Even "They" Have Fled

In that instant, Lu Feng's body swayed weakly from side to side.

It was just a moment ago that he had declared his confidence in his lessons, but then these fellows said that they would like to withdraw from his tutelage. 

Must you really slap my face like that?

Suppressing his overwhelming rage, School Head Lu asked hoarsely, "Why?"

One of the students hesitated for a moment before speaking. "Reporting to teacher, after listening to Zhang shi's lecture, we feel like we have squandered the past few years of our lives learning pill forging. Thus, we hope that you can let us go! Even though we are withdrawing from your tutelage, you will forever be our teacher in our hearts. We will never show the slightest disrespect to you!"

If there's no comparison, there's no damage.