Introduction to the Dongtian Plank Road: One of the wonders of Baiyun Mountain is its Dongtian Plank Road. Baiyun Mountain is high up in the sky, with the abyss below. It's so high and dangerous that it's terrifying to look at. In 1992, the people of Song County manually dug this 800-meter-long cave-to-sky plank road based on the original cave. The plank road is divided into five sections, with a viewing platform in the middle, where you can have a panoramic view of the infinite beauty.