C289 Big Chu Crisis

Qin Yuan's attention was more focused on the unknown crystal. He picked up the crystal box and asked, "Could it be that you've already analyzed its use?"

Mu Xinyan walked to the bookshelf in the workshop and picked out a book that was as thick as two fingers. She flipped it open in front of Qin Yuan, "This is the record of my research on this crystal. Let's not talk about the details