Lan Xichen might not come to the stables that often but he knew that if Wei Wuxian was around they'd hear the sound of the dizi. The man had mentioned something about playing for the horses. Even though he, himself, was not fond of the ghost flute due to its nature he trusted the man behind it. Not that it had always been that way, it hadn't been. There was a time where he did not trust Master Wei with Wangji's heart.
He gives a soft hum of his own," Are there any paths that you know Master Wei to take in order to get here, Wangji?" It was a tad bit earlier, but he would think that Wei Wuxian would be there on time. Same with Jiang Wanyin. The two did enjoy their work.
However, perhaps they should check any other entrances to the stables as well.