Merge branch 'release/4.9.1.0'

 {{#unless isApp}}
 {{#unless isApp}}
 <header class="yoho-header">
 <header class="yoho-header">
-    <a href="//m.yohobuy.com/activity/student?openby:yohobuy={'action':'go.h5','params':{'islogin':'N','url':'{{http}}//m.yohobuy.com/activity/student'}}" class="iconfont nav-back"></a>
+    <a href="javascript:history.go(-1);" class="iconfont nav-back"></a>
     <p class="nav-title">学生身份认证</p>
     <p class="nav-title">学生身份认证</p>
 </header>
 </header>
 {{/unless}}
 {{/unless}}