[Chongyun may or may not mark it, but his obstacle does not seem either surprised or resistant at his rseponse to that follow-up. I will not go this way -- a statement that takes it as a given that he does plan on going there, albeit by a different route.

Lan Wangji couldn't actually expect otherwise. he's been the advance scout on his own share of missions. the best he can do for this youth is to keep him away from one of the approaches that the Kappa see as strategic enough to deliberately set guards on. those will be the ones where he'll be discovered quickest, and retaliated against most forcefully. he might as well say so outright, he thinks.]

You must avoid paths which are guarded.

[...it's not spoken with the air of someone trying to lay out a hint, or sabotage his own sentry mission. the double meaning of his words can either be interpreted or not; it's completely literal advice, whether Chongyun intends to find another way or actually give up here.

in the meantime, Lan Wangji's not going to let him slip away down this guarded path with a transparent excuse, either.]

I will supervise.