diff --git a/app/Services/InquiryService.php b/app/Services/InquiryService.php
index 81f9bee..6ee3266 100644
--- a/app/Services/InquiryService.php
+++ b/app/Services/InquiryService.php
@@ -478,7 +478,7 @@ class InquiryService extends BaseService
         }
 
         // 检测项目
-        $order_inquiry_case['detection_project'] = array();
+        $order_inquiry_case['detection_project'] = null;
         if ($order_inquiry['inquiry_type'] == 5){
             // 获取检测订单
             $params = array();