diff --git a/WebStarter/Controllers/SwapMonitorController.cs b/WebStarter/Controllers/SwapMonitorController.cs
index e515852..0771f9b 100644
--- a/WebStarter/Controllers/SwapMonitorController.cs
+++ b/WebStarter/Controllers/SwapMonitorController.cs
@@ -275,6 +275,7 @@ public class SwapMonitorController : ControllerBase
             return Result<List<TboxCarInfoModel>>.Success(new List<TboxCarInfoModel>());
         }
 
-        return Result<List<TboxCarInfoModel>>.Success(carInfoList);
+
+        return Result<List<TboxCarInfoModel>>.Success(carInfoList.Where(i => i.CarNo.Length >= 17).ToList());
     }
 }
\ No newline at end of file