1, title

The title of the letter is very important to me, including the sending unit, reason and language.

2. Text

The body of the letter is the main part of the document. The first part is a narrative, and the second part explains the hopes and requirements. At the end, it is clearly stated that "the above opinions can be answered by letter", "Please reply by letter" and "I will write to inform you".

3. Signature and date

Finally, there must be a signature and date, and an official seal. The signature can be personal or company, as the case may be.