Introduction to the First Line Sky: About 1 km away from Zhangshiyan Village, it is one of the main attractions leading to Yuantong Temple. The skyline of Zhangshiyan Scenic Area is formed by steep walls into a long and narrow staircase. When you look up at the sky, you can only see the cliffs pressing together to form a slit of more than 50 meters high. The staircase is 150 meters long.