Li Chongjun

He was made crown prince because the only son of his father's wife Empress Wei, Li Chongrun, had been killed before his father's return to the throne, but on account of his mother's low birth, he was often humiliated by Empress Wei's daughter Li Guo'er the Princess Anle and her husband Wu Chongxun (武崇訓).

He created Li Chongjun the Prince of Wei and made him the prefect of Luo Prefecture (洛州, i.e., Luoyang).

His staff members Yao Ting (姚珽) and Ping Zhenshen (平貞慎) did frequently advise him to act properly, and Li Chongjun treated them with respect, but could not carry out their suggestions.

At that time, Wu Chongxun's father Wu Sansi the Prince of Dejing was a lover of Empress Wei and a trusted advisor to Emperor Zhongzong, and shortly after Li Chongjun was created crown prince, he persuaded Li Chongjun to suggest that five officials who had been instrumental in returning Emperor Zhongzong to the throne but who had subsequently lost out to Wu Sansi in a power struggle -- Jing Hui, Huan Yanfan, Zhang Jianzhi, Yuan Shuji, and Cui Xuanwei—be killed and their clans be slaughtered.

They then attacked the palace, seeking to arrest Empress Wei, Li Guo'er, and Emperor Zhongzong's concubine Consort Shangguan Wan'er (who also had an affair with Wu Sansi).

The imperial guards at the palace defended against the attack, and Li Chongjun hesitated—hoping to be able to converse with Emperor Zhongzong himself to plead his case.

Li Chongjun's consort was Lady Yang; her younger sister Empress Yuanxian was mother of the future Emperor Suzong of Tang.