张易之
In 698, after Wu Zetian had, at the encouragement of the chancellors Di Renjie, Wang Fangqing, and Wang Jishan, as well as her close associate Ji Xu and lovers Zhang Yizhi and Zhang Changzong, recalled Li Zhe from exile, Li Dan offered to yield the crown prince position to Li Zhe. Wu Zetian agreed and created Li Zhe crown prince (changing his name initially back to Li Xian and then Wu Xian) and Li Dan the Prince of Xiang.