C79 Xu lang's new name

Seeing that Xu Lang had agreed, Zhang Yu Bo was extremely pleased. To him, any three questions could trouble Xu Lang, but he did not believe that he, a special treatment professor, would not be able to deal with a student who does not listen properly in class.

Zhang Yubo, who had already won, casually asked the first question. He slowly said, "Okay, let me give you the simplest question