diff --git a/app/controllers/files_controller.rb b/app/controllers/files_controller.rb
index 2bdd88566..a916f5351 100644
--- a/app/controllers/files_controller.rb
+++ b/app/controllers/files_controller.rb
@@ -263,12 +263,7 @@ class FilesController < ApplicationController
 
     return normal_status(-2, "该课程下没有id为 #{params[:id]}的资源") if @file.nil?
     return normal_status(403, "您没有权限进行该操作") if @user != @file.author && !@user.teacher_of_course?(@course) && !@file.public?
-    @is_pdf = false
-    file_content_type = @file.content_type
-    file_ext_type = File.extname(@file.filename).strip.downcase[1..-1]
-    if (file_content_type.present? && file_content_type.downcase.include?("pdf")) || (file_ext_type.present? && file_ext_type.include?("pdf"))
-      @is_pdf = true
-    end
+
     @attachment_histories = @file.attachment_histories
   end
 
diff --git a/app/controllers/subjects_controller.rb b/app/controllers/subjects_controller.rb
index 6a381b258..55f8722a2 100644
--- a/app/controllers/subjects_controller.rb
+++ b/app/controllers/subjects_controller.rb
@@ -86,6 +86,16 @@ class SubjectsController < ApplicationController
     @shixuns = @subject.shixuns.published.pluck(:id)
     @courses = @subject.courses if @subject.excellent
 
+    @members = @subject.subject_members.includes(:user)
+    shixuns = @subject.shixuns.published.pluck(:id)
+    challenge_ids = Challenge.where(shixun_id: shixuns).pluck(:id)
+    # 实训路径中的所有实训标签
+    @tags = ChallengeTag.where(challenge_id: challenge_ids).pluck(:name).uniq
+    # 用户获取的实训标签
+    # @user_tags = @subject.shixuns.map(&:user_tags_name).flatten.uniq
+    @user_tags = user_shixun_tags challenge_ids, @user.id
+    @my_subject_progress = @subject.my_subject_progress
+
     # 访问数变更
     @subject.increment!(:visits)
   end
diff --git a/app/controllers/users/base_controller.rb b/app/controllers/users/base_controller.rb
index 706b77802..eb6b98048 100644
--- a/app/controllers/users/base_controller.rb
+++ b/app/controllers/users/base_controller.rb
@@ -26,6 +26,12 @@ class Users::BaseController < ApplicationController
     render_forbidden
   end
 
+  def require_auth_teacher!
+    return if current_user.admin_or_business? || observed_user.certification_teacher?
+
+    render_forbidden
+  end
+
   def page_value
     params[:page].to_i <= 0 ? 1 : params[:page].to_i
   end
diff --git a/app/controllers/users/video_auths_controller.rb b/app/controllers/users/video_auths_controller.rb
index d7950f873..0eec4dffb 100644
--- a/app/controllers/users/video_auths_controller.rb
+++ b/app/controllers/users/video_auths_controller.rb
@@ -1,5 +1,5 @@
 class Users::VideoAuthsController < Users::BaseController
-  before_action :private_user_resources!
+  before_action :private_user_resources!, :require_auth_teacher!
 
   def create
     result = Videos::CreateAuthService.call(observed_user, create_params)
diff --git a/app/controllers/users/videos_controller.rb b/app/controllers/users/videos_controller.rb
index e4dffec23..1df726c0c 100644
--- a/app/controllers/users/videos_controller.rb
+++ b/app/controllers/users/videos_controller.rb
@@ -1,5 +1,5 @@
 class Users::VideosController < Users::BaseController
-  before_action :private_user_resources!
+  before_action :private_user_resources!, :require_auth_teacher!
 
   helper_method :current_video
 
diff --git a/app/models/attachment.rb b/app/models/attachment.rb
index bdd749108..3a512278a 100644
--- a/app/models/attachment.rb
+++ b/app/models/attachment.rb
@@ -115,4 +115,15 @@ class Attachment < ApplicationRecord
     end
   end
 
+  #判断是否为pdf文件
+  def is_pdf?
+    is_pdf = false
+    file_content_type = content_type
+    file_ext_type = File.extname(filename).strip.downcase[1..-1]
+    if (file_content_type.present? && file_content_type.downcase.include?("pdf")) || (file_ext_type.present? && file_ext_type.include?("pdf"))
+      is_pdf = true
+    end
+    is_pdf
+  end
+
 end
diff --git a/app/models/attachment_history.rb b/app/models/attachment_history.rb
index 220f92535..c19146b95 100644
--- a/app/models/attachment_history.rb
+++ b/app/models/attachment_history.rb
@@ -20,4 +20,14 @@ class AttachmentHistory < ApplicationRecord
     is_public == 1
   end
 
