diff --git a/application/controllers/admin.php b/application/controllers/admin.php
index 57f07bd..fb3a9e2 100644
--- a/application/controllers/admin.php
+++ b/application/controllers/admin.php
@@ -62,7 +62,9 @@ public function pay() {
                     $this->user->set_paid($data['id']);
                     $query= $this->user->get_user_by_id($data['id']);
                     $mail = $query['mail'];
-                    $this->email->send_fee_received_mail($mail, $data['school'], $data['bill']);
+                    $association_name = $query['association_name'];
+                    $this->email->send_fee_received_and_invitation_mail($mail, $data['school'], $data['bill'], $association_name);
+
                     $response = array(
                         'code' => '0',
                         'msg' => '操作成功!'
diff --git a/application/libraries/MY_Email.php b/application/libraries/MY_Email.php
index 6e6da1d..f904b55 100644
--- a/application/libraries/MY_Email.php
+++ b/application/libraries/MY_Email.php
@@ -69,13 +69,37 @@ public function send_account_confirm_mail($mail) {
     }
 
     /*
-     * Send mail after money is received.
+     * Send mail of confirmation and invitation after money is received.
+     * $subject and $invitation needs to be updated.
      */
-    public function send_fee_received_mail($mail, $school, $fee) {
-        $subject = '第十六届全国高校自行车交流赛缴费确认';
+    public function send_fee_received_and_invitation_mail($mail, $school, $fee, $association_name) {
+        $subject = '第十六届全国高校自行车交流赛缴费确认及邀请函';
         $id = $this->ci->user->get_id($mail);
         $id_message='<br><br>贵高校本次比赛的ID是<b>' . $id . '</b>，请领队同学务必牢记，并在比赛签到时出示。<br><br>祝好！<br><br>北京大学自行车协会';
-        $message = $school . '，<br><br>贵校车协交来的' . $fee . '元参赛费用已经收到，感谢你们对北大赛的大力支持！如有任何问题，请直接与各地区负责联系。' . $id_message;
+        $invitation_message = '
+    <div style="background-image: url(\'https://s2.ax1x.com/2019/03/09/ASQKuF.md.jpg\'); background-size:100% 100%; width: 900px; height: 600px; z-index: -1; display: inline-block;">
+     </div>
+    <br><br><br>
+
+    <div style="background-image: url(\'https://s2.ax1x.com/2019/03/09/ASQ4Ej.md.jpg\'); background-size:100% 100%; width: 900px; height: 600px; z-index: -1; display: inline-block;">
+        <div style="position: relative; width: 600px; height: 400px; left: 300px; top: 100px;">
+            <p style="font-size: 25px; font-weight: bold;">
+                致 ' . $school . ' ' . $association_name . '：
+            </p>
+            <p style="font-size: 25px;">
+                北京大学自行车协会将于5月4日、5日和6日分别在北京大学和河北廊坊市固安县永定河自行车公园举办“北大车协 · 第十六届全国高校自行车交流赛”。本届比赛由xxx举办，并得到了xxx的大力支持。<br>
+                贵协作为全国知名的高校自行车运动社团，协会会员自行车运动水平优秀，学生素质高尚优良。我们诚挚邀请贵协参加“北大车协 · 第十六届全国高校自行车交流赛”， 以车会友，交流学习。
+            </p>
+
+            <p style="text-align: center; position: relative; left: 350px; width: 250px; font-size: 25px; font-weight: bold;">
+                北京大学自行车协会<br>
+                2018年4月
+            </p>
+            <img src="https://s2.ax1x.com/2019/03/09/ASQI5n.png" style="width: 150px; height: 50px;  position: relative; left: 400px; top: 0px;">
+        </div>
+    </div>
+        ';
+        $message = $school . '，<br><br>贵校车协交来的' . $fee . '元参赛费用已经收到，感谢你们对北大赛的大力支持！如有任何问题，请直接与各地区负责联系。' . $id_message.'<br><br><br>以下是第十六届全国高校自行车交流赛邀请函，可截图保存：<br><br>'.$invitation_message;
         $this->send_mail($mail, $subject, $message);
-    }
+    }    
 }