Before graduating from university in 2023, Lin Xing had experienced this kind of time travel three times. Judging from these limited three experiences, he believed that the length of time he traveled back to the past should be related to the size of the danger.,"If I could go back a year, there must have been some major disaster. It needs to be reported to the national authorities so they can prepare in advance...",At this moment, the classroom was empty except for Lin Xing. He casually chose a seat and sat down, taking out his books from his bag while continuing to think about his plan.。