Yao Chong, born Yao Yuanchong, known 700s–713 by the courtesy name Yuanzhi, formally Duke Wenxian of Liang, was an official of the Chinese Tang dynasty and Wu Zetian's Wu Zhou dynasty, serving as chancellor under four sovereigns—Wu Zetian, her sons Emperor Zhongzong and Emperor Ruizong, and her grandson Emperor Xuanzong. Wikipedia