diff --git a/cyberwow/lib/controller/helper.dart b/cyberwow/lib/controller/helper.dart
index 2ca3808..94fa3a6 100644
--- a/cyberwow/lib/controller/helper.dart
+++ b/cyberwow/lib/controller/helper.dart
@@ -21,10 +21,8 @@ along with CyberWOW.  If not, see <https://www.gnu.org/licenses/>.
 
 import 'dart:async';
 import 'dart:io';
-import 'dart:convert';
 
 import 'package:path_provider/path_provider.dart';
-import 'package:http/http.dart' as http;
 import 'package:flutter/foundation.dart';
 
 Future<String> getBinaryPath(String name) async {
@@ -37,36 +35,3 @@ Future<bool> binaryExists(String name) async {
   return new File(binPath).exists();
 }
 
-Future<int> targetHeight() async {
-  var url = '';
-  if (kReleaseMode) {
-    url = 'http://127.0.0.1:34568/json_rpc';
-  } else {
-    url = 'http://192.168.10.100:34568/json_rpc';
-  }
-
-  final body = json.encode
-  (
-    {
-      'jsonrpc': '2.0',
-      'id': '0',
-      'method': 'sync_info',
-    }
-  );
-
-  var response = await http.post
-  ( url,
-    body: body
-  );
-
-  // print('Response status: ${response.statusCode}');
-  if (response.statusCode != 200) {
-    return -1;
-  } else {
-    final responseBody = json.decode(response.body)['result'];
-    final targetHeight = responseBody["target_height"];
-    // print('height: ${responseBody["height"]}');
-
-    return targetHeight;
-  }
-}
diff --git a/cyberwow/lib/controller/rpc.dart b/cyberwow/lib/controller/rpc.dart
new file mode 100644
index 0000000..5d3688c
--- /dev/null
+++ b/cyberwow/lib/controller/rpc.dart
@@ -0,0 +1,79 @@
+/*
+
+Copyright 2019 fuwa
+
+This file is part of CyberWOW.
+
+CyberWOW is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+CyberWOW is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with CyberWOW.  If not, see <https://www.gnu.org/licenses/>.
+
+*/
+
+import 'dart:async';
+import 'dart:convert';
+
+import 'package:http/http.dart' as http;
+import 'package:flutter/foundation.dart';
+
+Future<http.Response> rpc(String method) async {
+  var url = '';
+  if (kReleaseMode) {
+    url = 'http://127.0.0.1:34568/json_rpc';
+  } else {
+    url = 'http://192.168.10.100:34568/json_rpc';
+  }
+
+  final body = json.encode
+  (
+    {
+      'jsonrpc': '2.0',
+      'id': '0',
+      'method': method,
+    }
+  );
+
+  var response = await http.post
+  ( url,
+    body: body
+  );
+
+  return response;
+}
+
+Future<http.Response> syncInfo() async {
+  return rpc('sync_info');
+}
+
+Future<int> targetHeight() async {
+  var response = await syncInfo();
+
+  // print('Response status: ${response.statusCode}');
+  if (response.statusCode != 200) {
+    return -1;
+  } else {
+    final responseBody = json.decode(response.body)['result'];
+    return responseBody["target_height"];
+  }
+}
+
+Future<int> height() async {
+  var response = await syncInfo();
+
+  // print('Response status: ${response.statusCode}');
+  if (response.statusCode != 200) {
+    return -1;
+  } else {
+    final responseBody = json.decode(response.body)['result'];
+    return responseBody["height"];
+  }
+}
diff --git a/cyberwow/lib/state.dart b/cyberwow/lib/state.dart
index 9fc83b1..521493c 100644
--- a/cyberwow/lib/state.dart
+++ b/cyberwow/lib/state.dart
@@ -29,6 +29,7 @@ import 'package:flutter/services.dart';
 import 'package:path_provider/path_provider.dart';
 
 import 'controller/helper.dart';
+import 'controller/rpc.dart' as rpc;
 import 'config.dart';
 
 abstract class AppState {
@@ -145,13 +146,14 @@ class SyncingState extends HookedState {
       append(line);
       print(line);
 
-      final _targetHeight = await targetHeight();
+      final _targetHeight = await rpc.targetHeight();
 
       if (_targetHeight == 0) break;
     }
 
 
     SyncedState _next = SyncedState(setState, stdout, processOutput);
+    _next.height = await rpc.height();
     setState(_next);
     return _next;
   }
@@ -159,6 +161,7 @@ class SyncingState extends HookedState {
 
 class SyncedState extends HookedState {
   String stdout;
+  int height;
   Stream<String> processOutput;
 
   SyncedState(f, this.stdout, this.processOutput) : super (f);
@@ -167,8 +170,9 @@ class SyncedState extends HookedState {
     print("Synced next");
 
     while (true) {
-      final _targetHeight = await targetHeight();
+      final _targetHeight = await rpc.targetHeight();
       if (_targetHeight != 0) break;
+      height = await rpc.height();
 
       await Future.delayed(const Duration(seconds: 2), () => "1");
     }
@@ -201,14 +205,14 @@ class ReSyncingState extends HookedState {
       append(line);
       print(line);
 
-      final _targetHeight = await targetHeight();
+      final _targetHeight = await rpc.targetHeight();
 
       if (_targetHeight == 0) break;
     }
 
     print('resync: await exit');
-
     SyncedState _next = SyncedState(setState, stdout, processOutput);
+    _next.height = await rpc.height();
     setState(_next);
     return _next;
   }
diff --git a/cyberwow/lib/widget/synced.dart b/cyberwow/lib/widget/synced.dart
index 23240cf..798b562 100644
--- a/cyberwow/lib/widget/synced.dart
+++ b/cyberwow/lib/widget/synced.dart
@@ -45,7 +45,7 @@ Widget buildSynced(BuildContext context, SyncedState state) {
               (
                 child: Text
                 (
-                  'Synced',
+                  '${state.height}',
                   style: TextStyle
                   (
                     fontFamily: 'RobotoMono',