Empress Chang in the Northern Wei Dynasty

By the help of his guardian Empress Chang,Tuo-ba Rui successed as the fourth emperor in the Northern Wei Dynasty.Due to that,controls over Tuo-ba Rui and his imperial power by the empress have gradually tightened.Empress Chang solved two problems during the late Tuo-ba Tao period,one is power struggle by father and son,the other is the dispute by Confucianism and Buddhism.She played an important role in court politics,because she helped to bring about a peaceful time in the Northern Wei Dynasty,meanwhile,she overturns a new traditional practice,that is,empress gave audience behind a screen and raced for power with emperor.