diff --git a/Application/Base/Service/PromoteCoinRecordService.class.php b/Application/Base/Service/PromoteCoinRecordService.class.php
index 1f0ec9c6c..764a1abea 100644
--- a/Application/Base/Service/PromoteCoinRecordService.class.php
+++ b/Application/Base/Service/PromoteCoinRecordService.class.php
@@ -19,7 +19,7 @@ class PromoteCoinRecordService {
     }
 
     public function createRecord($params) {
-        $sn = date('YmdHis').strtoupper(md5(json_encode($params) . 'PromoteCoinRecord' . rand(0, 99999)));
+        $sn = date('YmdHis').strtoupper(substr(md5(json_encode($params) . 'PromoteCoinRecord' . rand(0, 99999)), 8, 16));
         $data = [
             'sn' => $sn,
             'type' => $params['type'],
diff --git a/Application/Base/Service/PromoteCoinService.class.php b/Application/Base/Service/PromoteCoinService.class.php
index 76f3f247a..c44182018 100644
--- a/Application/Base/Service/PromoteCoinService.class.php
+++ b/Application/Base/Service/PromoteCoinService.class.php
@@ -34,7 +34,7 @@ class PromoteCoinService {
         if (isset($params['sn'])) {
             $sn = $params['sn'];
         } else {
-            $sn = date('YmdHis').strtoupper(md5(json_encode($params) . 'PromoteCoin' . rand(0, 99999)));
+            $sn = date('YmdHis').strtoupper(substr(md5(json_encode($params) . 'PromoteCoin' . rand(0, 99999)), 8, 16));
         }
         $data = [];
         $data['sn'] = $sn;