Do not set a personalized signature.
You canceled QQ.
You copied him (her).
Give full play to your Tang priest's skill, educate him (her) and let him (her) know that copying other people's personality signatures is a bad behavior!
Call Xifeng to scare him (her)
Accuse him (her) of plagiarism and fail the whole course.
The most important thing is to tell him (her) that you trust Brother Chun! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !