The Palace of Eternal Life, also translated as The Palace of Eternal Youth, is a play written by Hong Sheng in the Qing dynasty. He absorbed certain material from the long narrative poem The Song of Everlasting Sorrow written by Bai Juyi and the zaju Rain on the Paulownia Tree (梧桐雨) written by Bai Renfu. The Palace of Eternal Life is acclaimed as one of China's "Four Great Classical Dramas", along with The Peony Pavilion, The Peach Blossom Fan and Romance of the Western Chamber. The performance is focused on the everlasting love story of Emperor Xuanzong of Tang and his favorite consort Yang Guifei.

Yang Yuhuan, often known as Yang Guifei, and known briefly by the Taoist nun name Taizhen (太真), was the beloved consort of Emperor Xuanzong of Tang during his later years. She is known as one of the Four Beauties of ancient China.