Lan Wangji thought correctly, so he wasn't surprised at the answer, but he was hoping for any more clues.

"They don't know? Really...?" Crossing his arms. It seems the animals don't know much, other than humans are not welcoming in their forest. Which sounds like more of a natural territorial mindest.

With a sigh, "I guess that is all, Wei Ying." If they ask any more questions from the different rodents and residents of the forest, it would probably be the same answer.