C18 Purple Dream Stone(2)

The rocks on the wall in front of him were rough and uneven. Only one of the rocks had a smooth surface, as if it was frequently touched by someone.

"Strange, this piece of rock has clearly become so smooth and flat after being frequently touched by other people. If that's the case …"

Thinking to this point, Jiang Shan's eyes lit up because he had already thought of the most important point