Introduction to the city wall of Chuzhou Prefecture: The city wall is dry-built with stones in an oblique grid shape, filled with sand, gravel and rubble. The battlements are built with bricks. The remaining height of the stone part is about 5 meters, and the widest part is 5 meters. , with dual functions of defense and flood control. The Dongtian Tower is built along the hillside, with buildings built on top and pedestrians on the bottom.