Introduction to the Stone Arch Bridge: Prince Zhuang’s Mansion is composed of three four-way palace-style courtyards and a south garden. From south to north, they are the screen wall, the stone archway, the Chinese watch, the stone arch bridge, the Yudai River, the mansion gate, the flower room, the dressing room, and the theater. Building, platform, Yin'an Hall, temple, east and west side halls, wing rooms and corridors, etc.