The gap in their memories is a little overwhelming. But it is not completely unexpected. Even when Xingchen had been here...he had come from way before as well.

"I wouldn't say it was good. I was whisked away just before my death. My future is now only on this train."

Which he has accepted in a way. He doesn't look forward to going home to his death. And it is okay. He has had some fun moments here too.

"I'm a few years ahead of you in the story of our lives." A playful joke considering they are in a library.