How to write a letter of introduction

The introduction letter is a set of styles used to introduce contact and contact matters. It has the dual role of introduction and proof.
There are two main forms of introduction letters, general introduction letters and special introduction letters.

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The general introduction letter usually does not have a stub, and the "introduction letter" is written in the middle. The content includes: title, body, ending, signature and door date, and marked with a valid date.
There are two special introduction letters, one is the stub and the other is the introduction letter. There are seams in the middle of the two joints, and there are numbers at the same time.

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Example 1 general introduction letter

General introduction letter
Xxx:
I would like to introduce my company comrades and others, please go to your office to contact xx matters, please contact.

Sincerely

Xx company date