地址：http://u.eqxiu.com/s/IcAFK8Y4#rd

查看源代码：

<div id="shareImage" style="display: none;">
 <img src="http://res.eqxiu.com/group2/M00/2F/B1/yq0KEVVcPQiAC_LdAAAvSdCarfk675.jpg" />
</div>

红色地址是一张图片的地址
再看Javascript脚本代码：

<script>
 var scene = {id:17822332,code:"IcAFK8Y4",name: "那一年，我5岁", description: "", pageMode:0,cover:"group2/M00/2F/B1/yq0KEVVcPQiAC_LdAAAvSdCarfk675.jpg",bgAudio:{"url":"group2/M00/30/8B/yq0KEVVcQHeAZT-rACF7E4m2zc0775.mp3","type":"2"},property:'{"eqAdType":2,"hideEqAd":false,"triggerLoop":true,"autoFlipTime":3}',createTime:1444737613000,bizType:0};
 
 eqShow.bootstrap();
 
</script>

综上分析背景音乐的地址就是：http://res.eqxiu.com/group2/M00/30/8B/yq0KEVVcQHeAZT-rACF7E4m2zc0775.mp3