Introduction to Shenwei Building: It is located on the west side of Shuiguan. The walls around the building are built with blue bricks and white mortar to the eaves and rafters. There is an arrow window in the middle of the outer wall on the back. It is not only a window for ventilation and lighting, but also a lookout hole for observing the enemy's situation. It is also a place for firing bows, arrows, cannons and guns at the enemy. There are two thunder stone holes under the arrow window, which are specially used to launch thunder stones to attack the enemies that invade downstairs. The arrow holes and thunder stone holes are arranged in a glyph shape. The structure of the east and west walls is the same as that of the outer wall. Inside the building is a simple arch, with a stone plaque inscribed with three characters "Shenwei Tower" in regular script on the upper door forehead. There is a shadow wall built on the wall opposite the ticket, with a Xumizuo underneath and a tablet inlaid with a memorial tablet.