The Ancient Three Passes Great Wall

　　The Ancient Three Passes Great Wall: In ancient times called the "Western Pass Wall," it was built in the tenth year of the Jiajing reign (1531), stretching from Daba (now within the territory of Qingtongxia County) to Sanguankou (now west of Yinchuan City), spanning 40 kilometers. The entire wall was constructed using earth rammed in layers and did not have brick cladding on the exterior. Today, most of it remains relatively well-preserved and forms an important part of the world-famous Ming Dynasty Great Wall.