Chin Na (Qinna) is a subset of many different CMA's. Some people teach it as a seperate art when talking about it, but it was just one aspect of the whole art. Kind of like "Dim Mak", some people teach it as something seperate, but it used to be a small part of the whole art.
So, in an of itself if you removed all of the punching/kicking aspects of Hapkido and were only teaching the joint locking techniques pulled from the art than you would have the Korean equivalent of Chin Na.