This was said by a female teacher in her forties dressed with much experience. It seemed like she disliked Lu Mian.
Lu Mian was not angry, but Ding Cai was.
"Ms. Sun, please don't interrupt me when I'm talking to my student."
Who was she scolding?
He could teach his own students however he liked; it was not up to others to intervene.
The female teacher Sun Jiaying's face froze. She was the physics department head and had brought up quite a few students with stellar results. She had seen a lot of stubborn rascals like Lu Mian, and they could not be saved.
She reminded Ding Cai kindly, but she was insulted in return.
"Mr. Ding, I'm only reminding you because you're a young teacher. It's not good if you're so nice to certain students, and they would even think that you're annoying. If you have so much time and effort, why don't you think about the upcoming National Physics Competition."
