diff --git a/Gemfile b/Gemfile
index 55030971d..55478816f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -103,3 +103,6 @@ gem 'diffy'
 # oauth2
 gem 'omniauth', '~> 1.9.0'
 gem 'omniauth-oauth2', '~> 1.6.0'
+
+# global var
+gem 'request_store'
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 3ec8ad0f7..b3a0e123a 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -303,7 +303,7 @@ class ApplicationController < ActionController::Base
 		current_domain_session = session[:"#{default_yun_session}"]
 		if current_domain_session
 			# existing session
-			(User.active.find(current_domain_session) rescue nil)
+			User.current = (User.active.find(current_domain_session) rescue nil)
 		elsif autologin_user = try_to_autologin
 			autologin_user
 		elsif params[:format] == 'atom' && params[:key] && request.get? && accept_rss_auth?
diff --git a/app/models/laboratory.rb b/app/models/laboratory.rb
index 2ba86ed90..dab2f6f39 100644
--- a/app/models/laboratory.rb
+++ b/app/models/laboratory.rb
@@ -38,12 +38,20 @@ class Laboratory < ApplicationRecord
     find_by_identifier(subdomain)
   end
 
-  def self.current=(laboratory)
-    Thread.current[:current_laboratory] = laboratory
+  # def self.current=(laboratory)
+  #   Thread.current[:current_laboratory] = laboratory
+  # end
+  #
+  # def self.current
+  #   Thread.current[:current_laboratory] ||= Laboratory.find(1)
+  # end
+
+  def self.current=(user)
+    RequestStore.store[:current_laboratory] = user
   end
 
   def self.current
-    Thread.current[:current_laboratory] ||= Laboratory.find(1)
+    RequestStore.store[:current_laboratory] ||= User.anonymous
   end
 
   def shixuns
diff --git a/app/models/user.rb b/app/models/user.rb
index eb3ece0a4..a9b2f0b3a 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -540,12 +540,20 @@ class User < ApplicationRecord
     mail.present?
   end
 
+  # def self.current=(user)
+  #   Thread.current[:current_user] = user
+  # end
+  #
+  # def self.current
+  #   Thread.current[:current_user] ||= User.anonymous
+  # end
+
   def self.current=(user)
-    Thread.current[:current_user] = user
+    RequestStore.store[:current_user] = user
   end
 
   def self.current
-    Thread.current[:current_user] ||= User.anonymous
+    RequestStore.store[:current_user] ||= User.anonymous
   end
 
   def self.anonymous
diff --git a/public/react/src/modules/courses/busyWork/CommonWorkItem.js b/public/react/src/modules/courses/busyWork/CommonWorkItem.js
index 75676557a..82e2d2d96 100644
--- a/public/react/src/modules/courses/busyWork/CommonWorkItem.js
+++ b/public/react/src/modules/courses/busyWork/CommonWorkItem.js
@@ -205,15 +205,16 @@ class CommonWorkItem extends Component{
 									{item.uncommit_count===undefined?"":<span className="mr20 fl">{item.uncommit_count} 未交</span>}
                   {
                     item.status_time!="" && 
-                    <Tooltip placement="bottom" title={ item.status.indexOf('提交中') != -1 ? '提交剩余时间' :
-                        item.status.indexOf('补交中') != -1 ? '补交剩余时间' : 
-                        item.status.indexOf('申诉中') != -1 ? '申诉剩余时间' : 
-                        item.status.indexOf('匿评中') != -1 ? '匿评剩余时间' : 
-                        item.status.indexOf('匿评申诉中') != -1 ? '匿评申诉剩余时间' : ''}>
+
                       <span className="mr20 fl">{item.status_time}</span>
-                    </Tooltip>
-                  }
 
