Colleague relationship. Qi Lin, male, first-class chief physician, professor, doctoral supervisor, doctor of medicine, postdoctoral fellow in the United States, national famous urology expert, director of urology department of Xiangya Hospital, academic leader of national key clinical disciplines, Fan Qi, male, professor, 1968 graduated from the Seventh Military Medical University of China People's Liberation Army, 1992 served as director and organ of urology department of Xiangya Hospital,