Introduction to Xihe Gate: One of the Six Western Palaces, located behind Yangxin Hall. In the Ming Dynasty, it was named Changle Palace and Yude Palace. It was the residence of concubines in the Ming and Qing Dynasties. Because it is close to Qianqing Palace and Yangxin Palace, some emperors once lived here temporarily. In the late Qing Dynasty, it was used as a warehouse to collect imperial artifacts.