After the fall of Wu Zetian, Ruizong gradually came to power, what role did Li Longji play in this?
In 705, Wu Zetian was overthrown in a coup d'état, and Li Longji's uncle Li Xi'en (note that he was different from Li Guangshun, Li Shouli, and Li Shouyi's father), who was then crown prince (Li Dan had already acquired this title) He was given the title of prince in 698, who had been emperor before Li Dan and had returned to the throne (as Emperor Zhongzong). Li Longji was appointed as the Young Secretary of The Guards. In 708, he was appointed secretary general of Lu Prefecture (潞州, roughly modern-day Changzhi, Shanxi).

In 710, he was recalled to the capital Chang'an. At the same time, the shamans hired by Emperor Zhongzong believed that in the Chang'an area, where Li Longji and his uncle were located, there was an aura of an emperor, and Emperor Zhongzong tried to achieve this vision by visiting Li Longji's mansion and attending a feast. When Li Longji returned to Chang'an, he took the time to establish relations with the Commander of the Imperial Guard, because he believed that Emperor Zhongzong's powerful wife Wei Jin would bring harm to the Tang Dynasty.
In the summer of 710, Emperor Zhongzong died suddenly, and traditional historians believe that lady Wei and her daughter Princess Li Guo'er Anqi were poisoned and died, so much so that Empress Wei could become "emperor" like Wu Zetian and Li Guo'er and become crown princesses.
Emperor Zhongzong's concubine Li Wenmao was the Prince of Wen and was known as the Emperor (Emperor), but Empress Wei retained the power of empress dowager and regent. It turned out that members of empress dowager Wei's clan, Zong Qing, Li Guo'er's husband Wu Yanxiu, and other officials Zhao Lüwen and Ye Jingneng, among others, suggested that she continue to ascend the throne, just as Wu Zetian did, and they also suggested that she eliminate Li Dan and Princess Taiping. Leak their plans to Lee Longji. Li Longji responded by conspiring with Princess Taiping, princess Taiping's son Xue Chongjian (薛崇簡), as well as some low-ranking officials approaching him, Zhong Shaojing, Wang Chong page (Wang Chongye), Liu Youqiu, and Ma Sizong to take action first. Meanwhile, Lady Wei's nephews Wei Bo (Wei Song) and Gao Song (who had recently been commanded by the Royal Guards and tried to establish their authority by severely cracking down on the guards) alienated the guards, and subsequently, Ge Fushun, Chen Xuanli, Li Xianfu, and others joined the plot.
Without prior notice to Li Dan, the conspirators rose to prominence on 21 July and first killed Wei Bo, Gao, and Wei Gui (Wei Xuan), Wei Bo, Gao, and Wei Gui (Wei Xuan), The Cousin of Lady Wei. Then they attacked the palace. When the Empress Dowager fled in panic to a Royal Guard camp, a soldier beheaded her. Li Guo'er, Wu Yanxiu and the Helov people were also killed. Li Longji soon killed some officials in the Empress Dowager's faction as well as her family, while displaying the corpse of empress dowager in the street. At the urging of Princess Taiping, Li Longji, and her younger brother Li Chengqi, Li Dan soon seized the throne from Li Chongmao and became emperor again (ru Ruizong).
In fact, in the editor's opinion, the entire Tang Dynasty is from the establishment, after about 100 years of recuperation and gradual development stage, and finally in the Kaiyuan year to push their national strength to the peak, then there is now what we know about the number one of the two prosperous dynasties, Li Longji He is indeed a very talented figure, whether in the political military or in other fields, the display is a very outstanding talent, and it is also the longest reign in the entire history. It is through his entire Tang Dynasty that it will become more prosperous, but it is precisely because his entire Tang Dynasty will gradually decline, Li Longji is indeed a very legendary figure, I believe that in the whole long river of history, no other emperor can be richer than his experience, life is more dramatic.