[He knows that it is true. That he will be happy with Lan Wangji even after he returns. He told the whole world his feelings so he is sure that no one will be able to stop them when they return. But it makes him sad still to think that he will forget all about the time he has spent with both Lan Wangji's in this place.]

I know..And I want Lan Zhan to be happy too. And I know we all will be because we will have each other and our families back home..But that doesn't mean I don't want to still try and make sure everyone gets to leave.

[The way this world works is a puzzle and Wei Wuxian is determined to solve it.]