The screening for cervical lesions is called the three-step screening model, and the details are as follows: 1) first, cervical cytology screening, or TCT, is required, and for those over 30 years of age, additional testing for human papillomavirus, or HPV, is currently recommended; 2) if abnormalities are found, colposcopy is required to assess the extent of cervical lesions by looking at some abnormal epithelium and blood vessels through colposcopy; 3) if problems are found in the cervix, a biopsy is required, which can be performed in a variety of ways, such as multi-point biopsy or microscopic tube scraping, depending on the colposcopic assessment.