C186

"It shouldn't be." Ning Yuan frowned as he looked at the surrounding walls, "Every tunnel has two heads. Logically speaking, if we come from the other side, we can get out from the other side."

"It's not a question of whether or not there is an exit. It's that we can't find it." Lu Jinfeng also looked a little tired, "Even if it has seven or eight exits, it would be useless if we can't find it