Cao Shuang
On 5 February 249, Jiang Ji joined Sima Yi, Cao Shuang's co-regent, in staging a "coup d'état" against Cao Shuang when Cao Shuang was away with Cao Fang on a visit to the Gaoping Tombs (). After Sima Yi and his supporters seized control of the imperial capital Luoyang, Jiang Ji accompanied them as they led their troops to the floating bridge above the Luo River outside Luoyang. There, Sima Yi sent a memorial to Cao Fang, listing out Cao Shuang's "crimes" (e.g., not fulfilling his duty as regent, corrupting the government) and requesting the emperor to remove Cao Shuang and his brothers from their positions of power. Cao Shuang ultimately surrendered and relinquished his powers as regent to Sima Yi. On 9 February 249, a powerless Cao Shuang, along with his family, his supporters and their families, were rounded up and executed on charges of treason.