He had continuous classes.
After the first period, there would be a 10-minute break in the middle, and the next class would still be this one.
After Assistant Professor Yang had finished the two classes, he packed up his teaching materials and went straight to Principal Mu's office.
"Is Principal Mu here?" He went to ask his assistant.
The assistant saw his angry look and did not dare to dally at all. He immediately said, "Yes, please wait a moment."
The assistant quickly went to knock on the principal's door.
"Mr. Principal, Assistant Professor Yang is here to see you," the assistant said at the door and winked at Principal Mu, trying to let him know that Assistant Professor Yang was in a bad mood.
He did not know if Principal Mu had understood, but the latter replied enthusiastically, "Quickly let Mr. Yang in."
