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.,A familiar feeling kept swirling in her mind, as if some important memory was trying to resurface. Yet Lin Xing couldn't for the life of her remember what it was.,Just as the classroom was in turmoil, a squad of men in combat gear and armed with firearms were running quickly toward the classroom from outside the teaching building not far away.。