TCT is a liquid-based cytology test, which involves scraping some exfoliated cells from the cervix with a special brush, putting the brush with the exfoliated cells into a special container with cell preservation solution, filtering out impurities with a special instrument, leaving only the cervical exfoliated cells on the slide, and reading the results by professionals. If the cells are not taken at the site of the lesion at the time of sampling, the lesion cannot be detected. If the cells are not transferred to the slide when the cells are transferred to the slide, the lesion will also not be detected. If the specimen obtained from the cervix has too much mucus and blood, the instrument cannot remove the impurities and cover the lesioned cells, and the lesioned cells cannot be detected. The process of manual examination is time-consuming and laborious, and there is also a risk of misdiagnosis. Therefore, a normal TCT cannot rule out cervical cancer. To rule out cervical cancer, we also need to check whether there is HPV infection, and further check colposcopy, which can directly observe whether there are lesions in the cervix, in addition to cervical segmental scraping, pathological examination is the gold standard for diagnosing cervical cancer, so to rule out cervical cancer, we also need negative pathological results.