回複：Processing Time

By read the following, I believe it is RD, instead of ND.

"The processing dates shown below represent the receipt dates of petitions and applications currently being processed by the USCIS Service Center. If the receipt date shown on your receipt notice is prior to the processing date shown below, you may call USCIS Customer Service at 1-800-375-5283. We encourage you to check this page periodically before inquiring about your case. The processing dates are updated monthly."