diff --git a/extend/RegulatoryPlatform/regulatoryPlatform.php b/extend/RegulatoryPlatform/regulatoryPlatform.php
index e442155..952bfa9 100644
--- a/extend/RegulatoryPlatform/regulatoryPlatform.php
+++ b/extend/RegulatoryPlatform/regulatoryPlatform.php
@@ -80,6 +80,7 @@ class regulatoryPlatform
                 throw new BusinessException(HttpEnumCode::getMessage(HttpEnumCode::SERVER_ERROR));
             }
 
+            // 默认为6天
             $expires_in = 60 * 60 * 24 * 6;
             if (!empty($data['expiresIn'])) {
                 if ($data['expiresIn'] > 100){