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.,"Without the school bell, did they adjust the class time...",The middle-aged man at the head shouted into the earpiece, “What’s going on Why is the entrance different from the previous calculation results”。