Zhang Yue (Tang dynasty)

Zhang Yue () (663–730), courtesy name Daoji (道濟) or Yuezhi (說之), formally Duke Wenzhen of Yan (燕文貞公), was an official of the Chinese Tang dynasty and Wu Zetian's Zhou dynasty, serving as a chancellor three separate stints during the reigns of Emperor Ruizong and Emperor Xuanzong. He is known for having suggested the transition of Tang central government armed forces from being conscription-based to recruitment-based, and for turning the office of the chancellor into a specialized post with strong executive powers.