+  def is_history_pdf?
+    is_pdf = false
+    file_content_type = content_type
+    file_ext_type = File.extname(filename).strip.downcase[1..-1]
+    if (file_content_type.present? && file_content_type.downcase.include?("pdf")) || (file_ext_type.present? && file_ext_type.include?("pdf"))
+      is_pdf = true
+    end
+    is_pdf
+  end
+
 end
diff --git a/app/services/duplicate_course_service.rb b/app/services/duplicate_course_service.rb
index 8d6ce4f72..27ae2f784 100644
--- a/app/services/duplicate_course_service.rb
+++ b/app/services/duplicate_course_service.rb
@@ -11,7 +11,7 @@ class DuplicateCourseService < ApplicationService
       @course = copy_course!
 
       copy_course_modules!
-
+      Rails.logger.info("###########second_category_list#{@second_category_list}")
       join_course!
 
       copy_homework_commons!
@@ -36,13 +36,16 @@ class DuplicateCourseService < ApplicationService
   end
 
   def copy_course_modules!
+    @second_category_list = {}
     origin_course.course_modules.each do |course_module|
       attrs = course_module.as_json(only: %i[module_type position hidden module_name])
       new_course_module = CourseModule.create!(attrs.merge(course_id: course.id))
       # 复制子目录
       course_module.course_second_categories.each do |second_category|
         category_attr =  second_category.as_json(only: %i[category_type name position])
-        CourseSecondCategory.create!(category_attr.merge(course_id: course.id, course_module_id: new_course_module.id))
+        new_second_category =
+            CourseSecondCategory.create!(category_attr.merge(course_id: course.id, course_module_id: new_course_module.id))
+        @second_category_list[second_category.id] = new_second_category.id
       end
     end
   end
@@ -55,7 +58,10 @@ class DuplicateCourseService < ApplicationService
     origin_course.homework_commons.where(homework_type: %i[normal group practice]).find_each do |origin_homework|
       homework_attrs = origin_homework.as_json(only: %i[name description homework_type homework_bank_id reference_answer])
 
-      homework = HomeworkCommon.create!(homework_attrs.merge(user_id: user.id, course_id: course.id))
+      course_second_category_id = @second_category_list[origin_homework.course_second_category_id]
+
+      homework = HomeworkCommon.create!(homework_attrs.merge(user_id: user.id, course_id: course.id,
+                                                             course_second_category_id:course_second_category_id))
 
       origin_homework.attachments.find_each do |origin_attachment|
         attachment = origin_attachment.copy
@@ -76,6 +82,7 @@ class DuplicateCourseService < ApplicationService
         HomeworksService.new.create_shixun_homework_cha_setting(homework, origin_homework.shixuns.first)
       end
 
+
       origin_homework.increment!(:quotes)
       origin_homework.homework_bank.increment!(:quotes) if origin_homework.homework_bank
     end
@@ -143,9 +150,9 @@ class DuplicateCourseService < ApplicationService
       attachment.copy_from = origin_attachment.copy_from || origin_attachment.id
       attachment.is_publish = 0
       attachment.attachtype ||= 4
+      attachment.course_second_category_id = @second_category_list[origin_attachment.course_second_category_id]
 
       attachment.save!
-
       origin_course.update_quotes(attachment)
     end
   end
diff --git a/app/services/users/update_account_service.rb b/app/services/users/update_account_service.rb
index c8ba6da61..3f0aa8cc8 100644
--- a/app/services/users/update_account_service.rb
+++ b/app/services/users/update_account_service.rb
@@ -51,8 +51,10 @@ class Users::UpdateAccountService < ApplicationService
 
     if first_full_reward
       RewardGradeService.call(user, container_id: user.id, container_type: 'Account', score: 500)
-
-      sms_notify_admin(user.lastname) if user.user_extension.teacher?
+      if user.user_extension.teacher?
+        join_course(user.id,1309, 2)
+        sms_notify_admin(user.lastname)
+      end
     end
 
