Ou Jian, director of Gynecological Oncology Surgery, Resigned from the clinical work of gynecological radiotherapy in Jilin Cancer Hospital and joined the Guowen Medical corporation Changchun hospital. She specializes in precision radiotherapy for gynecological tumors, three-dimensional afterloading and three-dimensional brachytherapy, chemotherapy for gynecological malignant tumors, molecular targeted therapy and individualized comprehensive therapy. She is especially good at MRI-guided brachytherapy for gynecological malignant tumors. Compared with the traditional CT-guided brachytherapy, it has the advantages of higher tumor treatment accuracy and lower side effects, which is at the advanced level at home and abroad.