The West of the pass was located on a plateau, the East was Jue Jian, the South was Qin Mountains, the North was blocked by the Yellow River, and the pass was in the middle of a Valley. It was as dangerous as a Han Valley Pass, hence its name. It was one of the earliest fortresses in the history of China.
As soon as Xia ping 'an opened his eyes, he found himself standing on the impregnable pass, facing the east and looking into the distance. The pass stretched for several miles from east to west, but the ancient road leading to the pass was only about two meters wide, which could only allow one carriage to pass through. On the pass Road, there was an endless stream of people passing through, a long line of hundreds of meters long. Many soldiers in cloth armor were standing on both sides of the pass and the pass with long Spears in their hands, guarding the pass and checking the passing carriages.
