 Wang Ling lost faith in Cao Fang's ability to rule after Sima Yi's coup d'etat in the incident at Gaoping Tombs succeeded in turning the emperor against Sima Yi's rival, Cao Shuang.As a result, Wang Ling conspired to replace emperor Cao Fang with his uncle Cao Biao.The conspiracy suffered a setback, however, when Linghu Yu died of an illness.