Uncle Long walked at the front, and this time he seemed much more reliable.
The entrance to the secret passage was amidst a dense forest at the foot of the mountain.
The entrance was a narrow cave, but once you crawled in, you found that there was more than met the eye inside.
Zhang Yang looked around carefully and said in some surprise, "This cave mouth doesn't seem natural; this passage inside, although it appears rough, must have been artificially mined."
Uncle Long nodded and then shared his conjecture.
"I suspect that this might be a mining tunnel inside, but I don't understand why they apparently abandoned it halfway through."
"At the time, I accidentally discovered that the rock wall deep inside this mine had already collapsed."
"That's exactly why it accidentally connected with the secret passage inside that hidden stone cave on Changbai Mountain."
"I've been here once, but it was perilous inside, so I didn't dare venture deeply."
