求 Invited talk 的证明信 , 会议chair给写的那种# Immigration - 落地生根k*e2015-05-19 07:051 楼如题。求 Invited talk 的证明信 , 会议chair给写的那种, 希望有小伙伴写过的可以分享。谢谢
k*e2015-05-19 07:052 楼Another follow-up question: the recipient of this kind of letter should be "Dear immigration officer:", right?