diff --git a/app/Services/ParkingAbnormalService.php b/app/Services/ParkingAbnormalService.php
index 426024d..a6575fd 100644
--- a/app/Services/ParkingAbnormalService.php
+++ b/app/Services/ParkingAbnormalService.php
@@ -79,7 +79,7 @@ class ParkingAbnormalService extends BaseService
         $item['license_plate'] = ParkingLicensePlate::getNumber(
             $item['license_plate_id']
         );
-        $item['duration'] = get_time_difference_str($item['enter_at']);
+        $item['duration'] = get_time_difference_str($item['enter_at'], $item['operation_at'] ?? '');
         $typeArr = $this->getType();
         $item['type'] = $typeArr[$item['type']];
         $statusArr = $this->getStatus();