Hehe, the one upstairs is a national paper, only a math paper. I'll help the landlord find it, but now the internet speed is slow, I can't open the webpage, and the telecom is broken! ! !

When you find it at night, you will sort it out and send it to the landlord. Please accept it when you receive it. ...

PS: It originally belonged to the landlord on the second floor, and now it's sent to you, 7544. ...............................................................................................................................................

Kindness and satisfaction, please accept it! ! ! ! ! ! ! ! ! !