     user
@@ -73,4 +75,11 @@ class Users::UpdateAccountService < ApplicationService
   rescue => ex
     Util.logger_error(ex)
   end
+
+  def join_course(user_id, course_id, identity)
+    course = Course.find_by(id: course_id)
+    return unless course
+    attr = {course_id: course_id, role: identity, user_id: user_id}
+    CourseMember.create!(attr)
+  end
 end
\ No newline at end of file
diff --git a/app/views/attachment_histories/_attachment_history.json.jbuilder b/app/views/attachment_histories/_attachment_history.json.jbuilder
index 37b8b95c1..8930e1b2d 100644
--- a/app/views/attachment_histories/_attachment_history.json.jbuilder
+++ b/app/views/attachment_histories/_attachment_history.json.jbuilder
@@ -7,3 +7,4 @@ json.quotes attachment.quotes_count
 json.downloads_count attachment.downloads_count
 json.created_on attachment.created_on
 json.url attachment_path(attachment, type: 'history')
+json.is_pdf attachment.is_history_pdf?
diff --git a/app/views/attachments/_attachment_small.json.jbuilder b/app/views/attachments/_attachment_small.json.jbuilder
index d9a976bde..97cbee120 100644
--- a/app/views/attachments/_attachment_small.json.jbuilder
+++ b/app/views/attachments/_attachment_small.json.jbuilder
@@ -2,4 +2,5 @@ json.id attachment.id
 json.title attachment.title
 json.filesize number_to_human_size(attachment.filesize)
 json.url download_url(attachment)
-json.created_on attachment.created_on
\ No newline at end of file
+json.created_on attachment.created_on
+json.is_pdf attachment.is_pdf?
\ No newline at end of file
diff --git a/app/views/files/histories.json.jbuilder b/app/views/files/histories.json.jbuilder
index 9dfec4fd4..7039752e7 100644
--- a/app/views/files/histories.json.jbuilder
+++ b/app/views/files/histories.json.jbuilder
@@ -1,3 +1,3 @@
-json.is_pdf @is_pdf
+
 json.partial! 'attachments/attachment_small', attachment: @file
 json.partial! "attachment_histories/list", attachment_histories: @attachment_histories
diff --git a/app/views/subjects/show.json.jbuilder b/app/views/subjects/show.json.jbuilder
index bf179b86d..93fa105a6 100644
--- a/app/views/subjects/show.json.jbuilder
+++ b/app/views/subjects/show.json.jbuilder
@@ -22,4 +22,26 @@ if @subject.excellent
     json.course_identity @user.course_identity(course)
     json.course_status subject_course_status course
   end
+end
+
+
+json.members @members do |member|
+  json.partial! 'subject_member', locals: { user: member.user }
+  json.role member.role
+end
+
+# 技能标签
+json.tags @tags do |tag|
+  unless tag.blank?
+    json.tag_name tag
+    json.status @user_tags.include?(tag)
+  end
+end
+
+# 我的进展
+json.progress do
+  json.my_score @subject.my_subject_score
+  json.all_score @subject.all_score
+  json.learned @subject.my_subject_progress
+  json.time  @subject.my_consume_time
 end
\ No newline at end of file
diff --git a/lib/tasks/excellent_course_exercise.rake b/lib/tasks/excellent_course_exercise.rake
index c68cf6348..9f1484027 100644
--- a/lib/tasks/excellent_course_exercise.rake
+++ b/lib/tasks/excellent_course_exercise.rake
@@ -16,7 +16,16 @@ namespace :excellent_course_exercise do
     exercise_1884 = course.exercises.find_by(id: 1884)
     members_1.each_with_index do |member, index|
       if index < 821
-
+        exercise_1884.exercise_questions.where.not(question_type: 5).each do |question|
+          answer_option = {
+            :user_id => current_user.id,
+            :exercise_question_id => @exercise_question.id,
+            :exercise_choice_id => choice_id,
+            :answer_text => ""
+          }
+          ex_a = ExerciseAnswer.new(answer_option)
+          ex_a.save!
+        end
       else
 
