Walking through several Grand Canyons in different places, Zhangye Pingshan Lake Grand Canyon is the most challenging walk. You need to walk a lot of ladder plank roads. You have to take the adventure road to watch the first line of sky at the bottom of the valley. Finally, you have to climb two vertical steel stairs with your bare hands to return to the top of the valley (the iron ladder can't see the top from the bottom up, But this ladder is a shortcut from the bottom of the valley to the top), and after arriving at the top, I suddenly felt that the two arms were inexplicably stiff, which should be caused by tension [screaming teeth]. Because there is no choice to take an off-road vehicle, camel car, and ride a camel 🐫 These three sections, so I saw half of the attractions less, but it also took 4 hours, and the amount of exercise was just 👍