After pushing the wall open, Old Sir Zhong did not hurry to enter; instead, he turned around to find a book for Wan Chu'er from the bookshelf.
"Here, this book introduces some mechanical techniques commonly used by espionage agents around the world. Take it and have a look," he said, pulling out a yellowing book from the shelf.
Wan Chu'er quickly glanced at the black hole created by the pushed open wall, hurried over to take the book, and exclaimed joyfully, "I love it."
"I've almost searched through our entire school's library, how come I've never seen a similar book?"
Old Sir Zhong hummed softly, "You can't find this stuff outside; if you weren't my granddaughter, you'd never get to see it in your lifetime."
Wan Chu'er blinked, realizing it was a private stash.
Old Sir Zhong said, "Alright, let's go in and take a look."
