"Tsk, tsk," he tuts. "Now, now, Hanguang-Jun. If one must spend time in an unknown land, they should at least make efforts into learning and acclimating and blending in the best they can! Sampling the foods and culture, visiting new and interesting places, meeting and getting to know its people. There's much to do!"

In other words, he fully expects (wishes for, more so) Lan Wangji to at least do his part! He should know how to to use the communication components, if at least something might happen to Wei Wuxian and he needs to ask around.

"You heard it, too, right?" His expression becomes quite a bit more playful. "This place requires touching, if you want to get by. ♥" Nudge nudge, wink wink.