walking on The east line of Tianmen Mountain - Biye Yaotai, walking along the plank road, the scenery feels better than the west line. At the point where the east line glass plank road passes, there are two points where you can overlook Tianmen Cave, because it is looking down to the north. , so it is called “Looking down at the sky from the north” Gate, when I first saw the north, I looked down at the Tianmen, but I couldn’t see everything. After walking for a while, when I saw the north, I looked down at the Tianmen. The angle was much better, and I could see the ladder to heaven. There are 999 steps, paved straight down. From this angle, I had a good view. A small feeling of mountains.