diff --git a/.gitignore b/.gitignore
index 2f9e7515d..bb4b68554 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,8 +17,6 @@
 /public/cache/*
 /config/newrelic.yml
 /public/images/avatars/*
-/Gemfile
-/Gemfile.lock
 /db/schema.rb
 /Gemfile.lock
 /lib/plugins/acts_as_versioned/test/debug.log
diff --git a/Gemfile b/Gemfile
new file mode 100644
index 000000000..8033bf210
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,117 @@
+source 'https://ruby.taobao.org/'
+
+unless RUBY_PLATFORM =~ /w32/
+  # unix-like only
+  gem 'iconv'
+  if RUBY_PLATFORM =~ /darwin/
+    gem "rmagick", "= 2.15.4" ## osx must be this version
+  elsif RUBY_PLATFORM =~ /linux/
+    gem "rmagick", "~> 2.13.1" ## centos yum install ImageMagick-devel
+  end
+  gem 'certified'
+  gem 'net-ssh', '2.9.1'
+  gem 'jenkins_api_client'
+  gem 'nokogiri'
+end
+
+gem 'wechat',path: 'lib/wechat'
+gem 'grack', path:'lib/grack'
+gem 'gitlab', path: 'lib/gitlab-cli'
+gem 'rest-client'
+gem "mysql2", "= 0.3.18"
+gem 'redis-rails'
+gem 'rubyzip'
+gem 'delayed_job_active_record'#, :group => :production
+gem 'daemons'
+gem 'grape', '~> 0.9.0'
+gem 'grape-entity', '= 0.4.5'
+gem 'rack-cors', :require => 'rack/cors'
+gem 'seems_rateable', '~> 1.0.13'
+gem 'rails', '~> 3.2'
+gem "jquery-rails", "~> 2.0.2"
+gem "i18n", "~> 0.6.0"
+gem 'coderay', '~> 1.1.0'
+gem "fastercsv", "~> 1.5.0", :platforms => [:mri_18, :mingw_18, :jruby]
+gem "builder", "3.0.0"
+gem 'acts-as-taggable-on', '2.4.1'
+gem 'spreadsheet'
+gem 'ruby-ole'
+gem 'rails_kindeditor',path:'lib/rails_kindeditor'
+gem 'binding_of_caller'
+gem 'chinese_pinyin'
+# gem 'sunspot_rails', '~> 1.3.3'
+# gem 'sunspot_solr'
+# gem 'sunspot'
+# gem 'progress_bar'
+gem  'ansi'
+
+gem 'kaminari'
+gem 'elasticsearch-model'
+gem 'elasticsearch-rails'
+
+#rails 3.2.22.2 bug
+# gem "test-unit", "~>3.0"
+
+### profile
+# gem 'oneapm_rpm'
+# gem 'therubyracer'
+
+group :development do
+  gem 'grape-swagger'
+  gem 'better_errors', '~> 1.1.0'
+  # gem "query_reviewer"
+  gem 'rack-mini-profiler', '~> 0.9.3'
+  if RUBY_PLATFORM =~ /w32/
+    gem  'win32console'
+  end
+
+  if RUBY_PLATFORM =~ /darwin/
+    gem 'puma'
+end
+end
+
+group :development, :test do
+    if RUBY_VERSION >= '2.0.0'
+      gem 'pry-byebug'
+    gem "test-unit", "~>3.0"
+    end
+  gem 'rspec-rails', '~> 3.0'
+  gem 'factory_girl_rails'
+end
+
+# Gems used only for assets and not required
+# in production environments by default.
