C1313 The first size of the demon subduing army

Long Fei looked at the lake's surface and sighed. "There's no need for that, I already know the situation at the bottom of the lake."

"Ah?" You already know? " Zhao Guozhu subconsciously asked.

He really couldn't understand, just how did Long Fei know about this, and how did he know how to calculate it? If he could