What's the name of the first line of the Aerial Forest Trail?

The first route of the natural barrier plank road aerial forest trail is named "natural barrier plank road" because it is located in the deep mountain canyon of Zhashui County, Yan 'an City, Shaanxi Province. The trail is built on a cliff, with a high height and a steep environment. The builder of this plank road conformed to the terrain and built it according to the mountain situation. The mountains are green and lush, showing the magnificent landscape and rich ecological environment of the virgin forest along the way. At the same time, this plank road has a natural terrain.