+group :assets do
+  gem 'sass-rails',   '~> 3.2.3'
+  gem 'coffee-rails', '~> 3.2.1'
+
+  # See https://github.com/sstephenson/execjs#readme for more supported runtimes
+  # gem 'therubyracer', :platforms => :ruby
+
+  gem 'uglifier', '>= 1.0.3'
+end
+
+# Optional gem for LDAP authentication
+group :ldap do
+  gem "net-ldap", "~> 0.3.1"
+end
+
+
+# Optional gem for OpenID authentication
+group :openid do
+  gem "ruby-openid", "~> 2.1.4", :require => "openid"
+  gem "rack-openid"
+end
+
+
+database_file = File.join(File.dirname(__FILE__), "config/database.yml")
+if File.exist?(database_file)
+else
+  warn("Please configure your config/database.yml first")
+end
+
+# Load plugins' Gemfiles
+Dir.glob File.expand_path("../plugins/*/Gemfile", __FILE__) do |file|
+  puts "Loading #{file} ..." if $DEBUG # `ruby -d` or `bundle -v`
+  instance_eval File.read(file)
+end
diff --git a/app/views/challenges/_form.html.erb b/app/views/challenges/_form.html.erb
index 5cdcefa42..ababe3b8e 100644
--- a/app/views/challenges/_form.html.erb
+++ b/app/views/challenges/_form.html.erb
@@ -56,6 +56,7 @@
   <li class="clearfix">
     <label class="panel-form-label fl">预备知识：</label>
     <div id="challenge_ready_konewlege">
+      <%#= f.text_area :ready_knowledge, :placeholder => "请输入完成当前任务依赖的知识点或者其它相关信息，指导学员完成任务" %>
       <textarea name="challenge[ready_knowledge]" placeholder = "请输入完成当前任务依赖的知识点或者其它相关信息，指导学员完成任务"></textarea>
     </div>
     <%#= f.kindeditor :ready_knowledge, :placeholder => "请输入完成当前任务依赖的知识点或者其它相关信息，指导学员完成任务", :width=>'87.5%', :height => 159, :resizeType => 0, :no_label => true %>
diff --git a/app/views/challenges/show.html.erb b/app/views/challenges/show.html.erb
index cc1f9a982..0e3e60090 100644
--- a/app/views/challenges/show.html.erb
+++ b/app/views/challenges/show.html.erb
@@ -2,14 +2,11 @@
 <%= stylesheet_link_tag "/assets/codemirror/codemirror" %>
 <%= stylesheet_link_tag "/assets/kindeditor/plugins/code/previewcode" %>
 
-<script src="lib/marked.min.js"></script>
-<script src="lib/prettify.min.js"></script>
-<script src="lib/raphael.min.js"></script>
-<script src="lib/underscore.min.js"></script>
-<script src="lib/sequence-diagram.min.js"></script>
-<script src="lib/flowchart.min.js"></script>
-<script src="lib/jquery.flowchart.min.js"></script>
-<script src="editormd.js"></script>
+
+<%= stylesheet_link_tag '/editormd/css/editormd','/editormd/css/editormd.min' %>
+<%= javascript_include_tag '/editormd/lib/marked.min.js','/editormd/lib/prettify.min.js','/editormd/lib/raphael.min.js','/editormd/lib/underscore.min.js','/editormd/lib/sequence-diagram.min.js',
+                        '/editormd/lib/flowchart.min.js','/editormd/lib/jquery.flowchart.min.js','/editormd/editormd.js'%>
+
 <script type="text/javascript">
     $(document).ready(function() {
         var wordsView;
@@ -19,7 +16,7 @@
             taskList        : true,
             tex             : true,  // 默认不解析
             flowChart       : true,  // 默认不解析
-            sequenceDiagram : true,  // 默认不解析
+            sequenceDiagram : true // 默认不解析
         });
 
     })
@@ -51,8 +48,10 @@
         </li>
         <li class="clearfix challenge_bottom">
           <label class="panel-form-label fl">预备知识：</label>
-          <div class="fl task-bg-grey panel-box-sizing panel-form-width-690">
-            <%= @challenge.ready_knowledge.blank? ? "无" : (h @challenge.ready_knowledge.html_safe) %>
+          <div class="fl task-bg-grey panel-box-sizing panel-form-width-690" id="wordsView">
+            <!--id 命名规则：challenge_ready_view-->
+            <textarea style="display:none;"><%= @challenge.ready_knowledge %></textarea>
+            <%#= @challenge.ready_knowledge.blank? ? "无" : (h @challenge.ready_knowledge.html_safe) %>
           </div>
         </li>
         <li class="clearfix">