check后补充材料

nixiangnnUID: 2816097

我是F1,BJ, 4.29 check的，今天收到大使馆邮件要求下面的补充材料,有签友遇到类似的情况么准备这些材料需要注意什么呢，害怕准备的不对被拒，谢谢各位啦

Dear Applicant,
For your visa application, please provide aletter from your U.S. advisor that:
1.) Explain goals of applicant’s research andany practical applications;
2.) States sources and amount of any U.S. government money/or(funding from U.S. corporations assisting the U.S. government) to be used tosupport that research.
3.) Describes any export-controlled technology and/orinformation that will be shared with the applicant. If applicant willparticipate in or have access to U.S. government project.
4.) Sponsor should state explicitly whether suchresearch is open to non-U.S. citizens. Please send us the document needed through e-mailattachment or by fax # 010-8531-3355 within 25 days

leesuinUID: 2387744

这些都是需要问美国导师的啊，让他回答就好了吧，你不用担心