diff --git a/public/react/src/modules/courses/graduation/tasks/GraduationTasksappraise.js b/public/react/src/modules/courses/graduation/tasks/GraduationTasksappraise.js
index 374318af1..a45a105fd 100644
--- a/public/react/src/modules/courses/graduation/tasks/GraduationTasksappraise.js
+++ b/public/react/src/modules/courses/graduation/tasks/GraduationTasksappraise.js
@@ -1,7 +1,7 @@
 import React,{Component} from "React";
 import { Form, Select, Input, Button,Checkbox,Upload,Icon,message,Modal, Table, Divider, Tag} from "antd";
 import {Link} from 'react-router-dom';
-import { WordsBtn } from 'educoder';
+import { WordsBtn,markdownToHTML } from 'educoder';
 import axios from 'axios';
 import moment from 'moment';
 import Modals from '../../../modals/Modals';
@@ -205,7 +205,7 @@ class GraduationTasksappraise extends Component{
                     </div>
 
                     <div className={"ml20"}>
-                      {datalist&&datalist.description}
+											<div dangerouslySetInnerHTML={{__html: markdownToHTML(datalist&&datalist.description).replace(/▁/g,"▁▁▁")}}></div>
                     </div>
 
                     {/*<div className={"color-grey-6 h20 ml20"}>*/}
diff --git a/public/react/src/modules/courses/graduation/tasks/GraduationTaskssetting.js b/public/react/src/modules/courses/graduation/tasks/GraduationTaskssetting.js
index 9d0b33e80..762fe1406 100644
--- a/public/react/src/modules/courses/graduation/tasks/GraduationTaskssetting.js
+++ b/public/react/src/modules/courses/graduation/tasks/GraduationTaskssetting.js
@@ -111,11 +111,11 @@ class GraduationTaskssettingapp extends Component{
          max_nums: result.data.max_num,
          task_type: result.data.task_type,
          baseonproject: result.data.base_on_project,
-         publish_time:moment(moment(handleDateString(result.data.publish_time))).format("YYYY-MM-DD HH:mm"),
-         end_time:moment(moment(handleDateString(result.data.end_time))).format("YYYY-MM-DD HH:mm"),
+         publish_time:result.data.publish_time===null?"":moment(moment(handleDateString(result.data.publish_time))).format("YYYY-MM-DD HH:mm"),
+         end_time:result.data.end_time===null?"":moment(moment(handleDateString(result.data.end_time))).format("YYYY-MM-DD HH:mm"),
          allowlate: result.data.allow_late,
          latepenalty: result.data.late_penalty,
-         latetime:moment(moment(handleDateString(result.data.late_time))).format("YYYY-MM-DD HH:mm"),
+         latetime:result.data.late_time===null?"":moment(moment(handleDateString(result.data.late_time))).format("YYYY-MM-DD HH:mm"),
          crosscomment: result.data.cross_comment,
          taskid: result.data.id,
          taskname: result.data.task_name,
@@ -128,7 +128,7 @@ class GraduationTaskssettingapp extends Component{
          hasproject: result.data.has_project,
          hascommit: result.data.has_commit,
          assigngroups: assigngroups,
-         commenttime:moment(moment(handleDateString(result.data.comment_time))).format("YYYY-MM-DD HH:mm"),
+         commenttime:result.data.comment_time===null?"":moment(moment(handleDateString(result.data.comment_time))).format("YYYY-MM-DD HH:mm"),
          task_status: result.data.task_status
        })
      }
diff --git a/public/react/src/modules/tpm/shixunchild/Challenges/Challenges.js b/public/react/src/modules/tpm/shixunchild/Challenges/Challenges.js
index c6870c2e9..38584c793 100644
--- a/public/react/src/modules/tpm/shixunchild/Challenges/Challenges.js
+++ b/public/react/src/modules/tpm/shixunchild/Challenges/Challenges.js
@@ -8,7 +8,7 @@ import PropTypes from 'prop-types';
 
 import classNames from 'classnames';
 
-import { getImageUrl } from 'educoder'
+import { getImageUrl ,markdownToHTML} from 'educoder'
 
 import { CircularProgress } from 'material-ui/Progress';
 
@@ -250,9 +250,7 @@ class Challenges extends Component {
                  id="challenge_editorMd_description">
               <p id="ReactMarkdown" style={{overflow:'hidden'}}>
                 {ChallengesDataList === undefined ? "" :ChallengesDataList.description===null?"":
-                  <textarea>
-                                    {ChallengesDataList.description}
-                                  </textarea>
+									<div dangerouslySetInnerHTML={{__html: markdownToHTML(ChallengesDataList.description).replace(/▁/g,"▁▁▁")}}></div>
                 }
               </p>