C4626 Calculation

Zi Chen felt the strong threat and also guessed their intentions. He remained calm and said, "Sir, I found a strange place underground."

"Where?" the man asked.

"It's a bit cold at the end of a mine tunnel. I don't dare to go in there too deeply, but I tried to throw the torch there. There was a faint reflection of light coming from the torch. It seemed to be a very large crystal