必须准备的文件是: DS160 护照 i797A(复印) company employment letter (复印) 照片 中信银行交费收据
辅助文件: LCA (复印)and I129 (复印) OPT card (复印) resume position description,工作/研究计划: 有关您在美期间将要从事的工作或研究的详细描述,现在和以前 payment stub I20s if you had studied in US before (复印) degree certification (复印) Offer Letter (复印) 美国驾照 (复印) 美国社会安全号 (复印) 成绩单 (复印) W-2 (复印)2009 Tax return form