C1010 Small Box

Qu Ye opened the small box. Ye Ling was completely engrossed in what kind of item it was that everyone would fight over it.

"This is it."

Qu Ye took out a piece of paper from the box. Upon closer inspection, the piece of paper had turned slightly yellow and had been folded into four pieces.

"What is this?"

"This is the research results of others back then. I've placed it here, and in the end