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<html>
<head>
<title>二维码</title>
</head>
<body>
<div style="text-align: center; padding-top: 200px">
<p style="color: #333;font-size: 24px;">请使用Android手机浏览器扫码查看效果（暂不支持微信、QQ与支付宝扫一扫）<p>
<img src="data:image/png;base64,<%= @qrcode_str -%>"/>
</div>
</body>
</html>
