The "Sage of Love" has been recognized by the world since ancient times as Li Longji, Emperor Xuanzong of the Tang Dynasty. He was the deity worshiped by opera troupes and brothels in the old days. September 8 - May 3, 762), reigned from 712 to 756. The longest reigning emperor of the Tang Dynasty, the third son of Tang Ruizong Li Dan, his mother was Concubine Dou De. The temple name is "Xuanzong", and because of his posthumous title of "The Great Sage, the Great Ming Xiao Emperor", he is also called the Emperor Ming of the Tang Dynasty. In order to avoid the taboo of Emperor Kangxi's name "Xuan Ye" in the Qing Dynasty, he was often referred to as Emperor Tang Ming, and he was also titled "Emperor Kaiyuan Shengwen Shenwu".
Li Longji was born in Luoyang, the eastern capital, in August of the first year of Chuigong (685). He was wise and decisive by nature, versatile, knew music, was good at calligraphy, and had a majestic and handsome appearance. In the Yongchang period (689), he was adopted as the heir to Li Dan's eldest brother, Emperor Xiaojing Li Hong, who was first named King of Linzi, and later changed to King of Chu and also served as Luzhou Biejia.