diff --git a/xhpc-modules/xhpc-power-pile/src/main/java/com/xhpc/pp/controller/ChargingController.java b/xhpc-modules/xhpc-power-pile/src/main/java/com/xhpc/pp/controller/ChargingController.java
index d92639ae..47ab00b3 100644
--- a/xhpc-modules/xhpc-power-pile/src/main/java/com/xhpc/pp/controller/ChargingController.java
+++ b/xhpc-modules/xhpc-power-pile/src/main/java/com/xhpc/pp/controller/ChargingController.java
@@ -205,7 +205,7 @@ public class ChargingController {
             data = ArrayUtils.addAll(data, HexUtils.toBytes(pileNo));
             data = ArrayUtils.addAll(data, HexUtils.toBytes(gunId));
         }
-        String msg = HexUtils.toHex(data).concat(ServiceResult.HEX_OK);
+        String msg = HexUtils.toHex(data);
         msg = msg.concat(CRCCalculator.calcCrc(msg));
         log.info("stop charging, send msg to terminal ({}{}) >>>> {}", pileNo, gunId, msg);
         return HexUtils.toBytes(msg);