C643 It was the fifth shift again?

After a simple introduction, Mu Youqian let the teachers bring the students back to the class to continue their lessons, while Bai Xiaohei and the others followed Mu Youqian back to the office building.

Old De had been following behind Mu Yougan the entire time. Even now, he still could not believe that the black cat in front of him was Xiao Bai