diff --git a/src/main/resources/mapper/CarMapper.xml b/src/main/resources/mapper/CarMapper.xml
index 2846c79..da928c7 100644
--- a/src/main/resources/mapper/CarMapper.xml
+++ b/src/main/resources/mapper/CarMapper.xml
@@ -33,7 +33,7 @@
         zom.pick_car_time,
         zc.update_time,
         zc.store_id,
-        zc.iot_code,
+        zc.lot_number as iot_code,
         zc.iot_status,
         zcm.max_speed,
         zcm.weight