diff --git a/application/views/mobile_first/ah-pc.php b/application/views/mobile_first/ah-pc.php
index 27cbd771..415b2387 100644
--- a/application/views/mobile_first/ah-pc.php
+++ b/application/views/mobile_first/ah-pc.php
@@ -43,6 +43,7 @@
             <div class="p_topnavigation">
                 <a href="/" class="p_toplogo"> <img src="https://data.asiahighlights.com/pic/logo-ah.png"
                     alt="Asiahighlights logo" class="asiahighlightslogo img-responsive"></a>
+                    <nav>
                 <ul class="pctopnavi">
                     <li class="dropdown"><a href="/tours" class="p_topnavilink">Tours</a></li>
 
@@ -144,6 +145,7 @@
                         </div>
                     </li>
                 </ul>
+</nav>
             </div>
       
     </header>
@@ -157,9 +159,13 @@
     <!--PC正文-->
     <div class="main_content">
         <div id="main_content_pc">
+            <main>
             <div class="pc_content">
                 <!--@CUSTOM-CONENT@-->
             </div>
+            </main>
+
+            <aside>
             <?php if ($meta_show_advertise == 'yes' || empty($meta_show_advertise)) {?>
             <div class="right_brand_info">
                 <h3>Why Asia Highlights (10,000+ reviews & 98.8% 5-star rating)</h3>
@@ -179,6 +185,7 @@
             <?php } ?>
             <!--@TIPS-RIGHT@-->
             <!--@TIPS-RIGHT-LIST@-->
+            </aside>
             <div class="info_tm_button"><a href="/forms/tailormade?product_code=" id="create_my_trip_button_pc">Create
                     my trip</a>
             </div>
diff --git a/application/views/mobile_first/ah.php b/application/views/mobile_first/ah.php
index ba21bc93..480778d5 100644
--- a/application/views/mobile_first/ah.php
+++ b/application/views/mobile_first/ah.php
@@ -132,8 +132,9 @@
 
 
   <div id="main_content_mobile">
+  <main>
     <!--@CUSTOM-CONENT@-->
-
+  </main>
 
     <!--@TIPS-RIGHT@-->
     <div class="info_tm_button"><a href="/forms/tailormade?product_code=" id="create_my_trip_button_mobile">Create my trip</a></div>
diff --git a/application/views/mobile_first/ch-pc.php b/application/views/mobile_first/ch-pc.php
index 9c371d6f..4e7cc2e9 100644
--- a/application/views/mobile_first/ch-pc.php
+++ b/application/views/mobile_first/ch-pc.php
@@ -69,6 +69,7 @@
             <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>
+                    <nav>
             <ul class="pctopnavi">
                 <li class="dropdown"><a href="/tour/" class="p_topnavilink" id="china_tours_2021">China Tours</a>
                     <div class="chinatourspc dropdown-content">
@@ -302,17 +303,22 @@
     
         <!--@HEAD_1@-->
         <div id="main_content_pc">
+            
             <div class="pc_content">
+                <main>
                 <article>
                     <!--@TRAIN-SEARCH@-->
                     <!--@CUSTOM-CONENT@-->
                 </article>
                 <div class="wechat_button"><a href="/forms/create-my-trip.htm?product_code="
                         id="create_my_trip_button_pc">Create my trip</a></div>
-            </div>
+         </main>   </div>
+        
+            <aside>
             <!--@TIPS-RIGHT-TOP@-->
             <!--@TIPS-RIGHT@-->
             <!--@TIPS-RIGHT-LIST@-->
+            </aside>
             <div id="main_content_next">
                 <section>
                     <!--@Match-Content-GOOGLE###ycc###@-->
diff --git a/application/views/mobile_first/ch.php b/application/views/mobile_first/ch.php
index 3f339146..3c787703 100644
--- a/application/views/mobile_first/ch.php
+++ b/application/views/mobile_first/ch.php
@@ -334,6 +334,7 @@
   <!--@HEAD_1@-->
 
   <div id="main_content_mobile">
+    <main>
     <article>
       <!--@TRAIN-SEARCH@-->
       <!--@CUSTOM-CONENT@-->
@@ -342,6 +343,7 @@
 
       <!--@ARTICLENEXT@-->
     </article>
+    </main>
     <div class="wechat_button"><a href="/forms/create-my-trip.htm?product_code=" id="create_my_trip_button_mobile">Create
         My Trip</a>
     </div>
diff --git a/application/views/mobile_first/gh-pc.php b/application/views/mobile_first/gh-pc.php
index 50071c95..37230132 100644
--- a/application/views/mobile_first/gh-pc.php
+++ b/application/views/mobile_first/gh-pc.php
@@ -57,6 +57,7 @@
         <div class="p_topnavigation">
             <a href="/" class="p_toplogo"> <img src="https://data.chinahighlights.com/image/aboutus/logo-gh.png"
                     alt="Global Highlights logo" class="asiahighlightslogo img-responsive"></a>
+                    <nav>
             <ul class="pctopnavi">
                 <li class="dropdown"><a class="p_topnavilink" href="/destinations">Destinations</a>
                     <div class="dropdown-content">
@@ -174,6 +175,7 @@
                     </div>
                 </li>
             </ul>
+            </nav>
         </div>
 
     </header>
@@ -183,12 +185,15 @@
     <!--@HEAD_1@-->
     <div class="main_content">
         <div class="main_content_pc">
+            <main>
             <div class="pc_content">
                 <section>
                     <!--PC正文-->
                     <!--@CUSTOM-CONENT@-->
                 </section>
             </div>
+            </main>
+            <aside>
             <?php if (($meta_show_advertise == 'yes' || empty($meta_show_advertise))) {?>
             <div class="right_brand_info">
                 <h3>Why Global Highlights (10,000+ reviews & 98.8% 5-star rating)</h3>
@@ -208,6 +213,7 @@
             <?php } ?>
             <!--@TIPS-RIGHT@-->
             <!--@TIPS-RIGHT-LIST@-->
+            </aside>
             <div class="info_tm_button"><a href="/forms/tailormade?product_code=" id="create_my_trip_button_pc">Create
                     my trip</a>
             </div>  
diff --git a/application/views/mobile_first/gh.php b/application/views/mobile_first/gh.php
index 4e616e30..e8d33ca3 100644
--- a/application/views/mobile_first/gh.php
+++ b/application/views/mobile_first/gh.php
@@ -168,14 +168,17 @@
 
   <!--@HEAD_1@-->
   <div id="main_content_mobile">
+    <main>
     <!--MOBILE 头部图-->
     <!--MOBILE 正文-->
+  </main>
     <section>
       <!--@CUSTOM-CONENT@-->
     </section>
     <!--@ARTICLENEXT@-->
     <div class="info_tm_button"><a href="/forms/tailormade?product_code=" id="create_my_trip_button_mobile">Create my trip</a>
     </div>
+    
   </div>
 
   <!--MOBILE 正文 结束-->