Introduction to the drinking manger: The drinking manger is also called the horse drinking pool. It is a water tank dug on a large bluestone. It is divided into a movable water tank and a fixed water tank. It is specially designed to provide a drinking water source for horses. The drinking manger is usually located next to a post road with no water source. During drought, the post management staff or local people carry water and pour it into the drinking manger. When it rains, rainwater is stored to solve the problem. The bluestone pavement in Shu Road is generally 2-3 meters wide. The widest point reaches 5 meters.