回複:Can two pending I-485 from EB1b and NIW be relinked or not? 兩
It doesn't help any when transferring PD, at least at the present time when EB-1 is always current.
BTW, the example you mentioned is I-485 transfer not PD transfer.
http://blog.wenxuecity.com/blogview.php?date=200802&postID=19212#PDtransfer