diff --git a/app/controllers/exercise_banks_controller.rb b/app/controllers/exercise_banks_controller.rb
index 160393e0c..9a35bfcdb 100644
--- a/app/controllers/exercise_banks_controller.rb
+++ b/app/controllers/exercise_banks_controller.rb
@@ -1,7 +1,7 @@
 #encoding: UTF-8
 class ExerciseBanksController < ApplicationController
   before_action :require_login
-  before_action :find_bank, except: [:choose_shixun]
+  before_action :find_bank, :bank_visit_auth, except: [:choose_shixun]
   before_action :bank_admin, only: [:update]
   before_action :commit_shixun_present, only: [:commit_shixun]
 
diff --git a/app/controllers/gtopic_banks_controller.rb b/app/controllers/gtopic_banks_controller.rb
index e0382b21a..f09a8554c 100644
--- a/app/controllers/gtopic_banks_controller.rb
+++ b/app/controllers/gtopic_banks_controller.rb
@@ -1,6 +1,6 @@
 class GtopicBanksController < ApplicationController
   before_action :require_login
-  before_action :find_bank
+  before_action :find_bank, :bank_visit_auth
   before_action :bank_admin, only: [:edit, :update]
 
   def show
diff --git a/app/controllers/homework_banks_controller.rb b/app/controllers/homework_banks_controller.rb
index 31e733245..61bded033 100644
--- a/app/controllers/homework_banks_controller.rb
+++ b/app/controllers/homework_banks_controller.rb
@@ -1,6 +1,6 @@
 class HomeworkBanksController < ApplicationController
   before_action :require_login
-  before_action :find_bank
+  before_action :find_bank, :bank_visit_auth
   before_action :bank_params, only: [:update]
   before_action :bank_admin, only: [:update, :destroy, :set_public]
 
diff --git a/app/controllers/task_banks_controller.rb b/app/controllers/task_banks_controller.rb
index 1d3aca955..b88768456 100644
--- a/app/controllers/task_banks_controller.rb
+++ b/app/controllers/task_banks_controller.rb
@@ -1,6 +1,6 @@
 class TaskBanksController < ApplicationController
   before_action :require_login
-  before_action :find_bank
+  before_action :find_bank, :bank_visit_auth
   before_action :bank_visit_auth
   before_action :bank_admin, only: [:update]
 
diff --git a/app/decorators/tiding_decorator.rb b/app/decorators/tiding_decorator.rb
index 81093dc12..d43aa5e2d 100644
--- a/app/decorators/tiding_decorator.rb
+++ b/app/decorators/tiding_decorator.rb
@@ -86,7 +86,7 @@ module TidingDecorator
 
   def teacher_join_course_content
     name = Course.find_by(id: container_id)&.name
-    I18n.t(locale_format extra) % [user.show_real_name, name]
+    I18n.t(locale_format extra) % [trigger_user&.show_real_name, name]
   end
 
   def apply_add_department_content
diff --git a/public/react/src/modules/courses/busyWork/NewWorkForm.js b/public/react/src/modules/courses/busyWork/NewWorkForm.js
index 33d6e4cda..6083252bc 100644
--- a/public/react/src/modules/courses/busyWork/NewWorkForm.js
+++ b/public/react/src/modules/courses/busyWork/NewWorkForm.js
@@ -110,23 +110,27 @@ class NewWorkForm extends Component{
       {/* min={has_commit ? init_max_num : (min_num == undefined ? 2 : min_num + 1) }  */}
       // 已有提交作品，人数范围只能扩大
       const { has_commit, max_num, init_max_num, min_num, init_min_num } = this.state;
-      if (!min_num) {
-        this.props.showNotification('最小人数不能为空');
-        return;
-      } else if (min_num < 1) {
-        this.props.showNotification('最小人数不能小于1');
-        return;
-      } else if (!max_num) {
-        this.props.showNotification('最大人数不能为空');
-        return;
-      } else if (max_num < min_num) {
-        this.props.showNotification('最大人数不能小于最小人数');
-        return;
-      } 
-      if (has_commit) {
-        if (max_num < init_max_num || min_num > init_min_num) {
-          this.props.showNotification(`已有提交作品，人数范围只能扩大(原设置为：${init_min_num} - ${init_max_num})`)
+      const isGroup = this.props.isGroup()
+      if (isGroup) {
+        if (!min_num) {
+          this.props.showNotification('最小人数不能为空');
           return;
+        } else if (min_num < 1) {
+          this.props.showNotification('最小人数不能小于1');
+          return;
+        } else if (!max_num) {
+          this.props.showNotification('最大人数不能为空');
+          return;
+        } else if (max_num < min_num) {
+          this.props.showNotification('最大人数不能小于最小人数');
+          return;
+        } 
+        
+        if (has_commit) {
+          if (max_num < init_max_num || min_num > init_min_num) {
+            this.props.showNotification(`已有提交作品，人数范围只能扩大(原设置为：${init_min_num} - ${init_max_num})`)
+            return;
+          }
         }
       }