diff --git a/example/trace/grpc_with_db/client/main.go b/example/trace/grpc_with_db/client/main.go
index 24f379def..5a68dacf5 100644
--- a/example/trace/grpc_with_db/client/main.go
+++ b/example/trace/grpc_with_db/client/main.go
@@ -74,5 +74,4 @@ func StartRequests() {
 		return
 	}
 	g.Log().Info(ctx, "delete id:", -1)
-
 }
diff --git a/example/trace/grpc_with_db/protobuf/user/client.go b/example/trace/grpc_with_db/protobuf/user/client.go
index f373b1167..50accd9db 100644
--- a/example/trace/grpc_with_db/protobuf/user/client.go
+++ b/example/trace/grpc_with_db/protobuf/user/client.go
@@ -7,7 +7,7 @@ import (
 )
 
 const (
-	AppID = "demo"
+	ServiceName = "demo"
 )
 
 type Client struct {
@@ -15,7 +15,7 @@ type Client struct {
 }
 
 func NewClient(options ...grpc.DialOption) (*Client, error) {
-	conn, err := krpc.Client.NewGrpcClientConn(AppID, options...)
+	conn, err := krpc.Client.NewGrpcClientConn(ServiceName, options...)
 	if err != nil {
 		return nil, err
 	}