Health of the People's Republic of China, as well as researches on other areas under the Chongqing Municipal Health Bureau with academic papers published in domestic journals.