unicode转换中文

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     <script type="text/javascript">
        var str = "u524Du7AEFu7801u519Cu3002";
        document.write(unescape(str).replace(/\u/g,'%u')); //前端码农。

       var str1 = "前端码农。";
       document.write(escape(str1).replace(/\%u/g,'\u'));
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