Li Chongjun
In 707, after Emperor Zhongzong's son Li Chongjun the Crown Prince, angry over Li Guo'er's repeated attempts to displace him to become crown princess, failed in a rebellion to arrest Empress Wei and Li Guo'er, Li Guo'er and Zong Chuke (now chancellor again) tried to implicate Princess Taiping and Li Dan in Li Chongjun's plot, but after Xiao Zhizhong spoke on their behalf, Emperor Zhongzong stopped investigations against Princess Taiping and Li Dan.