During Emperor Gaozong's reign and Emperors Zhongzong and Ruizong's first reigns
Li Chongrun, then named Li Chongzhao, was born in 682, to then-Crown Prince Li Zhe and Li Zhe's wife Crown Princess Wei. Shortly after Li Chongzhao's birth, Li Zhe's father Emperor Gaozong created Li Chongzhao the unprecedented title of Deputy Crown Prince and gave him a staff. When Emperor Gaozong became ill at the eastern capital Luoyang late in 683, Emperor Gaozong summoned Li Zhe to Luoyang and left the capital Chang'an, where Li Zhe was previously in charge, nominally under Li Chongzhao, but with the chancellorLiu Rengui actually in charge. Later that year, Emperor Gaozong died, and Li Zhe succeeded him, although Li Zhe's mother Empress Wu still had actual power, as empress dowager. In spring 684, after Emperor Zhongzong showed signs of independence, Empress Dowager Wu deposed him and reduced him to the title of Prince of Lulin, replacing him with Li Chongzhao's uncle Li Dan the Prince of Yu. Shortly thereafter, Li Chongzhao was reduced to commoner rank. It is not completely clear, but he appeared to have been exiled with his parents to Jun Prefecture. It might have been around that time that he was renamed to Li Chongrun, to observe naming taboo of Empress Dowager Wu's personal name.
During Wu Zetian's reign
Meanwhile, in 690, Li Chongrun's grandmother Empress Dowager Wu forced his uncle Emperor Ruizong to yield the throne to her, interrupting Tang Dynasty and establishing her own Zhou Dynasty with her as "emperor". In 698, under the advice of the chancellor Di Renjie, she recalled Li Zhe to Luoyang, which had been made capital. Soon thereafter, Li Dan, who had been made crown prince when he yielded the throne, offered to yield the position of crown prince to Li Zhe. Wu Zetian agreed, and created Li Zhe crown prince, changing his personal name to Xian and further changing his surname to Wu. She created Li Chongrun the Prince of Shao. As of 701, in her old age, Wu Zetian had allowed her lovers Zhang Yizhi and Zhang Changzong to handle much of the affairs of state. Li Chongrun was not pleased with this state of affairs, and had discussed the issue with his sister Li Xianhui the Lady Yongtai and her husband Wu Yanji the Prince of Wei. This discussion was somehow leaked, and Zhang Yizhi and Zhang Changzong complained to Wu Zetian. In anger, she ordered that the three of them be forced to commit suicide. It was said that Li Chongrun was handsome, filially pious, and caring for his siblings, and that his death was much mourned by the people. In 705, after Emperor Zhongzong was restored to the throne after a coup, he ordered that Li Chongrun and Li Xianhui be reburied with honors usually only due emperors, near the tomb of Emperor Gaozong. He also posthumously honored Li Chongrun as Crown Prince Yide and Li Xianhui as Princess Yongtai. He had the deceased daughter of the official Pei Cui be posthumously married to Li Chongrun and had her buried with Li Chongrun.
