diff --git a/Gemfile b/Gemfile
index 7a37b7c44..ad254d436 100644
--- a/Gemfile
+++ b/Gemfile
@@ -48,7 +48,6 @@ gem 'rqrcode_png'
 gem 'acts-as-taggable-on', '~> 6.0'
 
 group :development, :test do
-  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
   gem 'rspec-rails', '~> 3.8'
 end
 
diff --git a/app/controllers/admins/laboratories_controller.rb b/app/controllers/admins/laboratories_controller.rb
index 716275468..dcfdc443b 100644
--- a/app/controllers/admins/laboratories_controller.rb
+++ b/app/controllers/admins/laboratories_controller.rb
@@ -50,6 +50,13 @@ class Admins::LaboratoriesController < Admins::BaseController
     @subjects = paginate(subjects.includes(:user))
   end
 
+  def synchronize_user
+    school = current_laboratory.school
+    users = User.joins(:user_extension).where(user_extensions: {school_id: school.id})
+    users.update_all(laboratory_id: current_laboratory.id)
+  end
+
+
   private
 
   def current_laboratory
diff --git a/app/views/admins/laboratories/shared/_laboratory_item.html.erb b/app/views/admins/laboratories/shared/_laboratory_item.html.erb
index abfcda349..539e7d09f 100644
--- a/app/views/admins/laboratories/shared/_laboratory_item.html.erb
+++ b/app/views/admins/laboratories/shared/_laboratory_item.html.erb
@@ -34,7 +34,8 @@
 
   <% if school.present? && laboratory.id != 1 %>
     <%= javascript_void_link '添加管理员', class: 'action', data: { laboratory_id: laboratory.id, toggle: 'modal', target: '.admin-add-laboratory-user-modal' } %>
-  <% end %>
+    <%= link_to '同步用户', synchronize_user_admins_laboratory_path(laboratory), remote: true, data: { confirm: '确认同步该单位下的所有用户到云上实验室吗？' }, class: 'action' %>
+<% end %>
 
   <div class="d-inline">
     <%= javascript_void_link('更多', class: 'action dropdown-toggle', 'data-toggle': 'dropdown', 'aria-haspopup': true, 'aria-expanded': false) %>
diff --git a/app/views/admins/laboratories/synchronize_user.js.erb b/app/views/admins/laboratories/synchronize_user.js.erb
new file mode 100644
index 000000000..d2a365007
--- /dev/null
+++ b/app/views/admins/laboratories/synchronize_user.js.erb
@@ -0,0 +1 @@
+alert("同步成功");
\ No newline at end of file
diff --git a/config/routes.rb b/config/routes.rb
index efc08d901..598072bca 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -1052,6 +1052,7 @@ Rails.application.routes.draw do
       member do
         get :shixuns_for_select
         get :subjects_for_select
+        get :synchronize_user
       end
 
       resource :laboratory_setting, only: [:show, :update]
diff --git a/public/images/educoder/courses/courses.jpg b/public/images/educoder/courses/courses.jpg
new file mode 100644
index 000000000..9447b74be
Binary files /dev/null and b/public/images/educoder/courses/courses.jpg differ
diff --git a/public/react/src/modules/courses/coursesHome/CoursesHome.js b/public/react/src/modules/courses/coursesHome/CoursesHome.js
index 56de3ba7f..c02c49ee9 100644
--- a/public/react/src/modules/courses/coursesHome/CoursesHome.js
+++ b/public/react/src/modules/courses/coursesHome/CoursesHome.js
@@ -119,7 +119,7 @@ class CoursesHome extends Component{
 										.courses-head{
 												width: 100%;
 												height: 300px;
-												background-image: url(${getImageUrl(this.props.mygetHelmetapi && this.props.mygetHelmetapi.course_banner_url === null ?`images/educoder/competitions/courses.jpg`:this.props.mygetHelmetapi&&this.props.mygetHelmetapi.course_banner_url)});
+												background-image: url(${getImageUrl(this.props.mygetHelmetapi && this.props.mygetHelmetapi.course_banner_url === null ?`images/educoder/courses/courses.jpg`:this.props.mygetHelmetapi&&this.props.mygetHelmetapi.course_banner_url)});
 											  background-color: #081C4B;
 												background-position: center;
 												background-repeat: no-repeat;
diff --git a/public/react/src/modules/login/LoginDialog.js b/public/react/src/modules/login/LoginDialog.js
index 1a5802782..a4e9c0c4f 100644
--- a/public/react/src/modules/login/LoginDialog.js
+++ b/public/react/src/modules/login/LoginDialog.js
@@ -590,7 +590,7 @@ class LoginDialog extends Component {
         if (isRender === undefined) {
             isRender = false
         }
-      // console.log(this.props)
+
     	return (
 			<Dialog open={true} id="DialogID"
               className="zindextest"
@@ -604,7 +604,19 @@ class LoginDialog extends Component {
           setNotcompleteds={()=>{this.setNotcompleteds()}}
         />
 
-				{this.state.isphone===false||this.props.user&&this.props.user.main_site===false?<style>
+				{/*{this.state.isphone===false||this.props.user&&this.props.user.main_site===false?<style>*/}
+					{/*{*/}
+						{/*`*/}
+						  {/*#DialogID .dialogBox {*/}
+									{/*width: 405px !important;*/}
+							{/*}*/}
+							{/*.dialogBox {*/}
+									{/*height: 290px !important;*/}
+							{/*}*/}
+						{/*`*/}
+					{/*}*/}
+				{/*</style>:""}*/}
+				<style>
 					{
 						`
 						  #DialogID .dialogBox {
@@ -615,7 +627,7 @@ class LoginDialog extends Component {
 							}
 						`
 					}
-				</style>:""}
+				</style>
 				{isRender===true?
             <div className={dialogBox}>
                   <div id="closeIcon" className={"logincloseIcon"} onClick={()=>{this.handleDialogClose()}}>
diff --git a/public/react/src/modules/tpm/NewHeader.js b/public/react/src/modules/tpm/NewHeader.js
index 7a3c545ce..551ab2b0e 100644
--- a/public/react/src/modules/tpm/NewHeader.js
+++ b/public/react/src/modules/tpm/NewHeader.js
@@ -1284,7 +1284,7 @@ submittojoinclass=(value)=>{
               <div className="edu-menu-list"  style={{top: '60px',width:"240px"}}>
                 <div className="overPart"></div>
                 <ul className={coursestypes===true&&this.props.user&&this.props.user.main_site===false?"fl headwith100b edu-txt-center pr ul-leftline":"fl with50 edu-txt-center pr ul-leftline"}>
-									{this.props.current_user&&this.props.current_user.user_identity==="学生"?"":coursestypes===true?"":<li><a  onClick={(url)=>this.getUser("/courses/new")}>{this.props.user&&this.props.user.main_site===false?"新建课堂":"翻转课堂"}</a></li>}
+									{this.props.current_user&&this.props.current_user.user_identity==="学生"?"":coursestypes===true?"":<li><a  onClick={(url)=>this.getUser("/courses/new")}>{this.props.user&&this.props.user.main_site===false?"新建课堂":"新建翻转课堂"}</a></li>}
 									{shixuntype===true?"":<li><a onClick={(url)=>this.getUser("/shixuns/new")}>新建实训项目</a></li>}
                   {this.props.Headertop===undefined?"":
 										pathstype===true?"":this.props.user&&this.props.user.main_site===true||this.props.user&&this.props.user.admin===true?<li><a onClick={(url)=>this.getUser("/paths/new")} >新建实践课程</a></li>:""