Cao Mao
Cao Mao then led his forces from the palace, personally wielding sword. Sima Zhao's younger brother Sima Zhou attempted to put up resistance at one of the gates, but was defeated and fled. Sima Zhao's aide Jia Chong led another defense at the South Watchtower. When Cheng Ji (成濟), a military officer under Jia Chong, asked Jia what to do, Jia told him to defend the Sima clan regardless of the consequences. Cheng Ji then approached Cao Mao and killed the emperor with his spear.