+                  }
+                  {/*<Tooltip placement="bottom" title={ item.status.indexOf('提交中') != -1 ? '提交剩余时间' :*/}
+                  {/*  item.status.indexOf('补交中') != -1 ? '补交剩余时间' :*/}
+                  {/*    item.status.indexOf('申诉中') != -1 ? '申诉剩余时间' :*/}
+                  {/*      item.status.indexOf('匿评中') != -1 ? '匿评剩余时间' :*/}
+                  {/*        item.status.indexOf('匿评申诉中') != -1 ? '匿评申诉剩余时间' : ''}>*/}
+                  {/*</Tooltip>*/}
                   {isAdmin && <div className="fr">
                       <WordsBtn style="blue" className="fl font-16 ml28" onClick={ () => { this.props.toEditPage(this.props.match.params, item.homework_id) }}>编辑</WordsBtn> 
                       <WordsBtn style="blue" className="fl font-16 ml28" onClick={ () => { this.props.toWorkSettingPage(this.props.match.params, item.homework_id) }}>设置</WordsBtn> 
diff --git a/public/react/src/modules/courses/shixunHomework/ShixunWorkReport.js b/public/react/src/modules/courses/shixunHomework/ShixunWorkReport.js
index 23f590dcd..1bf7ac181 100644
--- a/public/react/src/modules/courses/shixunHomework/ShixunWorkReport.js
+++ b/public/react/src/modules/courses/shixunHomework/ShixunWorkReport.js
@@ -366,10 +366,10 @@ class ShixunWorkReport extends Component {
 						<p className=" fl color-black mt25 summaryname">{data&&data.shixun_name}</p>
 						{/*{this.props.isAdmin()?<a className=" fr font-14 ml30 mt10 mr20 color-grey-9 ">导出实训报告数据</a>:""}*/}
 						<a onClick={this.goback} className="color-grey-6 fr font-14 ml20 mt15">返回</a>
-						{this.props.isAdmin() ? <a
+					 <a
 							className=" color-blue font-14 fr  ml20 mt15"
 							onClick={()=>this.confirmysl(`/student_works/${homeworkid}/export_shixun_work_report.pdf`)}
-						> <Spin size="small" spinning={this.state.isspinning}>导出实训报告数据</Spin></a> : ""}
+						> <Spin size="small" spinning={this.state.isspinning}>导出实训报告数据</Spin></a>
 						{/*{this.props.isAdmin() ?work_comment_hidden===true? "":<a*/}
 							{/*className=" color-blue font-14 fr  ml20 mt15"*/}
 							{/*onClick={()=>this.showAppraiseModal(1)}*/}
diff --git a/public/react/src/modules/courses/shixunHomework/ShixunhomeWorkItem.js b/public/react/src/modules/courses/shixunHomework/ShixunhomeWorkItem.js
index dc59d93ed..f5f06c037 100644
--- a/public/react/src/modules/courses/shixunHomework/ShixunhomeWorkItem.js
+++ b/public/react/src/modules/courses/shixunHomework/ShixunhomeWorkItem.js
@@ -393,21 +393,13 @@ class ShixunhomeWorkItem extends Component{
 
                 {
                   discussMessage.time_status===1?
-                    <Tooltip title={"提交剩余时间"} placement="bottom">
                       <span className="mr15 color-grey9">{discussMessage.status_time}</span>
-                    </Tooltip>
                   :discussMessage.time_status===2?
-                    <Tooltip title={"补交剩余时间"} placement="bottom">
                       <span className="mr15 color-grey9">{discussMessage.status_time}</span>
-                    </Tooltip>
                   :discussMessage.time_status===3?
-                      <Tooltip title={"匿评剩余时间"} placement="bottom">
                         <span className="mr15 color-grey9">{discussMessage.status_time}</span>
-                      </Tooltip>
                   :discussMessage.time_status===4?
-                        <Tooltip title={"申诉剩余时间"} placement="bottom">
                           <span className="mr15 color-grey9">{discussMessage.status_time}</span>
-                        </Tooltip>
                   :
                    <span className="mr15 color-grey9">{discussMessage.status_time}</span>
                 }