If you select chinese language, don't forget to adjust  also
"header.php". Change the meta line from:
<meta http-equiv="content-type" content="text/html; charset=iso-8859-2">
to: 
<meta http-equiv="content-type" content="text/html; charset=gb2312">

There is another setting you have to do. In main.php find the line
$_POST['description']=htmlentities($_POST['description'],ENT_QUOTES);
to:
$_POST['description']=htmlentities($_POST['description'],ENT_QUOTES,'gb2312');

