C580 A person blocking the way

"It's alright, this kind of book is something Father no longer cares about." And I'm pretty much done with it. Furthermore, I am not very interested in this book. " Bai Mingyu said that casually.

However, the value of this book could not be measured.

"In addition, I sent you the diagrams you gave me earlier to father. father is very satisfied." Those pictures are enough for the reward