diff --git a/app/static/js/word_operation.js b/app/static/js/word_operation.js
index dcf38ff..944f0e8 100644
--- a/app/static/js/word_operation.js
+++ b/app/static/js/word_operation.js
@@ -95,13 +95,12 @@ function parseWord(element) {
 function wordTemplate(word) {
     // 这个模板应当与 templates/userpage_get.html 中的 <p id='p_${word.word}' class="new-word" > ... </p> 保持一致
     return `<p id='p_${word.word}' class="new-word" >
-        <a id="word_${word.word}"  class="btn btn-light" href='http://youdao.com/w/eng/${word.word}/#keyfrom=dict2.index'
-           role="button">${word.word}</a>
-        ( <a id="freq_${word.word}" title="${word.word}">${word.freq}</a> )
-        <a class="btn btn-success" onclick="familiar('${word.word}')" role="button">熟悉</a>
-        <a class="btn btn-warning" onclick="unfamiliar('${word.word}')" role="button">不熟悉</a>
-        <a class="btn btn-danger" onclick="delete_word('${word.word}')" role="button">删除</a>
-        <a class="btn btn-info" onclick="read_word('${word.word}')" role="button">朗读</a>
+         <img src="https://s2.loli.net/2024/07/02/6YNpMX7oPzWUhOZ.png" width="50" height="50"  onclick="familiar('${word.word}')"  title='熟悉'>
+         <img src="https://s2.loli.net/2024/07/02/H4NeYAjhup6bs9m.png" width="50" height="50"  onclick="unfamiliar('${word.word}')"  title='不熟悉'>
+         <a id="word_${word.word}"  class="btn btn-light" href='http://youdao.com/w/eng/${word.word}/#keyfrom=dict2.index'
+         role="button"><strong>${word.word}</strong></a>
+         (<a id="freq_${word.word}" title="${word.word}">${word.freq}</a> )
+         <img src="https://s2.loli.net/2024/07/03/5edBC3y7QhIZLTY.jpg" width="30" height="30"  onclick="read_word('${word.word}')" title='朗读'>
     </p>`;
 }
 
diff --git a/app/static/pic/laba.png b/app/static/pic/laba.png
new file mode 100644
index 0000000..6628bb3
Binary files /dev/null and b/app/static/pic/laba.png differ
diff --git a/app/static/wordfreqapp.db b/app/static/wordfreqapp.db
new file mode 100644
index 0000000..8b60cb9
Binary files /dev/null and b/app/static/wordfreqapp.db differ
diff --git a/app/templates/mainpage_get.html b/app/templates/mainpage_get.html
index 2a9b8e3..9da9aa2 100644
--- a/app/templates/mainpage_get.html
+++ b/app/templates/mainpage_get.html
@@ -44,7 +44,9 @@
                 <a href="http://youdao.com/w/eng/{{x[0]}}/#keyfrom=dict2.index">{{x[0]}}</a> {{x[1]}}
             {% endfor %}
         {% endif %}
+
         <p class="text-muted">Version: 20240618</p>
+
         <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/js/bootstrap.bundle.min.js" integrity="sha384-MrcW6ZMFYlzcLA8Nl+NtUVF0sA7MsXsP1UyJoMp4YLEuNSfAP+JcXn/tWtIaxVXM" crossorigin="anonymous"></script>
     </div>
     {{ yml['footer'] | safe }}
diff --git a/app/templates/userpage_get.html b/app/templates/userpage_get.html
index e5c8d95..6fab7a5 100644
--- a/app/templates/userpage_get.html
+++ b/app/templates/userpage_get.html
@@ -153,13 +153,12 @@
                 {% if session.get('thisWord') == x[0] and session.get('time') == 1 %}
                 {% endif %}
                 <p id='p_{{ word }}' class="new-word" >
+                    <img src="https://s2.loli.net/2024/07/02/6YNpMX7oPzWUhOZ.png" width="50" height="50"  onclick="familiar('{{ word }}')" title='熟悉'>
+                    <img src="https://s2.loli.net/2024/07/02/H4NeYAjhup6bs9m.png" width="50" height="50"  onclick="unfamiliar('{{ word }}')" title='不熟悉'>
                     <a id="word_{{ word }}"  class="btn btn-light" href='http://youdao.com/w/eng/{{ word }}/#keyfrom=dict2.index'
-                    role="button">{{ word }}</a>
+                    role="button"><strong>{{ word }}</strong></a>
                     ( <a id="freq_{{ word }}" title="{{ word }}">{{ freq }}</a> )
-                    <a class="btn btn-success" onclick="familiar('{{ word }}')" role="button">熟悉</a>
-                    <a class="btn btn-warning" onclick="unfamiliar('{{ word }}')" role="button">不熟悉</a>
-                    <a class="btn btn-danger" onclick="delete_word('{{ word }}')" role="button">删除</a>
-                    <a class="btn btn-info" onclick="read_word('{{ word }}')" role="button">朗读</a>
+                    <img src="https://s2.loli.net/2024/07/03/5edBC3y7QhIZLTY.jpg" width="30" height="30"  onclick="read_word('{{ word }}')" title='朗读'>
                 </p>
             {% endfor %}
         </div>
diff --git a/app/test/test_next_article.py b/app/test/test_next_article.py
new file mode 100644
index 0000000..3e470de
--- /dev/null
+++ b/app/test/test_next_article.py
@@ -0,0 +1,85 @@
+''' Contributed by Lin Junhong et al. 2023-06.'''
