Breast hyperplasia grading and color Doppler mammography grading are the same: Grade 0 indicates incomplete assessment and requires further confirmation; Grade 1 is a negative result, meaning only the normal structure of the breast; Grade 2 are benign findings, indicating benign signs such as breast hyperplasia, breast cysts, and breast lipomas; Grade 3 refers to benign findings but with a 2% malignancy rate, such as fibroadenomas of the breast; Grade 4 is suspiciously malignant and biopsy is recommended; Grade 5 suggests a high likelihood of malignancy; Grade 6 is clearly malignant, needing pathological confirmation of malignancy.