The drama "Shuangbi" in Qing Dynasty refers to Kong's Peach Blossom Fan and Hong Sheng's Palace of Eternal Life.
Kong is the most famous dramatist in the early Qing Dynasty. After more than ten years of hard work, he changed his manuscript three times and wrote the legendary drama Peach Blossom Fan. Peach Blossom Fan has been widely circulated since its publication. After performing on the stage, it was favored by people. "Peach Blossom Fan" is based on the clue that a talented person in Ming Dynasty met Li, a Qinhuai geisha, on the way to establish a "Fuxing Society" in the south of the Yangtze River, and they fell in love and presented a poem fan. Soon, he was framed by Ruan Dacheng, a confidant of Wei Zhongxian, and forced Li to betroth her to others. Li Ning refused to give up, so she bumped her head against the post and tried to commit suicide. Blood immediately flowed to the poem fan that Hou Fangyu gave her. Hou Fangyu's friend Yang Longyou drew a peach blossom on the fan with blood. This drama is people's loyal praise for love, and at the same time reveals the dark reality of society.
The Palace of Eternal Life is a play written by Hong Sheng, a playwright in the early Qing Dynasty. The theme is taken from the famous poet Bai Juyi's long poem Song of Eternal Sorrow and the playwright Bai Pu's Wu Tongyu in the Yuan Dynasty. The Palace of Eternal Life tells the beautiful story of eternal love between Emperor Xuanzong of the Tang Dynasty and Yang Yuhuan. It greatly supplemented the social and political contents of the Xuanzong period in the Tang Dynasty and made up for the shortcomings of Wu Tongyu. In addition, Hong Sheng changed the theme from Song of Eternal Sorrow to Eternal Life, which is also a very big breakthrough. In Bai Juyi's Song of Eternal Sorrow and Bai Pu's Wu Tongyu, although they also highly praised Li Yang's love, they were more sympathetic to their life and death, so they were called "Song of Eternal Sorrow". Hong Sheng thinks their love is earth-shattering and praiseworthy. Even in where will you go, love will never die, so it is called "immortality".
Among many operas in the Qing Dynasty, these two operas are called "two treasures" because of their highest ideological and artistic achievements.