She is the daughter of Yang, a minister of the Ministry of Finance. She entered Chang 'an with her uncle Yang Xuanyan and married Li Yao, the 14th son of Emperor Xuanzong of the Tang Dynasty. Li Longji later took a fancy to it. Li wanted to keep Yang for himself, but because of her birthright, she was asked to leave the palace and become a female Taoist. Then she returned to the palace and stole the clock. Li Longji worked hard in his early years and gradually relaxed in his later years. After Yang Yuhuan, he indulged in debauchery and neglected state affairs. On the other hand, Yang Yuhuan was not only favored by herself, but also honored as a senior imperial concubine, and her relatives followed suit. My cousin, Yang Weicheng, Yang Guan, is the Lord protector, the elder sister is Mrs. Han, the third sister is Mrs. Guo and the eighth sister is Mrs. Qin. As The Song of Eternal Sorrow says, "Brothers and sisters are traitors because she illuminates and glorifies her family so much."
In the late Tianbao period, there were many contradictions in the court, and the love for the Yang family further aggravated the contradictions. In the 14th year of Tianbao (755), armed to the teeth, An Lushan rebelled, attacked Yang, stood aside and arrived in Chang 'an ... Li Longji and Yang Yuhuan fled to Sichuan together. When they arrived at Mawei Post in Shaanxi Province, the squire challenged the imperial army and asked Yang's brother and sister to thank the world. Forced by the situation, Li Longji had to demand that "Gao Lishi be ordered to slap the imperial concubine under the pear tree in front of the Buddhist temple". (Li Zhao's Supplement to National History)