Jade Buddha Hall: the pavilion in front is called "Changsheng hall". You can see that on Liang Fang and Dou Gong, there are green Xuan Zi colored paintings. Because there is a jade Buddha in the hall, it is also called "Jade Buddha Hall", and the name of the hall is engraved on the plaque in both Manchu and Chinese characters. The roofs of Changsheng hall and the front gate are all covered with blue glazed tiles. There are strict regulations on the color of the roof of the royal palace. The tombs of emperors and queens are all covered with yellow glazed tiles; The imperial concubines, princes, princes and princesses are covered with green glazed tiles; Only the temple of heaven is covered with blue glazed tiles. We use blue tiles to cover the roof, not only enjoying the emperor's dignity, but also showing the solemnity of "the unity of heaven and man"! Look at the kisses on the main ridge and the running animals on the fork ridge, both of which have the style of palace architecture. The "longevity hall" was originally the place of worship for the royal family of the Tang Dynasty. Here, the desire and wish of "heaven and earth" to pursue immortality are quoted