The speedboat stopped, and everyone prepared to disembark, only to find the surroundings were very dark!
"Uncle, where is this?"
With a smile, Qin Xiao got off the boat first, then helped each of them down, "This is a cave!"
Once everyone had disembarked, Qin Xiao turned on a flashlight and led everyone inside.
After walking for a while, Qin Xiao suddenly turned off the flashlight. Initially, everyone was unaccustomed to the dim surroundings, but after standing still for a moment, they noticed a slight blue glow in the cave!
Upon closer inspection, the light was emitted from the cave walls. "Uncle, are there lamps installed on the cave walls?"
Qin Xiao shook his head, "No, these lights are emitted by the walls themselves. The rocks here are special. Every night, ultraviolet lamps on the walls are turned on, allowing the walls to absorb the light. By day, these walls emit this kind of blue glow."
