Example of envelope-open at 6x   Example of envelope-open at 5x    Example of envelope-open at 4x    Example of envelope-open at 3x    Example of envelope-open at 2x   Example of envelope-open

fa-envelope-open envelope-open   信封   打开    

After you get up and running, you can place Font Awesome icons just about anywhere with the <i> tag:

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Example of envelope-open fa-envelope-open
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<i class="fa fa-envelope-open" aria-hidden="true"></i>

Note: to improve web accessibility, we recommend using aria-hidden="true" to hide icons used purely for decoration.

Looking for more? Check out the examples.
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