I said I would time

After half a minute, Lin Xing panted and ran into the classroom. She let out a sigh of relief, then laughed: "It's okay, it's okay, I almost missed class.",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.,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”。