Introduction to "One Line of Sky": "One Line of Sky" is the most difficult section of climbing Jiaozi Mountain. Looking up or down, the stairs are almost vertical, and the 760 steps will climb to an altitude of 3987 meters. However, beautiful scenery always lies in dangerous places. When people look back at the mountains, the magnificent scenery instantly appears in front of them, and the vastness shows the majesty of the steep mountains.