Wu Chengsi
In 689, Empress Dowager made Wu Chengsi "Nayan" (納言) -- the head of examination bureau of government and a post considered one for a chancellor. In 690, she made him "Wenchang Zuo Xiang" (文昌左相) -- one of the heads of the executive bureau of government, also considered a post for a chancellor. Around the same time, he had Zhou falsely accuse Emperor Gaozong's sons by other consorts, Li Shangjin (李上金) the Prince of Ze and Li Sujie the prince of Xu, of treason. Empress Dowager Wu summoned Li Shangjin and Li Sujie to Luoyang and had Li Sujie strangled; Li Shangjin committed suicide.