C115 Study tunnel

As he walked into the inner room, Zhuo Qingyan was still trying to popularize him.

"It's not like there aren't such valuable objects that can reflect the rainbow-colored light. It's a type of ore called a crystal, which normally grows in large pieces in deep underground caves. That's because the geologic elements are different and the result is …"

"Is it easy to find?" Chu Yi Chen said