请教:I-130被批准，但不能在美境内调整生份，要等NVC

绿卡为配偶申请移民，I-130被批准,but not eligible to file an adjustment of status application … sent the approved petition to Department of State National Visa Center (NVC) …
请问:
1) in what situation is it possible to be determinded "not eligible"?
2) is it helpful asking professional help at this time?
3) what's NVC? usually what's the steps with NVC? typically how long of each step? do we have to go back China to pick up the visa? is an interview required usually?

Thanks for any hints!

所有跟帖： 

• 回复：请教:I-130被批准，但不能在美境内调整生份，要等NVC -Lian_Ti_Yin_Er- ♂ (333 bytes) () 10/02/2009 postreply 06:33:13

• 回复：回复：请教:I-130被批准，但不能在美境内调整生份，要等NVC -madisonave- ♀ (17 bytes) () 10/02/2009 postreply 07:31:10

• 回复：请教:I-130被批准，但不能在美境内调整生份，要等NVC -sdfsdfsdff- ♀ (494 bytes) () 10/02/2009 postreply 13:13:33

• 回复：回复：请教:I-130被批准，但不能在美境内调整生份，要等NVC -madisonave- ♀ (10 bytes) () 10/02/2009 postreply 15:12:28

• 移民的这封信的意思是说您的亲属移民申请已经得到受理，但.... -燕子宝贝- ♀ (271 bytes) () 10/02/2009 postreply 15:55:14