What Lan Wangji is saying is impossible. Impossible that there is a survivor, impossible that he can somehow escape the Cloud Recesses from here, impossible that he would just... go.

But his brother is not a liar. Lan Wangji is many things - an esteemed scholar, a secret romantic, a peerless warrior, a bullheaded mule... but not a liar.

So whatever Lan Xichen might think about these claims, Lan Wangji fully believes that they are true. Believes that there is a Wen child, ill and alone. Believes that he has the power to abandon everything that he has known, and has the will to do it. Lan Xichen must start from there. Even if it all turns out to be delusions of grief later, that will not help the now.

"You want me to declare a Wen child one of our own?"