After Wu Zetian's death, Tang Zhongzong was restored, and Empress Wei held real power. Empress Wei colluded with Wu Sansi, Wu Zetian's nephew, to control the dynasty.

After the death of Tang Zhongzong, Li Longji (the son of Tang Ruizong) launched an army to destroy the party after Wei and supported Tang Ruizong's restoration.

Two years later, Emperor Ruizong of the Tang Dynasty relinquished the throne to Li Longji.

On September 9, 712 (the fourth day of the eighth month of the first year of Tang Xiantian), Li Longji ascended the throne. He was Xuanzong of the Tang Dynasty.

When Emperor Xuanzong of the Tang Dynasty, who was in his 20s, he worked hard to restore and develop Emperor Taizong's career. He appointed Yao Chong and several other famous ministers to rectify the government, bringing the Tang Dynasty to its peak and the emergence of the "Kaiyuan Prosperity".