C781 You Are Teaching Me How to Do Things

Lin Hao, who had snuck into the underground tunnel on the other side, had been walking along the trail for more than ten minutes. However, the path was rugged, and there seemed to be no end to it.

Suddenly, Lin Hao stopped walking and looked at a mark on the wall that had been cut by a knife. He frowned.

This was the mark he had made using the village rain when he had just come down the tunnel