Eventually, I received the welcome notice from NSC today, after many many efforts during the process.
Here, I have some questions, what is the ADIT process? Do I really need to do anything before I can receive my card??
See the welcome letter
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Application Type: I485 , APPLICATION TO REGISTER PERMANENT RESIDENCE OR TO ADJUST STATUS
Current Status: Notice mailed welcoming the new permanent resident.
On March 28, 2007, we mailed you a notice that we had registered this customer's new permanent resident status. Please follow any instructions on the notice. Your new permanent resident card should be mailed within 60 days following this registration or after you complete any ADIT processing referred to in the welcome notice, whichever is later. If you move before you get your new card call customer service. You can also receive automatic e-mail updates as we process your case. Just follow the link below to register.
If you have questions or concerns about your application or the case status results listed above, or if you have not received a decision from USCIS within the current processing time listed*, please contact USCIS Customer Service at (800) 375-5283.
*Current processing times can be found on the USCIS website at www.uscis.gov under Case Status & Processing Dates.
*** Please do not respond to this e-mail message.
Sincerely,
The U.S. Citizenship and Immigration Services (USCIS)