diff --git a/samples/message/msg.go b/samples/message/msg.go
index 5210c52..aff57a5 100644
--- a/samples/message/msg.go
+++ b/samples/message/msg.go
@@ -9,7 +9,7 @@ import (
 
 func main() {
 	// 创建一个设备并初始化
-	device := iot.CreateIotDevice("5fdb75cccbfe2f02ce81d4bf_go-mqtt", "123456789", "tls://iot-mqtts.cn-north-4.myhuaweicloud.com:8883")
+	device := iot.CreateIotDevice("5fdb75cccbfe2f02ce81d4bf_chentong", "123456789", "tls://iot-mqtts.cn-north-4.myhuaweicloud.com:8883")
 	device.Init()
 
 	// 注册平台下发消息的callback，当收到平台下发的消息时，调用此callback.