<!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>