diff --git a/app/models/homework_common.rb b/app/models/homework_common.rb
index ac64b92c1..9aa4a8fe1 100644
--- a/app/models/homework_common.rb
+++ b/app/models/homework_common.rb
@@ -35,7 +35,7 @@ class HomeworkCommon < ApplicationRecord
   has_many :homework_review_results, :dependent => :destroy
 
   validates :name, length: { maximum: 60 }
-  validates :description, length: { maximum: 5000 }
+  validates :description, length: { maximum: 15000 }
   validates :reference_answer, length: { maximum: 5000 }
 
   # after_update :update_activity
diff --git a/db/migrate/20190726082937_add_is_md_for_homeworks.rb b/db/migrate/20190726082937_add_is_md_for_homeworks.rb
new file mode 100644
index 000000000..0b25dde97
--- /dev/null
+++ b/db/migrate/20190726082937_add_is_md_for_homeworks.rb
@@ -0,0 +1,12 @@
+class AddIsMdForHomeworks < ActiveRecord::Migration[5.2]
+  def change
+    # add_column :homework_commons, :is_md, :boolean, :default => true
+    # add_column :homework_banks, :is_md, :boolean, :default => true
+    #
+    #
+    # add_column :exercise_questions,:is_md, :boolean, :default => true
+    # add_column :poll_questions,:is_md, :boolean, :default => true
+    #
+    # add_column :exercise_bank_questions, :is_md, :boolean, :default => true
+  end
+end
diff --git a/db/migrate/20190726083814_migrate_course_is_md.rb b/db/migrate/20190726083814_migrate_course_is_md.rb
new file mode 100644
index 000000000..6988db14a
--- /dev/null
+++ b/db/migrate/20190726083814_migrate_course_is_md.rb
@@ -0,0 +1,14 @@
+class MigrateCourseIsMd < ActiveRecord::Migration[5.2]
+  def change
+    # HomeworkCommon.where(homework_type: [1, 3]).where("created_at < '2019-07-21 00:00:00'").update_all(is_md: false)
+    # HomeworkBank.where(homework_type: [1, 3]).where("created_at < '2019-07-21 00:00:00'").update_all(is_md: false)
+    #
+    # HomeworkCommon.where(homework_type: [1, 3]).where("created_at >= '2019-07-21 00:00:00' and homework_bank_id is not null").each do |homework|
+    #
+    # end
+    #
+    # ExerciseQuestion.where("created_at < '2019-07-21 00:00:00'").update_all(is_md: false)
+    # PollQuestion.where("created_at < '2019-07-21 00:00:00'").update_all(is_md: false)
+    # ExerciseBankQuestion.where("created_at < '2019-07-21 00:00:00'").update_all(is_md: false)
+  end
+end
diff --git a/public/react/src/common/TextUtil.js b/public/react/src/common/TextUtil.js
index 05299467b..82a848cac 100644
--- a/public/react/src/common/TextUtil.js
+++ b/public/react/src/common/TextUtil.js
@@ -6,7 +6,7 @@ export function isImageExtension(fileName) {
 export function markdownToHTML(oldContent, selector) {
     window.$('#md_div').html('')
     // markdown to html
-    if (selector && oldContent && oldContent.startsWith('<p>')) {  // 普通html处理
+    if (selector && oldContent && oldContent.startsWith('<p')) {  // 普通html处理
         window.$(selector).html(oldContent)
     } else {
         try {    
diff --git a/public/react/src/modules/courses/busyWork/CommonWorkQuestion.js b/public/react/src/modules/courses/busyWork/CommonWorkQuestion.js
index 7932311b1..49f1e5158 100644
--- a/public/react/src/modules/courses/busyWork/CommonWorkQuestion.js
+++ b/public/react/src/modules/courses/busyWork/CommonWorkQuestion.js
@@ -87,7 +87,7 @@ class CommonWorkQuestion extends Component{
         
         {/* 内容区 */}
         <div className="padding40 memoContent new_li">
-          <MarkdownToHtml content={description}></MarkdownToHtml>
+          <MarkdownToHtml content={description} selector="work_content"></MarkdownToHtml>
 
           { attachments && attachments.map((item) => {
             return ( <div className="color-grey">
diff --git a/public/react/src/modules/user/account/AccountBasicEdit.js b/public/react/src/modules/user/account/AccountBasicEdit.js
index 4a2fd97f1..a4637c00e 100644
--- a/public/react/src/modules/user/account/AccountBasicEdit.js
+++ b/public/react/src/modules/user/account/AccountBasicEdit.js
@@ -402,6 +402,7 @@ class AccountBasic extends Component {
       filterDepartments,
       school,
       school_id,
+      departments,
       departmentsName,
       identity
     }=this.state;
@@ -718,7 +719,9 @@ class AccountBasic extends Component {
             </Form.Item>
               
               {
-                (!filterDepartments || (filterDepartments && filterDepartments.length==0 ) || (departmentsName == '' && !this.state.department_id))  && 
+                (!filterDepartments || (filterDepartments && filterDepartments.length==0 ) 
+                    || (departmentsName == '' && !this.state.department_id 
+                        && (!departments || departments.length == 0) ))  && 
                 <div style={{marginLeft: '113px',height:"20px",lineHeight:"20px"}}>
                   <span>
                     <span style={{color: '#CDCDCD'}}>{departmentsName ? `未找到包含“${departmentsName}”的院系/部门` : '未找到院系'}，</span>