我08年十月以公民给国内弟弟申请了I-130.今天收到了批准信 （I-797，Approval notice).
信上有这么一端话：
The NVC （National Visa Center）will contat the person for whom you are petitioning (beneficiary) concerning further immigrant visa processing steps.
If you have any questions about visa issurance, please contact the NVC directly. However, please allow at least 90 days before calling the NVC if your benificiary has not received correspondence from the NVC.
下一步，NVC会在九十天内跟我国内的弟弟寄信联系吗？是用I-130申请时我给的他国内地址吗？大概联系什么？然后哪？
多谢。