diff --git a/app/index/controller/ContactUs.php b/app/index/controller/ContactUs.php
index d61da2b1..c214a79d 100644
--- a/app/index/controller/ContactUs.php
+++ b/app/index/controller/ContactUs.php
@@ -212,7 +212,7 @@ class ContactUs extends Common
                 'last_name'   => $form_data['last_name'],
                 'email'       => $form_data['email'],
                 'phone'       => $form_data['phone'],
-                'interested'  => $form_data['interested'],
+                'interested'  => is_array($form_data['interested']) ? implode(',', $form_data['interested']) : $form_data['interested'],
                 'referer_url' => request()->header('referer'),
                 'website_url' => request()->header('host'),
                 'message'     => $form_data['message'],
diff --git a/app/index/view/mobile/contact_us/bulkbuy.html b/app/index/view/mobile/contact_us/bulkbuy.html
index c1b4bea5..d9634e7d 100644
--- a/app/index/view/mobile/contact_us/bulkbuy.html
+++ b/app/index/view/mobile/contact_us/bulkbuy.html
@@ -49,7 +49,7 @@
                                     {notempty name="interested"}
                                     {volist name="interested" id="it"}
                                     <label class="cit">
-                                        <input name="interested" type="checkbox" value="{$it}" class="sfbcheckboxit" />{$it}
+                                        <input name="interested[]" type="checkbox" value="{$it}" class="sfbcheckboxit" />{$it}
                                     </label>
                                     {/volist}
                                     {/notempty}
diff --git a/app/index/view/pc/contact_us/bulkbuy.html b/app/index/view/pc/contact_us/bulkbuy.html
index 5d7578da..c6e4d3a6 100644
--- a/app/index/view/pc/contact_us/bulkbuy.html
+++ b/app/index/view/pc/contact_us/bulkbuy.html
@@ -56,7 +56,7 @@
                                     {notempty name="interested"}
                                     {volist name="interested" id="it"}
                                     <label class="cit">
-                                        <input name="interested" type="checkbox" value="{$it}" class="sfbcheckboxit" />{$it} 
+                                        <input name="interested[]" type="checkbox" value="{$it}" class="sfbcheckboxit" />{$it} 
                                     </label>
                                     {/volist}
                                     {/notempty}