diff --git a/service/app/admin/controller/QaController.php b/service/app/admin/controller/QaController.php
index 95e4117e..62958d45 100644
--- a/service/app/admin/controller/QaController.php
+++ b/service/app/admin/controller/QaController.php
@@ -75,7 +75,7 @@ class QaController extends base
         if (empty($post['city_id'])) return $this->error(2001, 'city_id data cannot be empty!');
         if (empty($post['title'])) return $this->error(2001, 'title data cannot be empty!');
 
-        $qaQuestion = $post['qaQuestions'];
+        $qaQuestion = $post['qaQuestions'] ?? null;
         unset($post['qaQuestions']);
 
         try {