+
+from selenium import webdriver
+from selenium.webdriver.common.desired_capabilities import DesiredCapabilities
+
+from selenium.webdriver.support.ui import WebDriverWait
+from selenium.webdriver.support import expected_conditions as EC
+from selenium.common.exceptions import UnexpectedAlertPresentException, NoAlertPresentException
+import random, time
+import string
+
+# 初始化webdriver
+# driver = webdriver.Remote('http://localhost:4444/wd/hub', DesiredCapabilities.CHROME)
+# driver.implicitly_wait(10)
+driver = webdriver.Chrome("C:\\Users\\12993\AppData\Local\Programs\Python\Python38\\chromedriver.exe")
+
+
+def test_next_article():
+    try:
+        driver.get("http://118.25.96.118:90")
+        assert 'English Pal -' in driver.page_source
+        # login
+        elem = driver.find_element_by_link_text('登录')
+        elem.click()
+
+        uname = 'abcdefg'
+        password = 'abcdefg'
+        elem = driver.find_element_by_id('username')
+        elem.send_keys(uname)
+
+        elem = driver.find_element_by_id('password')
+        elem.send_keys(password)
+        elem = driver.find_element_by_xpath('/html/body/div/button')  # 找到登录按钮
+        elem.click()
+
+        time.sleep(0.5)
+        assert 'EnglishPal Study Room for ' + uname in driver.title
+        for i in range(50):
+            time.sleep(0.1)
+            # 找到固定按钮
+            elem = driver.find_element_by_xpath('//*[@id="load_next_article"]')
+            elem.click()
+    except Exception as e:
+        print(e)
+
+
+def test_local_next_article():
+    try:
+        driver.get("http://127.0.0.1:5000")
+        assert 'English Pal -' in driver.page_source
+        # login
+        elem = driver.find_element_by_link_text('注册')
+        elem.click()
+
+        uname = 'abcdefg'
+        password = 'abcdefg'
+        elem = driver.find_element_by_id('username')
+        elem.send_keys(uname)
+
+        elem = driver.find_element_by_id('password')
+        elem.send_keys(password)
+
+        elem = driver.find_element_by_id('password2')
+        elem.send_keys(password)
+
+        time.sleep(0.5)
+
+        elem = driver.find_element_by_class_name('btn')  # 找到提交按钮
+        elem.click()
+        time.sleep(0.5)
+        try:
+            WebDriverWait(driver, 1).until(EC.alert_is_present())
+            driver.switch_to.alert.accept()
+        except (UnexpectedAlertPresentException, NoAlertPresentException):
+            pass
+
+        time.sleep(0.5)
+        assert 'EnglishPal Study Room for ' + uname in driver.title
+        for i in range(50):
+            time.sleep(0.1)
+            # 找到固定按钮
+            elem = driver.find_element_by_xpath('//*[@id="load_next_article"]')
+            elem.click()
+    except Exception as e:
+        print(e)
diff --git a/da b/da
new file mode 100644
index 0000000..0ff8001
--- /dev/null
