武承嗣
However, what Wu Chengsi wanted to be was crown prince—and emperor in the future. However, Wu Zetian created Li Dan, the former Emperor Ruizong, crown prince (with the unconventional title "Huang Si" (皇嗣)). Wu Chengsi's ally, the official Zhang Jiafu had the commoner Wang Qingzhi (王慶之) organize a group of petitioners, requesting that Wu Chengsi be made crown prince—under the argument that with an emperor from the Wu clan, it would be inappropriate to have a crown prince from the Li clan. The chancellors Cen Changqian and Ge Fuyuan opposed the movement and advocated that the petitioners be rebuked and disbanded—and their advocacy angered Wu Zetian. Cen and Ge were soon arrested by her secret police official Lai Junchen, and soon, they, as well as another chancellor friendly to them, Ouyang Tong, were executed. For a time, it appeared that Wu Zetian would create Wu Chengsi crown prince, as she often received Wang in audience to hear his advocacy for Wu Chengsi's candidacy; however, later, on an occasion when Wang happened to offend Wu Zetian, the chancellor Li Zhaode, who opposed Wu Chengsi, took the opportunity to have Wang battered to death and his group of petitioners disbanded. He then pointed out to Wu Zetian that Li Dan was her son and closer to her than a nephew. He also pointed out that she had received her power from her husband Emperor Gaozong, whose worship would be swept aside if Wu Chengsi were to become emperor. Wu Zetian agreed with his points and for some time did not speak again of making Wu Chengsi crown prince.