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<!DOCTYPE HTML>
<html>
<head>
<title>system generic linked families</title>
<meta charset="utf-8">
<style>
body {
margin: 50px;
}
p {
margin: 0;
display: inline-block;
width: 200px;
font-size: 32px;
line-height: 1.3em;
}
p + p { margin-top: 5px; }
#test p:before { content: "123abc 途外"; }
#test p { font-family: -apple-system; }
#test { width: 500px }
</style>
</head>
<body>
<div id=test>
<p lang="zh-cn"></p>
<p lang="zh-CN"></p>
<p lang="zh_cn"></p>
<p lang="zh_CN"></p>
</div>
</body>
</html>