[Lan Wangji jerks his head in a short nod. he realizes belatedly that he hasn't yet introduced himself to this man, which was unpardonably rude of him, when he thinks about it.]

Both.

[he hasn't been carrying his sword and qin as regularly, up till now, but now that he has his core back he'll keep them both close -- and the sword at least will further answer Felix's question for him when he spots it. in the meantime...]

...

Courtesy name Lan Wangji.