Advice from a certain cat [Contains a Mary Sue setting, it's a trap, don't poke it if you don't like it, cherish your life and enter the trap with caution]
What to do if one day you and your classmates collectively time travel in class?
First, you have to clarify your settings. The settings are too complicated and will be discussed later.
Secondly, you have to connect with your classmates. Do you want a secret code?
Then, you must have the heart not to be soy sauce, but you must not be too arrogant, otherwise you will become cannon fodder. At the same time, we should not have too much involvement with people from other worlds.
Finally, and most importantly, you have to know your way back.
The above are the [Laws of Complete Survival in Different Worlds]. If you violate them, you will be responsible for the consequences.
However, there was one naughty kid who couldn't wait to wear it without hearing the last word.
Light the wax silently.
[Ps: This article is about time travel, but it is not a myth or an ancient saying. It is actually the product of kneading many elements together... The setting is confusing, and be careful when entering the trap]