called IIO today, got EAC number
I called VSC this morning, talked to a very nice lady. She told me my receipt have mailed on Aug. 14, and she gave me the EAC number of my 485, EAD, AP. She told me VSC is currently process June 20th for EAD and July 1 for AP.
I also asked her about the AC21, she told me it based on RD not ND.