       end
diff --git a/public/react/config/webpack.config.dev.js b/public/react/config/webpack.config.dev.js
index 6e78fd410..510bcaa4f 100644
--- a/public/react/config/webpack.config.dev.js
+++ b/public/react/config/webpack.config.dev.js
@@ -29,7 +29,7 @@ const env = getClientEnvironment(publicUrl);
 module.exports = {
   // You may want 'eval' instead if you prefer to see the compiled output in DevTools.
   // See the discussion in https://github.com/facebookincubator/create-react-app/issues/343.s
-	devtool: "cheap-module-eval-source-map",
+	// devtool: "cheap-module-eval-source-map",
 	// 开启调试
   // These are the "entry points" to our application.
   // This means they will be the "root" imports that are included in JS bundle.
diff --git a/public/react/src/modules/courses/Resource/Fileslistitem.js b/public/react/src/modules/courses/Resource/Fileslistitem.js
index f0aec7f64..5832770f1 100644
--- a/public/react/src/modules/courses/Resource/Fileslistitem.js
+++ b/public/react/src/modules/courses/Resource/Fileslistitem.js
@@ -36,7 +36,16 @@ class Fileslistitem extends Component{
                 course_id:coursesId
             },
         }).then((result)=>{
-            if(result.data.attachment_histories.length===0){
+
+						if(result.data.attachment_histories.length===0){
+							if(result.data.is_pdf===true){
+								axios.get(result.data.url).then((result)=>{
+									var binaryData = [];
+									binaryData.push(result.data);
+									this.url =window.URL.createObjectURL(new Blob(binaryData, {type:"application/pdf"}));
+									window.open(this.url);
+								})
+							}else{
 							let link = document.createElement('a');
 							document.body.appendChild(link);
 							link.href = result.data.url;
@@ -46,12 +55,15 @@ class Fileslistitem extends Component{
 							evt.initEvent("click", false, false);
 							link.dispatchEvent(evt);
 							document.body.removeChild(link);
+							}
 						}else{
-                this.setState({
-                    Showoldfiles:true,
-                    allfiles:result.data
-                })
-            }
+							this.setState({
+								Showoldfiles:true,
+								allfiles:result.data
+							})
+						}
+
+
         }).catch((error)=>{
             console.log(error)
         })
@@ -144,6 +156,7 @@ class Fileslistitem extends Component{
 								loadtype={this.state.Loadtype}
 							/>:""}
                 <Showoldfiles
+									  {...this.props}
                     visible={this.state.Showoldfiles}
                     allfiles={this.state.allfiles}
                     closaoldfilesprops={this.closaoldfilesprops}
diff --git a/public/react/src/modules/courses/coursesPublic/Showoldfiles.js b/public/react/src/modules/courses/coursesPublic/Showoldfiles.js
index 314ef44a3..8f1e7a29f 100644
--- a/public/react/src/modules/courses/coursesPublic/Showoldfiles.js
+++ b/public/react/src/modules/courses/coursesPublic/Showoldfiles.js
@@ -42,6 +42,14 @@ class Showoldfiles extends Component{
    this.props.closaoldfilesprops()
 	}
 
+	showfiless=(url)=>{
+			axios.get(url).then((result)=>{
+			var binaryData = [];
+			binaryData.push(result.data);
+			this.url =window.URL.createObjectURL(new Blob(binaryData, {type:"application/pdf"}));
+			window.open(this.url);
+		})
+	}
 	render(){
 		let {visible,allfiles}=this.props;
 
@@ -175,7 +183,10 @@ class Showoldfiles extends Component{
 												<div className="clearfix edu-txt-center lineh-40 bor-bottom-greyE" id={allfiles.id}>
 
 													<li className="fl fontlefts">
-														<a className={"isabox"} href={allfiles.url}>{allfiles.title}</a>
+														{allfiles.is_pdf===false?
+														<a className={"isabox"} href={allfiles.url} >{allfiles.title}</a>:
+															<a className={"isabox"} onClick={()=>this.showfiless(allfiles.url)} >{allfiles.title}</a>
+														}
 														<span className={"newcolor-orange fl"}>当前版本</span>
 													</li>
 
@@ -191,7 +202,11 @@ class Showoldfiles extends Component{
 																<div className="clearfix edu-txt-center lineh-40 bor-bottom-greyE" id={item.id} key={key}>
 
 																	<li className="fl fontlefts">
-																		<a  className={"isabox"} href={item.url}>{item.title}</a>
+
+																		{allfiles.is_pdf===false?
+																			<a  className={"isabox"} href={item.url}>{item.title}</a>:
+																			<a className={"isabox"} onClick={()=>this.showfiless(item.url)} >{item.title}</a>
+																		}
 																	</li>
 
 																	<li className="fl filesves ">