Hogwarts: Chinese Professor

Li Wei, Chinese.
Enrolled Hogwarts in 1971 and graduated from Slytherin College.
Fourteen years after graduating from Hogwarts, he was suspected of "the spread and proliferation of dark magic" and after successively defeating nine Aurors sent by the British Ministry of Magic to arrest him.
He was approached by Dumbledore himself and forced to become the new Defense Against the Dark Arts professor.
"First graders, Professor Huo Qi, who is in charge of flying lessons, told me that she feels not feeling well today, so the two flying lessons this afternoon are all changed to Defense Against the Dark Arts.
Likewise for the third graders, Professor Trelawney, who is in charge of divination, senses that her fortune is not very good this month and is not suitable for teaching.
In the next month, you will not need to take divination classes again. Please keep this in mind and be sure not to leave then.错教室。”
“NO！！！！！！！！！！！”
“吵什么吵什么？”
“看看你们自己的样子吧，咒语不精，施法无力，反应迟钝，注意力松散，没一个能力是像样的。
连最基础的魔力掌控都做不好，还妄想着偷懒耍滑么？”
讲台桌上，李维面色如水，冷冰冰地吐出了那句杀死课堂的话语。
"You are truly the worst class of students I have ever taught."
......