大牛们给解释一下,希望不是RFE
On March 14, 2013, the 15-day Premium Processing clock stopped on your I140,
IMMIGRANT PETITION FOR ALIEN WORKER. A notice was sent on this date
explaining the specific reason for stopping the premium processing of your
case. This notice will contain detailed information on further action
required by you. Your premium processing receipt notice contains contact
information for direct inquiries on your case.