HTML Meta Language Tag Obsolete
the meta language tag:
<meta http-equiv="content-language" content="zh">
is now obsolete. See: http://www.w3.org/TR/2011/WD-html-markup-20110113/meta.http-equiv.content-language.html
instead, use the โlangโ attribute, like this:
<body lang="zh">โฆ</body>