<!DOCTYPE html>
<html lang="en">
<head>
<title></title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<style>
.bg{
width:600px;
height:300px;
background: url("https://m.360buyimg.com/mobilecms/s1125x549_jfs/t14722/187/592723918/97556/2aaa1638/5a3238eeNa6b28be2.jpg!q70.jpg") ;
background-attachment: fixed;
}
</style>
<body>
<p>1</p>
<p>2</p>
<p>3</p>
<p>4</p>
<p>5</p>
<p>6</p>
<p>1</p>
<p>2</p>
<p>3</p>
<p>4</p>
<p>5</p>
<p>6</p>
<div class="bg"></div>
<p>1</p>
<p>2</p>
<p>3</p>
<p>4</p>
<p>5</p>
<p>6</p>
<p>1</p>
<p>2</p>
<p>3</p>
<p>4</p>
<p>5</p>
<p>6</p>
</body>
</html>
