Ren Huan
In 923, Li Cunxu was planning to declare himself emperor of a new Later Tang, and therefore summoned Zhang and the assistant to the military governor of Anyi (安義, i.e., Zhaoyi, changed to Anyi to observe naming taboo for Li Sizhao), Ren Huan, to his presence at Wei Prefecture (魏州, in modern Handan, Hebei). This act caused apprehension in the heart of Li Sizhao's son and successor Li Jitao, who had taken control of the circuit without the approval of Li Cunxu after Li Sizhao's death in battle. As he thought that Li Cunxu summoned Zhang and Ren to prepare to act against him, he thus submitted the circuit to Later Liang's emperor Zhu Zhen.