Redis Redis cluster: Is there a way to access to keys that have been migrated to new node when the moving of whole slot has not finished?

As one step moving a slot from one node to another node in redis cluster is migrating all keys in this slot between two nodes. During the data of a slot moving, I found that keys that have migrated also can't be accessed, with an ASK redirection. I wonder if there is any other way to access?

Comment From: trevor211

We can accessed the already migrated keys with a prefix ASKING command while the hosting slot is in half way of its migration.