Self-examination: monthly self-examination of breast, chest wall and axillary and supraclavicular lymph nodes, and timely consultation if abnormalities are found. Specialist examination: chest wall for recurrent or metastatic lesions, examination of contralateral breast, bilateral axillary supraclavicular lymph nodes. ultrasound including contralateral breast, bilateral axillary, operative chest wall, bilateral supraclavicular lymph nodes, abdominal organs (kidney, adrenal gland, liver and spleen) and gynecological (uterus, ovaries) examination. Chest X-ray (once a year), chest CT and brain MRI if deemed necessary by the doctor during follow-up Bone ECT scan (once every two years), unless bone metastasis is suspected (e.g., persistent aggravated bone pain that cannot be explained by common disease), timely examination of ECT or MR, and PETCT if available Blood tests: CEA, CA199, CA125, CA153 and other tumor markers; for endocrine therapy Liver function and lipid examination; mammogram: once a year. Breast MRI is recommended after surgery for breast conservation or for those who have prosthesis or autologous tissue reconstruction. Post-operative follow-up is important. Post-operative follow-up for breast cancer: starting from the month of surgery, every three months in the second year after surgery, every six months from the second to the fifth year, and annually thereafter.