From which ancient opera was Drunkenness of the Imperial Lady adapted?

Drunkenness of the Imperial Lady is adapted from the ancient opera The Palace of Eternal Life. There are fifty plays in the Palace of Eternal Life. The first half wrote the story of Tang Huangming and Yang Guifei, the oath of the Palace of Eternal Life, the Anshi Rebellion, the change of Ma Su, and Yang Guifei died in Huangsha. The second half is mostly taken from unofficial history rumors. After the Anshi Rebellion, Xuanzong missed the imperial concubine and sent people to heaven and earth to look for her soul everywhere. Yang Guifei also deeply missed Tang and repented her sins before her death. Their sincerity touched heaven, and with the help of Weaver Girl, they finally met again in the Moon Palace. Drunkenness of the Imperial Lady, also known as Baihua Pavilion, is a one-fold drama based on the story of Yang Guifei, a historical figure in the Tang Dynasty in China. It is widely known through the creation and performance of Mei Lanfang, a famous Peking Opera performer in China, and is one of the representative plays of Mei School.