Nel 228, Gongsun Yuan usurpò Gonsun Gong e propose a Cao Ruì di divenire suo vassallo. ###>===Campaigns against Liaodong===The only real military gain for Cao Wei during Cao Rui's reign was the end of the Gongsun clan's hold on Liaodong (modern central and eastern Liaoning), which was started by Gongsun Du in 190.