diff --git a/README.md b/README.md
index 1da00c1..98f6928 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
-EnglishPal - Learn English Words Smartly
-==========================================
+# EnglishPal - Learn English Words Smartly
+
 
 
 Hui Lan <hui.lan@cantab.net>
@@ -7,23 +7,23 @@ Hui Lan <hui.lan@cantab.net>
 1 November 2019
 
 
-What is it?
------------------
+## What is it?
+
 
 EnglishPal allows the user to build his list of new English words
 picked from articles selected for him according his vocabulary level.
 
 
-Run it on a local machine
--------------------------
+## Run it on a local machine
+
 
 `python3 main.py`
 
 Make sure you have the SQLite database file in `app/static` (see below).
 
 
-Run it as a Docker container
-----------------------------
+## Run it as a Docker container
+
 
 Assuming that docker has been installed and that you are a sudo user (i.e., sudoer), start the program by typing the following command in directory `EnglishPal`:
 
@@ -31,8 +31,7 @@ Assuming that docker has been installed and that you are a sudo user (i.e., sudo
 
 Open your favourite Internet browser and enter this URL address: `http://ip-address:90`.
 
-Explanation on the commands in build.sh
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+### Explanation on the commands in build.sh
 
 My steps for deploying English on the server.
 
@@ -49,8 +48,7 @@ My steps for deploying English on the server.
 - Save space: `sudo docker system prune -a -f`
 
 
-Other useful docker commands
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+### Other useful docker commands
 
 - `sudo docker ps -a`
 
@@ -60,20 +58,17 @@ Other useful docker commands
 
 
 
-Update articles
----------------
+## Importing articles
+
 
 All articles are stored in the `article` table in a SQLite file called
 `app/static/wordfreqapp.db`.
 
-Adding new articles
-~~~~~~~~~~~~~~~~~~~~~
-
+### Adding new articles
 
 To add articles, open and edit `app/static/wordfreqapp.db` using DB Browser for SQLite (https://sqlitebrowser.org).
 
-Exporting the database
-~~~~~~~~~~~~~~~~~~~~~~~~
+### Exporting the database
 
 Export wordfreqapp.db to wordfreqapp.sql using the following commands:
 
@@ -87,32 +82,33 @@ Export wordfreqapp.db to wordfreqapp.sql using the following commands:
 
 Put wordfreqapp.sql (not wordfreqapp.db) under version control.
 
-Creating SQLite file from wordfreqapp.sql
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+### Creating SQLite file from wordfreqapp.sql
+
 
 Create wordfreqapp.db using this command: `cat wordfreqapp.sql |
 sqlite3 wordfreqapp.db`.  Delete wordfreqapp.db first if it exists.
 
-Uploading wordfreqapp.db
-~~~~~~~~~~~~~~~~~~~~~~~~~
+
+### Uploading wordfreqapp.db to the server
+
 
 `pscp wordfreqapp.db lanhui@118.*.*.118:/home/lanhui/englishpal/app/static`
 
 
 
-Feedback
----------------------
+## Feedback
 
+We welcome feedback on EnglishPal.
+
+### Respondent 1
 
-Respondent 1
-~~~~~~~~~~~~~
 
 "Need a phone app.  I use phone a lot.  You cannot ask students to use computers."
 
 Can take a picture for text.  Automatic translation.
 
-Respondent 2
-~~~~~~~~~~~~
+### Respondent 2
+
 
 “成为会员”改成“注册”
 
@@ -126,26 +122,26 @@ Respondent 2
 
 
 
-Bug tracking
--------------------
+## Bug tracking
+
 
 EnglishPal's bugs and improvement suggestions are recorded in [Bugzilla](http://118.25.96.118/bugzilla/buglist.cgi?bug_status=__all__&list_id=1302&order=Importance&product=EnglishPal&query_format=specific).  Send (lanhui at zjnu.edu.cn) an email message for opening a Bugzilla account or reporting a bug.
 
 
 
-TODO
-----------
+## TODO
+
 
 - Fix Bug: Internal server error when register using an email address.
 
 - Usability testing
 
 
-Improvements made by contributors
------------------------------------
+## Improvements made by contributors
+
+
+### 朱文绮
 
-朱文绮
-~~~~~~~~~
 
 在生词簿每个单词后面，加上两个按钮，熟悉与不熟悉:
 
@@ -153,8 +149,8 @@ Improvements made by contributors
 
 - 如果点不熟悉，就将生词簿中该单词后面记录的添加次数加一。
 
-李康恬
-~~~~~~~~~~~
+### 李康恬
+
 
 Add the function of "Delete already known and well-known words from
 the words' library", on the one hand, it can conform to the usage
@@ -166,8 +162,8 @@ can also improve the simplicity of the page.
 More information at: http://118.25.96.118/kanboard/?controller=TaskViewController&action=readonly&task_id=736&token=81a561da57ff7a172da17a480f0d421ff3bc69efbd29437daef90b1b8959
 
 
-占健豪
-~~~~~~~~
+### 占健豪
+
 
 Click the Familiar or Unfamiliar button (current word frequency>1), the current word position is displayed at the top of the page;
 
@@ -175,8 +171,8 @@ Click the Familiar or Unfamiliar button (current word frequency is 1), and the p
 
 Demo video link: https://b23.tv/QuB77m
 
-张小飞
-~~~~~~~~~~~~
+### 张小飞
+
 
 修复了以下漏洞。