It was normal for laboratory staff to bring PhD students out of school, but not everyone knew about it. Normally, laboratory staff were needed to go to some 'unspeakable' bases.
Ye Jian didn't know that Yang Heng and the rest had left the school with the members of the electromagnetic laboratory. She only knew that her old friend, whom she hadn't seen for a long time, had left the school at 6:00 am this morning.
Yesterday, Yang Heng told her that he would leave the school at 6:00 am this morning. As for when they would meet again, it was hard to say.
It could be a few years or very soon.
As time passed, her childhood friends were growing older too. No one knew when they would meet again. Yang Heng smiled at Ye Jian and said, "I don't know when we'll meet, but I know that I'll drop by your school to visit you again. I can get in just by showing my ID card."
He was telling the truth.