<html>
<head>
<title>Try Bootstrap Online</title>
<script src="https://libs.baidu.com/jquery/1.8.1/jquery.min.js"></script>
<script src="https://libs.baidu.com/bootstrap/3.0.3/js/bootstrap.min.js"></script>
<link href="https://libs.baidu.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="well well-lg">Hi, am in large well !!</div>
<div class="well well-sm">Hi, am in small well !!</div>
</body>
</html>