1.何为Check
    Check有很多名称，比如Check，Name Check，背景调查，procedure，行政审查（221(g) Additional Administrative Process）。但是这都不是他的官方名称，所以有人在被签证官Check之后，直接问签证官我是不是被Checkbeatit中文歌词了，签证官会回答No。在美国的官方文档里，这个称为Visas Mantis。可以参看
  v/visa/rec ... 0Folder/C/China.htm中的简短说明：  Visas Mantis is strongly recommended for applicants with a background or purpose of trip that is listed in the TAL. Please see 9 FAM Appendix G 502.1-7.1
其中TAL便是大家常说的敏感专业列表，Technology Alert List。
2.Check的时间
    这个东西真的是因人而异吧，不要看到别人比你晚签但是早clear就认为自己被拒了，你们的情况可能根本不一样.
    这也是我个人的认识，我认为被Check了要分几种情况，但是无论哪一种，只要是被Check了，你的所有资料都会被送到华盛顿的VISA总部，也就是DOS。当然，材料不是寄过去的，具体不知道是怎样的过程，但是很快。有人说是传真到总部，但是我在中看到了Cable一词，也有可能是特殊通道过去。反正，被Check了，你的所有资料会在当天就进入华盛顿总部的数据库。
    
    襄阳市中考成绩查询网站第一种情况：你很幸运，是最快的过程。也许虽然你被Check了，但是总部认为没有必要将你移交到安全部门进入安全审查程序。那么，一般在3老歌经典个星期之内，你的状态就会clear。也有另外一种解释，你的材料很幸运的很快排除了安全因素，没有进入人工审查流程
    第二种情况：不太走运，你被送到了安全部门，就是他们说的被移交到了USCIS，或者DHS（以前的INS部门）。USCIS(U.S. Citizenship and Immigration Services), DHS(U.S. Department of Homeland Security)。进行的内容，现在知道的有Name Check(背景调查)和Fingerprint Check(指纹比对)。实际上，背景调查每个被送到DOS的人人应该都做了。
根据FBI（wsmth/bbscon.php?bid=326&id=331041，v/hq/nationalnamecheck.htm）的名字调查系统，一般人的名字调查会在3天内得到结果。
    v/congress/congress03/hardy102303.htm%    Approximately 85% of name checks are electronically returned as having "No Record" within 72 hours. 
A "No Record" indicates that the FBI's Central Records System contains no identifiable information regarding this individual. By agreement with the Department of State, partially due to our concern about the time factors in approving most visa requests, a No Record equates to a No Objection to the 
issuance of a visa.! 
    但是，并不是所有人的名字调查都没有问题。如果出现在数据库当中，名字和生日都吻合，那么就出现命中。出现命中，你的材料可能被送到FBI的相关部门经行人工审查。
    v/congress/congress03/hardy102303.htm
    If the investigative division determines there is no objection to the visa request, the request is returned to the name check dissemination desk for forwarding to the Department of State. If there is an FBI objection to the visa request, the investigative division will prepare a written Security Advisory 
Opinion (SAO) and forward it to the Department of State. In reviewing these visa requests, the FBI has identified individuals attempting to enter the United States who are of serious concern to the FBI., 
    这样的过程，FBI最终会给出一个称之为SAO的意见给Department of State，这样的过程因为人工程序的加入，就变长了。
    根据v/visa/laws/telegrams/telegrams_1425.html，没有出现吻合，使馆部门（posts）可以在10天之内同意VISA申请。
    Ref A established a clearance procedure known at the time as Visas Eagle Mantis for applicants of any nationality, coming to the U.S. at the invitation of a USG entity to engag
e in activity involving any of the sensitive technologies on the Technology Alert List. Posts were able to issue visas in those cases after a 10-working day suspense period unless otherwise directed by the Department. That provision was terminated by Ref B, which requires posts to receive an affirmative response from the Department before a visa can be issued.潘虹樾
    然而，进入了人工程序，它的时间    v/congress/congress03/hardy102303.htm
    The FBI's goal is to have all Mantis and Condor vetting requests completed within 120 days.
    Attachment A illustrates the current status of Visa Condor names checks, and Attachment B illustrates the same for Visa Mantis name checks. This status was taken on October 1, 2003. For example, for Visas Condor, the FBI received 7,986 requests during the month of September 2003. By October 1, 2003, the FBI had resolved all but 521 of these requests, for a 93% resolution rate. (See Attachment A) In the month of August 200
3, the FBI received 7,381 Visas Condor requests and by October 1, 2003, had resolved all but 257 of these requests for a 97% resolution rate. For Visas Mantis, the FBI received 1029 requests in the month of September 2003 and by October 1, 2003, had resolved 832, or 80% of them (See Attachment B). In the month of August 2003, the FBI received 1,122 Visa Mantis requests and by October 1, 2003, had resolved all but 116 of these requests for a 90% resolution rate. The percentages 
continue to rise over time, 97% of Visas Condor and 95% of Visas Mantis were resolved within 90 days. 
Visas Mantis are particularly difficult to resolve due to the predominance of requests from China and the commonality of Asian names.
    就是说，FBI只是争取在120天内完成调查，并且这个时间在经两年都难以保证。当然，美国政府正在加快这个审查过程。
    一般来说，进入这样程序的check就绝不可能在21天内清除状态。一般的时间好像在45天以上。但是，一般在最时尚的女装品牌2个月到3个月之内，FBI的调查过程会结束。
    第三种情况：三个月都没有结束。
    v/congress/congress03/hardy102303.htm9 
    Nevertheless, as I stated earlier, the FBI's resolves 98% of all types of visa requests within 120 days.
    这样的话，很不幸，属于这里的2%。FBI的调查肯定涉及到了某些困难的东西，在这样的情况下，多少时间的检查都有可能了。只能说太不幸了。如果我将是这种情况，我将怀疑这辈子是否还能进入美国了。希望没人这样
3.有何办法
    等待 < 20 天
电脑散热器排行榜
    一般的人，我这里说的是刚刚等了不到20天的，行行好，您就安心等着，在家陪父母，陪LP(LG)，不要往DOS打电话了，浪费钱，我们这些长期被Check的人还老是拨不进去。唯一要做的事情，就是如果你被要求补充材料了，往使馆发个传真，留个电话，他们会回电确认你的材料已收到，没有缺失。