If anything Lan Xichen is more worried than before - he can tell when his little brother is stonewalling him, but why would that be necessary with the creation of a new piece of spiritual music? He can't imagine someone would be bullying Wangji - certainly no one in Cloud Recesses would want to, or even dare. They have no visiting disciples at the moment, so...

"So if it isn't your music that is the problem, what is?" The best way to find an answer, after all, is to ask the question.

Over and over and over again, if your asking the question of a stubborn younger brother.