Introduction to Chengqian Palace: One of the six eastern palaces, originally named Yongning Palace, it served as the residence of concubines in the Ming and Qing dynasties. The famous ones include Concubine Dong E, favored by Emperor Shunzhi of the Qing Dynasty, and the biological mother of Emperor Xianfeng (Emperor Daoguang). Xiaoquan became the queen of Niu Hulu clan).