C1651 The Last Herb

"Thank you very much." Yang Xuan took the invitation letter from Qii Shanliang and thanked him.

The Ancient Book River Diagram was a treasure that had been passed down since the ancient era. It was said that it had a vast space, mountains, rivers, and all kinds of rare and unusual creatures.

This treasure had only appeared a few times, but its preciousness had long been known by the world