As an adult, Li Xulun is modest and eager to learn, proficient in calligraphy, and has a lot of experience in textual exegesis. Successive right-back generals, Luozhou animal husbandry, named Yu Wang, King Ji and King Xiang, and renamed it. In the second year of Yongchun (683), it was renamed Li Dan and was once again named Yu Wang.
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After Li Longji was made a prince, her political power grew day by day, which became the main obstacle for Princess Taiping to interfere in state affairs. Princess Taiping wanted to make it easier for the prince to maintain his power for a long time, so she spread rumors in the ruling and opposition circles, claiming that Li Longji was not the eldest son of the emperor and was not qualified to be a prince. But because Li Dan publicly announced to quell rumors, she failed.
She also planted eyes and ears around Li Longji, monitored his daily behavior, made friends with Dou Huaizhen and other ministers, and plotted against Li Longji. Later, the contradiction between Princess Taiping and Li Longji gradually became public. She even invited the Prime Minister to stay at the Guangfan Gate of Zheng Xuan Hall, suggesting that they persuade the emperor to change the crown prince, but Song Jing sternly refused.
In August of the first year of congenital (7 12), Li Dan was located in Li Longji, the Prince, and abdicated as the Emperor's Father. However, he still has the right to appoint officials with three or more titles and adjudicate major criminal cases. Every five days, he receives greetings from ministers in the Taiji Hall and still calls himself me. And the emperor can only call himself "Yu"
At that time, relying on Li Dan's trust, Princess Taiping still had a strong influence in North Korea. Five of the seven prime ministers came from her door, and most officials were attached to her. She publicly proposed to abolish the emperor, but failed because of the opposition of Prime Minister Lu Xiangxian. Later, Li Dan planned to send Emperor Li Longji to Beijing to inspect the border, but it was postponed for some reason and the date was changed to August next year.
Baidu Encyclopedia-Li Longji