李承乾
However, the honored position of the Du clan did not last long. Later in 643, Du He was implicated in a plot with Li Chengqian to overthrow Emperor Taizong (as Li Chengqian, who had by then lost Emperor Taizong's favor, was fearful that Emperor Taizong would depose him and replace him with his brother Li Tai the Prince of Wei). Du He was executed, while Du Gou was exiled.