The birads of the breast are graded into six levels: level 0 requires further evaluation with other imaging, such as mammography or MRI; level 1 is negative, with no positive clinical signs and no abnormal ultrasound images; level 2 is a relatively certain benign lesion, which basically excludes the possibility of malignancy; level 3 may be a benign lesion, and a short-term review is recommended, usually 3-6 months; Grade 4A is a suspicious malignant lesion, and grade 4 is divided into 4A, 4B and 4C. 4A is more likely to be benign and is a fibroadenoma of the breast or an intraductal lesion of the nipple with overflow or blood, with a malignancy rate of 10%-30%, 4B tends to be malignant, with a malignancy rate of 30%-60%, and 4C suggests a higher possibility of malignancy, with a malignancy compliance rate of 60%-94%; Grade 5 , which is highly suspicious of malignancy and should be taken for appropriate diagnosis and management, with a malignancy compliance rate greater than 95%; Grade 6 is malignancy that has been confirmed by pathology.