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.,He once also wanted to try suicide to see if it could activate this ability, but ultimately he gave up after hesitating for a long time because he was afraid that the ability wouldn't work after suicide, and what if he really died,"Without the school bell, did they adjust the class time..."。