This is very helpful to me. Thanks again for your reply. Because in my clan, each bead got its name and special function, so I thought every beads in another places should has its name, too. Now I understand my narrow view after reading your insightful ones. There are very poor information about my clan's beads, only chieftain family knows about the beads' matter. And then most of the details had gone after the neglect. And I found something meaningful, maybe I can find out the migration route of my clan, find out where do we come from by the way of matching the same beads.
Any way, thanks again.