He could meet with his colleague Li Ping and perhaps save her.
He could also leave a message for his past self, making him as overpowered as if he were cheating.
Just like in the novels, being the protagonist with a future diary, advancing with cheats all along the way.
But unfortunately,
really going back to the past, he's afraid that aside from changing what he wants to change about himself, he would have to live as if he "didn't exist."
"You have to know, Little Brother, there's a long interval between the first and second rounds of the defense mode. If you go back to the very first point in time, you might have to wait a long time. After all, you've been in the Land of No Light for almost half a year."
Zhou Baiyu had of course considered this possibility.
But hearing Sister Lin say it out loud suddenly made him a bit nervous.
If he really went back to the beginning of the first defense mode, would he actually patiently wait until the second round of defense mode began?