C81 Listen to the Lecture(1)

The hour of lectures soon passed, and to their dismay, the problem they had expected to solve today was not solved.

"I'm just that close. It seems that I need to come again tomorrow to figure it out!"

"Me too. As long as I can figure out this problem, I will be able to break through to the intermediate stage of the Hou Tian realm. Unfortunately, I still have to wait for another day