Cui Yin
Late in 900, the eunuchs Liu Jishu, Wang Zhongxian (), Wang Yanfan (), and Xue Qiwo (), in reaction to Emperor Zhaozong's killing several eunuchs and ladies in waiting in an alcohol-driven rage, forced him to abdicate to Li Yu. When this occurred, Zhang Jun went to meet Zhang Quanyi the military governor of Youguo Circuit (佑國, headquartered in modern Luoyang) to urge him to start a campaign to restore Emperor Zhaozong, and Zhang Jun further wrote to many circuit governors urging the same. (However, early in 901, the Shence Army officers Sun Dezhao (), Dong Yanbi (), and Zhou Chenghui (), at the urging of the chancellor Cui Yin, made a surprise countercoup, killing the eunuchs who removed Emperor Zhaozong and restoring him, without further military campaign by the military governors.)