President of China Qin and Han History Research Association, member of the Sixth Discipline Appraisal Group of the State Council Academic Degree Committee, director of China Social History Society, director of China Great Wall Society, director of China Yanhuang Culture Research Association, director of China Heluo Culture Research Association, member of academic committee of Peking University China Ancient History Research Center, adjunct professor of Peking University History Department, adjunct professor of Luoyang University, Xianyang Normal University, Northeast Culture Research Institute of Jilin Normal University and School of History, Culture and Tourism of Xuzhou Normal University. Full-time off-campus researcher of Qilu Cultural Research Center of Shandong Normal University, member of expert committee of China Literature Museum, editor of Historical Monthly and guest editor of Journal of Xianyang Normal University.