Jin Ling actually seems to want the gift, enough to grind out a bit of gratitude, which has Wei Wuxian stunned for only half a second before he recovers.

"I didn't test it, but it might even make it easier to have a conversation without anything listening in," he suggests. The spirits he and the other Wei Wuxian had questioned with Inquiry couldn't have been very high level, and having a way to pass along messages that weren't being spied upon by the queen's spiritual minions was useful, but most importantly, it could keep Jin Ling safe, should they get into anything dangerous.