diff --git a/application/views/mobile_first/ch-pc.php b/application/views/mobile_first/ch-pc.php
index 03dae533..0f0453fc 100644
--- a/application/views/mobile_first/ch-pc.php
+++ b/application/views/mobile_first/ch-pc.php
@@ -47,7 +47,7 @@
 
 <!--PC头部导航-->
 <header class="headerbar" id="header">
-
+<nav>
     <a href="/" class="p_toplogo"> <img
                 src="https://data.chinahighlights.com/pic/logo/china-highlights-top-navigation-logo.png" width="154"
                 height="83" alt="chinahighlights logo" class="chinahighlightslogo img-responsive"></a>
@@ -175,6 +175,7 @@
 
 
     </div>
+    </nav>
 </header>
 
 <!--@TOP-BANNER@-->
@@ -184,13 +185,13 @@
     <!--@HEAD_1@-->
     <div id="main_content_pc">
         <div class="pc_content">
-<section>
+<article>
             <!--@TRAIN-SEARCH@-->
             <!--@CUSTOM-CONENT@-->
-    </section>
+</article>
         </div>
         <div class="right_brand_info">
-            <section>
+            <aside>
             <div class="risk-free" style="background: #f6f6f6;width: calc(100% - 30px); margin: 55px 0 0 0;">
                 <div class="risk_free_tag"><img alt="Your Wellbeing is Our Priority"
                                                 src="https://data.chinahighlights.com/image/tour-list/tour-detail-why-choose-us-tag-3.png"
@@ -215,7 +216,7 @@
                     <li>Free changes</li>
                 </ul>
             </div>
-            </section>
+            </aside>
         </div>
         <!--@TIPS-RIGHT@-->
     </div>
diff --git a/application/views/mobile_first/ch.php b/application/views/mobile_first/ch.php
index 1402594f..2a8f2afc 100644
--- a/application/views/mobile_first/ch.php
+++ b/application/views/mobile_first/ch.php
@@ -183,12 +183,14 @@
 
 <!--@HEAD_1@-->
 <div id="main_content_mobile">
+  <article>
     <!--@TRAIN-SEARCH@-->
     <!--@CUSTOM-CONENT@-->
 
     <!--@Match-Content-GOOGLE###ycc###@-->
 
     <!--@ARTICLENEXT@-->
+</article>
 </div>
 
 <footer>