請教8老師，我提交i-130表和相關材料後收到 i-797c表已兩個月，至今沒有收到移民局任何消息，是正常的嗎？
-Yes.
另外，i-864和i-864a表何時提交，是交給USCIS 還是給NVC？
-If your relative will apply for the immigrant visa in China, not file I-485 within US. Then, NVC will contact you and ask you to send the I-864/I-864A and other required docments. So, you just need to wait for NVC to contact you.
