Tian Chengsi
However, some officials were inaugurated by emperors who seek to curry favor through such a move. This was due to the weakening of imperial authority after the An Lushan Rebellion. Such officials include enunchs like Yu Chaoen and Cheng Yuanzhen, and generals like Tian Chengsi who helped usher in the era of fanzhen which became largely autonomous and defied control by the imperial court.