Introduction to the One-line Sky: The One-line Sky is formed by typical fissures (joints) and rock collapse. The stone walls on both sides are less than two feet apart and about 20 meters long. Looking up from the line of sky, a 700-year-old red pine tree is attached to the rock wall, named "Songyan Xiangqing". On the rock wall is the inscription "One Line of Sky" written by Comrade Du Xianzhong, the former deputy governor of our province. According to legend, when Pangu created the world, he originally wanted to nail Optimus Prime with his divine axe, but mistakenly used the ax blade to split Optimus Prime in half, resulting in this scene.