css – How to put special characters with ::after?

Question:

Here is the code, I want to put the character © :

h1::after{
	content: &#169;
}

You need to use CSS unicode character, example:

h1::after{
  content:"\00a9";
  font-size: 14px;
  position: relative;
  top: -10px;
  left: -5px;
}

<h1>
Empresa
</h1>

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