Gu Yuan Ancient City Wall, this site stretching across the Huangtu Plateau, from the Ming Dynasty, tells of the turbulent winds of the borderlands. The 1.5 kilometers of remaining ruins resemble a giant dragon coiled, capturing the emerald green Lipan Mountains and the rushing Jing River in its entirety. Climbing to the top allows you to embrace the vast Northwest, the grand mountains and rivers, and it will shake your soul. You can still see arrow slits, battlements, and other military ruins in the rammed earth layers, the weathered rammed earth and blue bricks complement each other, witnessing the iron-blooded courage of the frontier soldiers.