C138 Water Curtain Cave
After thinking for a long time, Su Kuang finally lowered his eyes and looked at Zhou Yan. He said, "The air here is very fresh. It's definitely not possible for the air to be sealed. The entrance we entered just now was too small, so it's impossible for the air to be so dense here. Zhou Yan, what do you think this place is?"
Su Kuang's eyes were gloomy