Jiankou Great Wall (Arrow Nock) is one of the most dangerous and wild Great Wall sections. It is also the most photographed section due to its precipitous mountains, unique construction style, and attractive scenery; It zigzags 12 miles (20 kilometers) from the Ox Horn Edge Wall to the Nine-Eye Tower via the Beijing Knot, joining Mutianyu in the east and Huanghuacheng in the west. this hike-through route is from Zhengbei Tower of JianKou at XiZhaZi Village. It is also the largest and the most complete watchtower along this section. The gentler path on the east leads to the Ox Horn Edge Wall, the east end of this section, and joint with mutianyu section.