A stone fell from its zero hand. It rolled over the steep mountain wall, bounced up and down between a few protruding old rocks, and finally scattered into a cloud of dust in the air.

He leaned against the wall like a gecko and looked up. Following the movements of his hands and feet, his speed was not much slower than a real gecko. In the blink of an eye, he had already reached the top of the mountain. After reaching the top, he looked down the mountain again. Black spots were ...