Su Muge walked to the last row of bookshelves and found a book as thick as the palm of his hand in an inconspicuous corner.

The cover of the book looks old and the pages are yellowed.

When Jinglan walked in, Su Muge was looking through the book in his hand seriously.

"Mumu, what are you looking at?" Jinglan approached curiously.

Su Muge raised his head from the book, closed the book and shook it in front of Jinglan. "Uncle, where did you get this book?"

Jinglan ...