As the administrator explained the rules, Wei Huo checked the two shafts and the two black ropes. The two shafts were very hard and technologically advanced, but the two black ropes were stronger.
Wei Huo touched a black rope with his hand and felt as if he was touching a glass surface. The black rope was very smooth and straight. Wei Huo knocked it lightly, but it did not shake at all.
He understood at that moment. This was a black rope made of materials with an asymptotically zero friction force. The wheel would not make any sound when it slid on the rope. As long as a slight force was exerted on the wheel, it would move forward without end until it hit the pole on another platform.
This meant that if someone slid over from the other end of the black rope, it would be difficult for the person on the other end to discover them.
