The teacher walked up to the podium with a serious face and turned on the projector. Then, he slowly said: Everyone knows that Covid-19 has everyone on edge, and I've heard that most New York universities have taken advantage of spring break to temporarily suspend classes. Although we haven't received any official notification from the school yet, I want everyone to be prepared.

Ding.

The big screen in the classroom shows that the teacher has received a new email, and immediately afterwards, you notice that a new email is also displayed on your phone. You and your teacher open the email at the same time, and it says：