What is “Invitation Letter of Duly Authorized Unit”?

When it comes to China Business Visa, you may come across with the document call “Invitation Letter of Duly Authorized Unit”. This document also called as red letter, Chinese government visa invitation, or invitation letter.

china visa letter

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An invitation letter is required by the People’s Republic of China when applying for a Chinese business  visa “M” or  visit   “L” type visa. The letter is a document inviting the person…