C312 Decades of dialogue

None of them!

Xu Qingmo and Yue Ling looked at each other. They had already checked every nook and cranny, there were no switches, and no tunnels …

"I won't." Xu Qingmo shook his head, "There must be a mechanism, but the way we searched it was wrong."

After saying that, Xu Qingmo walked to the side of the wall and looked at the glowing Night Stone embedded in the wall