Hogwarts: A Chinese-Style Professor

Li Wei is Chinese.
He entered Hogwarts in 1971 and graduated from Slytherin House.
Fourteen years after graduating from Hogwarts, he was accused of "spreading and proliferating dark magic" and defeated nine Aurors sent by the British Ministry of Magic to arrest him.
He was personally approached by Dumbledore and forced to become the new Defense Against the Dark Arts professor.
"First-year students, Professor Hooch, who is in charge of the flight class, told me that she is not feeling well today, so both flight classes this afternoon will be replaced with Defense Against the Dark Arts."
Similarly, in the third year, Professor Trelawney, who was in charge of divination, sensed that her luck was not good this month and that she was not suitable to teach.
For the next month, you will not need to attend any more divination classes. Please remember this and make sure you don't go to the wrong classroom.
"NO!!!!!!!!!!!"
"What's the fuss about?"
"Look at yourselves! Your spells are poor, your magic is weak, your reactions are slow, your attention is scattered, and none of your abilities are decent."
"You can't even handle the most basic magic control, yet you're dreaming of slacking off and being lazy?"
On the lectern, Li Wei, his face ashen, coldly uttered the words that would kill the class.
"You are truly the worst class of students I have ever taught."
......

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