Fan Yanguang
In 936, Shi Jingtang, with military support from Khitan Empire's Emperor Taizong, overthrew then-ruling Later Tang emperor Li Congke and established his own state of Later Jin. Shi made Zhang Yanze the prefect of Cao Prefecture (曹州, in modern Heze, Shandong). Zhang later served under Yang Guangyuan against Fan Yanguang when Fan rebelled against Shi, and, for Zhang's accomplishments during the campaign against Fan, he was made the military governor of Zhenguo Circuit (鎮國, headquartered in modern Weinan, Shaanxi), and later was moved to Zhangyi Circuit (彰義, headquartered in modern Pingliang, Gansu).