diff --git a/KTVAPI/iOS/Example/KTVApiDemo/KTVApiDemo/KTVViewController.swift b/KTVAPI/iOS/Example/KTVApiDemo/KTVApiDemo/KTVViewController.swift
index fca9a3a..043cd58 100644
--- a/KTVAPI/iOS/Example/KTVApiDemo/KTVApiDemo/KTVViewController.swift
+++ b/KTVAPI/iOS/Example/KTVApiDemo/KTVApiDemo/KTVViewController.swift
@@ -32,7 +32,7 @@ class KTVViewController: UIViewController {
     let coSingerId = 2000
     let audienceId = 3000
     
-    let mccSongCode = 6625526603433040
+    let mccSongCode = 7162848698410430
     
     var lyricView: KTVLyricView!
     
@@ -211,7 +211,7 @@ class KTVViewController: UIViewController {
                 self.ktvApi.setLrcView(view: self.lyricView)
                 self.ktvApi.addEventHandler(ktvApiEventHandler: self)
                 
-                self.rtcKit.joinChannel(byToken: KeyCenter.Token, channelId: self.channelName, uid: UInt(self.userId), mediaOptions: self.mediaOptions())
+                self.rtcKit.joinChannel(byToken: rtcToken, channelId: self.channelName, uid: UInt(self.userId), mediaOptions: self.mediaOptions())
                 self.loadMusic()
             }
         }
diff --git a/KTVAPI/iOS/Example/KTVApiDemo/KTVApiDemo/KeyCenter.swift b/KTVAPI/iOS/Example/KTVApiDemo/KTVApiDemo/KeyCenter.swift
new file mode 100644
index 0000000..06e385a
--- /dev/null
+++ b/KTVAPI/iOS/Example/KTVApiDemo/KTVApiDemo/KeyCenter.swift
@@ -0,0 +1,49 @@
+//
+//  KeyCenter.swift
+//  OpenLive
+//
+//  Created by GongYuhua on 6/25/16.
+//  Copyright © 2016 Agora. All rights reserved.
+//
+import Foundation
+
+@objcMembers
+class KeyCenter: NSObject {
+    
+    /**
+     Agora APP ID.
+     Agora assigns App IDs to app developers to identify projects and organizations.
+     If you have multiple completely separate apps in your organization, for example built by different teams,
+     you should use different App IDs.
+     If applications need to communicate with each other, they should use the same App ID.
+     In order to get the APP ID, you can open the agora console (https://console.shengwang.cn/) to create a project,
+     then the APP ID can be found in the project detail page.
+     声网APP ID
+     Agora 给应用程序开发人员分配 App ID，以识别项目和组织。如果组织中有多个完全分开的应用程序，例如由不同的团队构建，
+     则应使用不同的 App ID。如果应用程序需要相互通信，则应使用同一个App ID。
+     进入声网控制台(https://console.shengwang.cn/)，创建一个项目，进入项目配置页，即可看到APP ID。
+     */
+
+    static let AppId: String = <#Your AppId#>
+  
+    /**
+     Certificate.
+     Agora provides App certificate to generate Token. You can deploy and generate a token on your server,
+     or use the console to generate a temporary token.
+     In order to get the APP ID, you can open the agora console (https://console.shengwang.cn/) to create a project with the App Certificate enabled,
+     then the APP Certificate can be found in the project detail page.
+     PS: If the project does not have certificates enabled, leave this field blank.
+     声网APP证书
+     Agora 提供 App certificate 用以生成 Token。您可以在您的服务器部署并生成，或者使用控制台生成临时的 Token。
+     进入声网控制台(https://console.shengwang.cn/)，创建一个带证书鉴权的项目，进入项目配置页，即可看到APP证书。
+     注意：如果项目没有开启证书鉴权，这个字段留空。
+     */
+
+    static let Certificate: String? = <#Your AppCertificate#>
+    
+    // cantata cloud server key
+    static let CloudPlayerKey: String? = ""
+    // cantata cloud server secret
+    static let CloudPlayerSecret: String? = ""
+    
+}
diff --git a/KTVAPI/iOS/Example/KTVApiDemo/KTVApiDemo/NetworkManager.swift b/KTVAPI/iOS/Example/KTVApiDemo/KTVApiDemo/NetworkManager.swift
index 8a863df..2d3a14d 100644
--- a/KTVAPI/iOS/Example/KTVApiDemo/KTVApiDemo/NetworkManager.swift
+++ b/KTVAPI/iOS/Example/KTVApiDemo/KTVApiDemo/NetworkManager.swift
@@ -11,6 +11,7 @@ public let kAppProjectValue = "agora_ent_demo"
 public let kAppOS = "appOs"
 public let kAppOSValue = "iOS"
 public let kAppVersion = "versionName"
+public let kAppAuthHeader = ""
 
 @objc
 class NetworkManager:NSObject {
@@ -44,8 +45,8 @@ class NetworkManager:NSObject {
             kAppOS: kAppOSValue,
             kAppVersion: "0.0.1"
         ]
-        if KeyCenter.Token?.count ?? 0 > 0  {
-            config.httpAdditionalHeaders?["Authorization"] = KeyCenter.Token
+        if kAppAuthHeader.count  > 0  {
+            config.httpAdditionalHeaders?["Authorization"] = kAppAuthHeader
         }
         config.timeoutIntervalForRequest = 30
         config.timeoutIntervalForResource = 30