C43 Mysterious map

"What is this?" Why are there pieces of paper? " Doubts started to arise in Tie Xiao Jun's mind, but time was of the essence, and Tie Xiao Jun did not have the time to see what they were, so after a moment of shock, he placed the paper and stone into his storage bag, and rushed into the portal.

After everyone had entered, the class monitor also entered.

Following that