diff --git a/Gemfile b/Gemfile
index 91a5baa..07791d5 100644
--- a/Gemfile
+++ b/Gemfile
@@ -40,6 +40,7 @@ gem "chartkick"
 gem 'usagewatch_ext'
 gem 'ckeditor'
 gem 'unicorn'
+gem 'zhconv'
 
 #built in modules
 eval(File.read(File.dirname(__FILE__) + '/built_in_extensions.rb'))
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 5117dbd..bdc95ed 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -12,6 +12,15 @@ class ApplicationController < ActionController::Base
   def set_locale
     in_use_locales = current_site.in_use_locales
 
+    if params[:locale].eql?("zh_cn") or (!params[:locale] and session[:zh_cn])
+      redirect_to root_path if !current_site.enable_zh_cn
+      params[:locale] = "zh_tw"
+      I18n.locale = session[:locale]
+      session[:zh_cn] = true
+    else
+      session[:zh_cn] = false
+    end
+
     if params[:locale]
       session[:locale] = in_use_locales.include?(params[:locale].to_sym) ? params[:locale] : nil
     end
diff --git a/app/controllers/pages_controller.rb b/app/controllers/pages_controller.rb
index 77ff834..2f33b6c 100644
--- a/app/controllers/pages_controller.rb
+++ b/app/controllers/pages_controller.rb
@@ -1,5 +1,6 @@
 # pass the layout=false for not rendering the layouts and also can specify the methods to in the backend controller.
 # data-layout-content="arrayname" in layouts can be used to render data in the array  
+require 'zhconv'
 
 class PagesController < ApplicationController
   before_action :get_key
@@ -31,7 +32,13 @@ class PagesController < ApplicationController
     impressionist(page)
     OrbitHelper.set_params params
     OrbitHelper.set_site_locale locale
-    render :html => render_final_page("home",page,true).html_safe
+    final_page = render_final_page("home",page,true)
+    if session[:zh_cn]
+      final_page =  ZhConv.convert("zh-cn", final_page)
+      final_page.gsub!('/zh_tw/','/zh_cn/')
+      final_page.sub!('<a href="/zh_cn/news">繁体中文</a>','<a href="/zh_tw/news">繁体中文</a>')
+    end
+    render :html => final_page.html_safe
   end
 
   def show
@@ -82,7 +89,13 @@ class PagesController < ApplicationController
           end
 
           impressionist(page)
-          render :html => render_final_page("#{module_app}/#{params[:target_action]}",page,layout).html_safe
+          final_page = render_final_page("#{module_app}/#{params[:target_action]}",page,layout)
+          if session[:zh_cn]
+            final_page =  ZhConv.convert("zh-cn", final_page)
+            final_page.gsub!('/zh_tw/','/zh_cn/')
+            final_page.sub!('<a href="/zh_cn/news">繁体中文</a>','<a href="/zh_tw/news">繁体中文</a>')
+          end
+          render :html => final_page.html_safe
         else
           render :file => "#{Rails.root}/public/404.html", :layout => false, :status => :not_found
         end
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 5ee7b88..da1ab52 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -310,11 +310,12 @@ module ApplicationHelper
 
   	def switch_language(loc)
   		url = request.original_fullpath
-  		if loc != locale
-	  		url = url.gsub("/#{locale.to_s}/","/#{loc.to_s}/")
-	  		url = url.gsub("locale=#{locale.to_s}","locale=#{loc.to_s}") if url == request.original_fullpath
-	  		url = url + "#{url.include?("?") ? "&" : "?"}locale=#{loc.to_s}" if url == request.original_fullpath
-	  	end
+  		
+  		locale = url.include?("zh_cn") ? :zh_cn : I18n.locale
+
+  		url = url.gsub("/#{locale.to_s}/","/#{loc.to_s}/")
+  		url = url.gsub("locale=#{locale.to_s}","locale=#{loc.to_s}") if url == request.original_fullpath
+  		url = url + "#{url.include?("?") ? "&" : "?"}locale=#{loc.to_s}" if url == request.original_fullpath and !url.include?(locale.to_s)
   		url
   	end
 
diff --git a/app/models/site.rb b/app/models/site.rb
index 762893b..6c56469 100644
--- a/app/models/site.rb
+++ b/app/models/site.rb
@@ -19,6 +19,7 @@ class Site
   field :mobile_api_openness_on, :type => Boolean, :default => false  
   field :desktop_closed, :type => Boolean, :default => false
   field :enable_language_detection, :type => Boolean, :default => false
+  field :enable_zh_cn, :type => Boolean, :default => true
   field :default_locale, :default => "en"
   field :mobile_on, :type => Boolean, :default => false
   field :announcement_category, :type => Array, :default=>[]
diff --git a/app/views/admin/sites/preference.html.erb b/app/views/admin/sites/preference.html.erb
index 3f5a2c2..8cd10a2 100644
--- a/app/views/admin/sites/preference.html.erb
+++ b/app/views/admin/sites/preference.html.erb
@@ -156,6 +156,14 @@
                     </div>
                   </div>
 
