C413 Causal cycle

"Zhang Yu, aren't you going to rest for a while?" At this moment, Bai Hua's voice came from behind me, and I could hear that her voice still carried a trace of sleepiness.

I just so happened that Bai Hua had woken up. Thus, I hastily passed the booklet that my father had left for me to her and said, "If you don't want to continue sleeping, then quickly take a look at this