diff --git a/router/handler/onvif/connection.go b/router/handler/onvif/connection.go
index e4fb256..381cbc3 100644
--- a/router/handler/onvif/connection.go
+++ b/router/handler/onvif/connection.go
@@ -9,7 +9,7 @@ import (
 var conns = make(map[string]*onvif.Connection)
 
 func CreateConnection(c *gin.Context) {
-	conn, err := onvif.NewConnection("172.16.19.239", "admin", "admin123")
+	conn, err := onvif.NewConnection("172.16.19.239:80", "admin", "admin123")
 	if err != nil {
 		c.JSON(http.StatusServiceUnavailable, gin.H{
 			"message": err.Error(),
diff --git a/router/handler/onvif/subscription.go b/router/handler/onvif/subscription.go
index b142e32..e30f229 100644
--- a/router/handler/onvif/subscription.go
+++ b/router/handler/onvif/subscription.go
@@ -12,7 +12,8 @@ import (
 
 func CreateEventSubscription(c *gin.Context) {
 	xaddr := c.Param("xaddr")
-	callbackURL := event.AttributedURIType(fmt.Sprintf("%s/subscriptions/callback", config.Conf.App.URL))
+	callbackURL := event.AttributedURIType(fmt.Sprintf("%s/onvif/subscriptions/%s/callback", config.Conf.App.URL, xaddr))
+	log.Printf("CreateEventSubscription callback URL: %s", callbackURL)
 	result, err := conns[xaddr].SubscribeEvents(callbackURL, "PT60S")
 	if err != nil {
 		c.JSON(http.StatusServiceUnavailable, gin.H{
@@ -25,6 +26,9 @@ func CreateEventSubscription(c *gin.Context) {
 }
 
 func EventNotifyCallback(c *gin.Context) {
+	xaddr := c.Param("xaddr")
+	log.Printf("EventNotifyCallback from: %s", xaddr)
+
 	var notify event.Notify
 	envelope := gosoap.NewSOAPEnvelope(&notify)
 	if err := c.ShouldBindXML(&envelope); err != nil {
@@ -34,7 +38,7 @@ func EventNotifyCallback(c *gin.Context) {
 
 	// TODO: handle notifications
 	for _, msg := range envelope.Body.Content.(*event.Notify).NotificationMessage {
-		log.Println(msg.Topic.TopicKinds, msg.Message.Message)
+		log.Printf("Topic: %s, Message: %s", msg.Topic.TopicKinds, msg.Message.Message)
 	}
 
 	c.JSON(http.StatusOK, gin.H{"message": "OK"})
diff --git a/router/handler/ping.go b/router/handler/ping.go
new file mode 100644
index 0000000..5ec69b5
--- /dev/null
+++ b/router/handler/ping.go
@@ -0,0 +1,11 @@
+package handler
+
+import (
+	"github.com/gin-gonic/gin"
+)
+
+func Ping(c *gin.Context) {
+	c.JSON(200, gin.H{
+		"message": "pong",
+	})
+}
diff --git a/router/router.go b/router/router.go
index d2bc1f7..984171a 100644
--- a/router/router.go
+++ b/router/router.go
@@ -2,11 +2,13 @@ package router
 
 import (
 	"github.com/gin-gonic/gin"
+	"onvif-agent/router/handler"
 	"onvif-agent/router/handler/onvif"
 )
 
 func SetupRoutes(r *gin.Engine) {
-	// ONVIF 相关路由
+	r.GET("/ping", handler.Ping)
+
 	userGroup := r.Group("/onvif")
 	{
 		connectionGroup := userGroup.Group("/connections")
@@ -20,7 +22,7 @@ func SetupRoutes(r *gin.Engine) {
 		subscriptionGroup := userGroup.Group("/subscriptions")
 		{
 			subscriptionGroup.POST("/:xaddr", onvif.CreateEventSubscription)
-			subscriptionGroup.POST("/callback", onvif.EventNotifyCallback)
+			subscriptionGroup.POST("/:xaddr/callback", onvif.EventNotifyCallback)
 		}
 	}
 }