谢谢回复！ 补充材料是美国大使馆北京办事处通知要的。现在案件还在USCIS,已经一年了每次写邮件问都是pending. 也就是说只能不断地发邮件问，没有什么好办法是吗
-That will take a long time (maybe have trouble). That means the US Consulate thought the I-526 approval was not justified, and asked USCIS to revoke your approved I-526. Now USCIS is re-processing your I-526 to see whether their original approval had a problem or not. If no, they will reaffirm their approval and ask NVC to process your case for the immigrant visa application again. If they think their orginal approval was a mistake, then they will revoke your approved case. You nearly can do nothing, but wait. Consult your lawyer.