+                  <div class="control-group">
+                    <label class="control-label muted"><%= t('preferences.enable_zh_cn') %>
+                    </label>
+                    <div class="controls">
+                      <%= f.check_box :enable_zh_cn, :class => "toggle-check", data: {disabled: true} %> 
+                    </div>
+                  </div>
+
                   <div class="control-group">
                     <label class="control-label muted"><%= t('preferences.lang_enabled') %></label>
                     <div class="controls">
diff --git a/app/views/orbit_bar/index.html.erb b/app/views/orbit_bar/index.html.erb
index 3c58bad..8af67ee 100644
--- a/app/views/orbit_bar/index.html.erb
+++ b/app/views/orbit_bar/index.html.erb
@@ -83,12 +83,18 @@
         </li>
         <% end %>
         <li>
-          <span id="language"><%= t(locale.to_s) %></span>
+          <% locale = session[:zh_cn] ? :zh_cn : I18n.locale %>
+          <span id="language"><%= t((locale==:zh_tw ? :zh_tw_ : locale.to_s)) %></span>
           <ul>
             <% @site_valid_locales.each do |l| %>
-              <li class="<%= l == locale ? "active" : "" %>">
-                <a href="<%= switch_language(l) %>"><%= t(:_locale, :locale => l) %></a>
+              <li class="<%= (l == I18n.locale and !session['zh_cn']) ? "active" : "" %>">
+                <a href="<%= switch_language(l) %>"><%= t((l==:zh_tw ? :zh_tw_ : :_locale ), :locale => l) %></a>
               </li>
+              <% if current_site.enable_zh_cn and l == :zh_tw %>
+                <li class="<%= locale==:zh_cn ? "active" : "" %>">
+                  <a href="<%= switch_language(:zh_cn) %>"><%= t(:zh_cn, :locale => :zh_tw) %></a>
+                </li>
+              <% end %>
             <% end %>
           </ul>
         </li>
diff --git a/config/locales/en.yml b/config/locales/en.yml
index f6524d4..5b3c941 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -23,6 +23,8 @@ en:
   alternative: Alternative
   en: English
   zh_tw: Chinese
+  zh_tw_: Traditional Chinese
+  zh_cn: Simplified Chinese
   _locale: English 
   access:
     denied:
@@ -412,6 +414,7 @@ en:
     icon: Icon
     language: Language
     lang_detection: Enable User Language Detection
+    enable_zh_cn: Enable Simplified Chinese
     lang_enabled: Enable Language
     lang_default: Default Language
     lang_detection: Enable User Language Detection
diff --git a/config/locales/zh_tw.yml b/config/locales/zh_tw.yml
index 3694993..a7804e6 100644
--- a/config/locales/zh_tw.yml
+++ b/config/locales/zh_tw.yml
@@ -2,6 +2,8 @@ zh_tw:
 
   _locale: 中文
   zh_tw: 中文
+  zh_tw_: 繁體中文
+  zh_cn: 简体中文
   en: 英文
   access:
     denied:
@@ -405,6 +407,7 @@ zh_tw:
     backend_open: 開啟後台給所有使用者
     change: 更改
     classification: 類別
+    enable_zh_cn: 開啟簡體中文
     frontend_open: "設定後, 前台將會開放給所有使用者."
     favicon: 偏好圖示
     icon: 圖示
diff --git a/config/routes.rb b/config/routes.rb
index 3d88f90..141dd97 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -37,7 +37,7 @@ Orbit::Application.routes.draw do
 
   locales = Site.first.in_use_locales rescue I18n.available_locales
 
-  scope "(:locale)", locale: Regexp.new(locales.join("|")) do
+  scope "(:locale)", locale: Regexp.new((locales+[:zh_cn]).join("|")) do
     
     get 'users/form' => "users#form_page"
     get 'users/role_page' => "users#role_page"