diff --git a/application/views/mobile_first/ah-structured-data-breadcrumb.php b/application/views/mobile_first/ah-structured-data-breadcrumb.php
index 5a304b2b..8198257b 100644
--- a/application/views/mobile_first/ah-structured-data-breadcrumb.php
+++ b/application/views/mobile_first/ah-structured-data-breadcrumb.php
@@ -1,5 +1,5 @@
 <script type="application/ld+json">
-  {
+{
     "@context": "https://schema.org",  
     "@type": "BreadcrumbList",
     "itemListElement": [{
@@ -25,4 +25,4 @@
     <?php }?>
     ]
   }
-  </script>
\ No newline at end of file
+</script>
\ No newline at end of file
diff --git a/application/views/mobile_first/ch-train-detail.php b/application/views/mobile_first/ch-train-detail.php
index f4c7c22c..760a5a11 100644
--- a/application/views/mobile_first/ch-train-detail.php
+++ b/application/views/mobile_first/ch-train-detail.php
@@ -50,12 +50,14 @@
   <script defer type="text/javascript" src="https://data.chinahighlights.com/js/train/StationInfo.js"></script>
   
 </div>
-<!-- Global site tag (gtag.js) - Google Analytics -->
-<script async src="https://www.googletagmanager.com/gtag/js?id=UA-31694-20"></script>
-<script>
-  window.dataLayer = window.dataLayer || [];
-  function gtag(){dataLayer.push(arguments);}
-  gtag('js', new Date());
-
-  gtag('config', 'UA-31694-20');
-</script>
\ No newline at end of file
+<!-- Google Tag Manager -->
+<script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
+new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
+j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
+'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
+})(window,document,'script','dataLayer','GTM-TBN4KMD7');</script>
+<!-- End Google Tag Manager -->
+<!-- Google Tag Manager (noscript) -->
+<noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-TBN4KMD7"
+height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
+<!-- End Google Tag Manager (noscript) -->
\ No newline at end of file
diff --git a/application/views/mobile_first/ch-train-index.php b/application/views/mobile_first/ch-train-index.php
index a76aef2f..bd141c47 100644
--- a/application/views/mobile_first/ch-train-index.php
+++ b/application/views/mobile_first/ch-train-index.php
@@ -82,12 +82,14 @@
 <!-- <link href="https://data.chinahighlights.com/js/train-mobile/train-search-index.css" rel="stylesheet" type="text/css" /> -->
 <script defer type="text/javascript" src="https://data.chinahighlights.com/js/train-mobile/train.js"></script>
 <script defer type="text/javascript" src="https://data.chinahighlights.com/js/train/StationInfo.js"></script>
-<!-- Global site tag (gtag.js) - Google Analytics -->
-<script async src="https://www.googletagmanager.com/gtag/js?id=UA-31694-20"></script>
-<script>
-  window.dataLayer = window.dataLayer || [];
-  function gtag(){dataLayer.push(arguments);}
-  gtag('js', new Date());
-
-  gtag('config', 'UA-31694-20');
-</script>
\ No newline at end of file
+<!-- Google Tag Manager -->
+<script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
+new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
+j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
+'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
+})(window,document,'script','dataLayer','GTM-TBN4KMD7');</script>
+<!-- End Google Tag Manager -->
+<!-- Google Tag Manager (noscript) -->
+<noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-TBN4KMD7"
+height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
+<!-- End Google Tag Manager (noscript) -->
\ No newline at end of file