Quote Originally Posted by Krotoan View Post
Yes. You can take your friends or just someone who needs them to all the currents. Fun fact: in Yanxia you can fly THROUGH the barrier with someone who hasn't completed that part of the story yet and get them all the points on the other side.
All aether currents are located in the southern part of Yanxia though. You can unlock flying during your first visit there. Getting carried through the barrier only lets you access the aetheryte on that side earlier.