As they moved forward, Zhao Hai was silently calculating the time in the dark. He was thinking about how far he had walked. The final result shocked him.
They had been walking for about four hours since they entered the cave, and they had been using Qinggong at full speed the entire time. This speed was definitely not slower than a galloping horse, and might even be faster.
Even though they were advancing at such a high speed, they did not stop at all. Zhao Hai calculated how far they had gone. If they were to walk in a straight line, they would probably be a few thousand miles away.
They were deep underground. Although they didn't go straight underground, it was still shocking that they had gone so far.
However, it was clear that they had not reached the end yet. Zhao Hai had no idea how far they had to go. It seemed that the underground world was really far from the surface.
