C2201 This is a tree?

Is this a tree?

Finally, Dugu Hong sat down. His actions caused the few people who had been resting with their eyes closed to open their eyes. Still, they made no sound. Previously, because they did not dare disturb Dugu Hong's train of thought, they closed their eyes to rest. Now, since Dugu Hong did not open his mouth to speak, it was naturally inconvenient for them to speak.

"I already know