diff --git a/jcpp-protocol-yunkuaichong/src/main/java/sanbing/jcpp/protocol/yunkuaichong/YunKuaiChongProtocolMessageProcessor.java b/jcpp-protocol-yunkuaichong/src/main/java/sanbing/jcpp/protocol/yunkuaichong/YunKuaiChongProtocolMessageProcessor.java
index 830ea6c..4205cac 100644
--- a/jcpp-protocol-yunkuaichong/src/main/java/sanbing/jcpp/protocol/yunkuaichong/YunKuaiChongProtocolMessageProcessor.java
+++ b/jcpp-protocol-yunkuaichong/src/main/java/sanbing/jcpp/protocol/yunkuaichong/YunKuaiChongProtocolMessageProcessor.java
@@ -177,7 +177,7 @@ public class YunKuaiChongProtocolMessageProcessor extends ProtocolMessageProcess
 
         if (uplinkCmdExe == null) {
 
-            log.info("{} 云快充协议接收到未知的上行指令 {}", session, message.getCmd());
+            log.info("{} 云快充协议接收到未知的上行指令 0x{}", session, Integer.toHexString(message.getCmd()));
 
             return;
         }
@@ -190,7 +190,7 @@ public class YunKuaiChongProtocolMessageProcessor extends ProtocolMessageProcess
 
         if (downlinkCmdExe == null) {
 
-            log.info("{} 云快充协议接收到未知的下行指令 {}", session, message.getCmd());
+            log.info("{} 云快充协议接收到未知的下行指令 0x{}", session, Integer.toHexString(message.getCmd()));
 
             return;
         }