Wu Chengsi
Just four months later, however, Ge offended Wu Zetian, as there had been a movement led by one Wang Qingzhi (王慶之) to have Wu Zetian's nephew Wu Chengsi made crown prince, displacing Wu Zetian's son Li Dan (formerly emperor until Wu Zetian took the throne in 690). Ge's senior colleague Cen Changqian opposed the movement and advocated that Wang's group of petitioners be disbanded, and Ge supported Cen. In late 691, Ge, Cen, and another chancellor Ouyang Tong were arrested by Wu Zetian's secret police official Lai Junchen and executed.