diff --git a/cmd/server.go b/cmd/server.go
index 18d5b11..796a35d 100644
--- a/cmd/server.go
+++ b/cmd/server.go
@@ -77,12 +77,14 @@ func serverHandle(_ *cobra.Command, _ []string) {
 		return
 	}
 	defer vc.Close()
+	log.Info("Core ", vc.Type(), " started")
 	nodes := node.New()
 	err = nodes.Start(c.NodeConfig, vc)
 	if err != nil {
 		log.WithField("err", err).Error("Run nodes failed")
 		return
 	}
+	log.Info("Nodes started")
 	dns := os.Getenv("XRAY_DNS_PATH")
 	if watch {
 		err = c.Watch(config, dns, func() {
@@ -102,11 +104,13 @@ func serverHandle(_ *cobra.Command, _ []string) {
 				log.WithField("err", err).Error("Start core failed")
 				return
 			}
+			log.Info("Core ", vc.Type(), " restarted")
 			err = nodes.Start(c.NodeConfig, vc)
 			if err != nil {
 				log.WithField("err", err).Error("Run nodes failed")
 				return
 			}
+			log.Info("Nodes restarted")
 			runtime.GC()
 		})
 		if err != nil {
diff --git a/conf/node.go b/conf/node.go
index 4d55f47..393849b 100644
--- a/conf/node.go
+++ b/conf/node.go
@@ -87,6 +87,7 @@ func (o *Options) UnmarshalJSON(data []byte) error {
 		o.SingOptions = NewSingOptions()
 		return json.Unmarshal(data, o.SingOptions)
 	default:
+		o.Core = ""
 		o.RawOptions = data
 	}
 	return nil
diff --git a/core/selector.go b/core/selector.go
index f72aded..6b220fe 100644
--- a/core/selector.go
+++ b/core/selector.go
@@ -108,5 +108,13 @@ func (s *Selector) Protocols() []string {
 }
 
 func (s *Selector) Type() string {
-	return "selector"
+	t := "Selector("
+	for i := range s.cores {
+		if i != 0 {
+			t += " "
+		}
+		t += s.cores[i].Type()
+	}
+	t += ")"
+	return t
 }