Prof. Yang has been working on the treatment, education and research of obstetrics and gynecology, major in gynecologic oncology for over 30 years. Being a noted expert in the field of gynecology with particular expertise in gynecologic tumors, Prof. Yang has done many works on early diagnosis and treatment for ovarian cancer, chemo-protection of ovarian function for young patients with malignant diseases, reproduction-sparing for early gynecologic malignancy, and cord blood stem cell.  Prof. yang is the recipient of numerous awards, and research support from National Science Foundation.