Using uyan Chinese commenting

Hello

I am trying to set up a social commenting plugin similar to Disqus but for China. http://www.uyan.cc/

The instructions say I need to put the code below somewhere on the page headers. Is there a simple way to do this? I am not sure if this plugin works with multi-site either.

See: http://www.uyan.cc/getcode

<!– UY BEGIN –>

<div id=”uyan_frame”></div>

<script type=”text/javascript” id=”UYScript” src=”http://v1.uyan.cc/js/iframe.js?UYUserId=1657470&#8243; async=””></script>

<!– UY END –>