+++ b/da
@@ -0,0 +1,391 @@
+commit 8cbc7c9a0ce543db48f80a743c4168ca847ca500 (HEAD -> Alpha-snapshot20240618, origin/master, origin/HEAD, master)
+Author: lisinan <1299311192@qq.com>
+Date:   Fri May 24 22:00:08 2024 +0800
+
+    修复快速点击下一页按钮点击频率过快时页面跳转到未知名页面
+
+commit ff6286cf01bccdda793ec626c66594e43d81cb16 (origin/547, origin/542)
+Author: 丁晟晔 <759539128@qq.com>
+Date:   Mon May 6 11:42:32 2024 +0800
+
+    删除 app/test/test_bug551_DingZeYu.py
+
+commit 1d7e61d7519342396bec9c64cdd8090c1515cec7
+Author: 丁晟晔 <759539128@qq.com>
+Date:   Mon May 6 11:36:36 2024 +0800
+
+    上传文件至 app/test
+
+commit 708a6a282102c2b60e3abfade633389bc1f03ddb (origin/Bosh)
+Merge: 43c719b 688a198
+Author: 顾涵 <1554137355@qq.com>
+Date:   Sun Jun 4 12:39:34 2023 +0800
+
+    Merge pull request 'WIP：Bug529-GuHan' (#88) from Bug529-GuHan into master
+    
+    Reviewed-on: http://121.4.94.30:3000/mrlan/EnglishPal/pulls/88
+
+commit 688a19876823e818f3f312f865f4921f28f28c53 (origin/Bug529-GuHan)
+Merge: 030b897 1543b30
+Author: ghaa0920 <1554137355@qq.com>
+Date:   Sun May 28 16:31:12 2023 +0800
+
+     已经与Alpha-snapshot20230525 分支同步，重新提交
+
+commit 1543b3095dde2a295293af1ea7e495d6ba005f8d (origin/Refactor-XunYucan, origin/Alpha-snapshot20230525)
+Merge: c6bf323 b41e104
+Author: Xunflash <xunflash@qq.com>
+Date:   Thu May 25 22:30:06 2023 +0800
+
+    Merge remote-tracking branch 'origin/Alpha-snapshot20230519' into Refactor-XunYucan
+
+commit c6bf323c6084255abcde0c47ae1a0504bd372475
+Author: Xunflash <xunflash@qq.com>
+Date:   Thu May 25 21:23:25 2023 +0800
+
+    修改格式
+
+commit 03ccb3527a94a3c463b4bffe24ba0f579f286d5f
+Author: Xunflash <xunflash@qq.com>
+Date:   Thu May 25 17:35:31 2023 +0800
+
+    重构前端阅读js，新增阅读器全局对象，新增生词朗读按钮
+
+commit b41e1044bce3e4d9169b7743ce9aad74c0fec7d7 (origin/Alpha-snapshot20230519)
+Author: Hui Lan <lanhui@zjnu.edu.cn>
+Date:   Wed May 24 10:12:44 2023 +0800
+
+    difficulty.py: add some stop words, hoping that getting the next article can be faster.
+
+commit 67e921ba60df76640005fa2838d80808b311bc2d
+Author: Hui Lan <lanhui@zjnu.edu.cn>
+Date:   Tue May 23 22:25:40 2023 +0800
+
+    difficulty.py: todo.
+
+commit a5c3564f15cea5ddb5f79ba15bf888a332698440
+Author: Hui Lan <lanhui@zjnu.edu.cn>
+Date:   Tue May 23 22:22:57 2023 +0800
+
+    difficulty.py: do not stem a word twice.
+
+commit 1295616d5be485475b06e456458a3b8b7a092a50
+Merge: 3494881 c151a0e
+Author: Hui Lan <lanhui@zjnu.edu.cn>
+Date:   Tue May 23 19:50:30 2023 +0800
+
+    Merge branch 'Bug476-YuHuangtao' of http://121.4.94.30:3000/mrlan/EnglishPal into Alpha-snapshot20230519
+
+commit c151a0efaa109aa806c40105cb86d1b3950458ea (origin/Bug476-YuHuangtao)
+Author: PlutoCtx <chentingxian195467@163.com>
+Date:   Tue May 23 19:40:33 2023 +0800
+
+    去掉了get_difficulty_level_for_user的多出的break
+
+commit 030b89706e51a35d95eb6eafa7ae2b2fefac821b
+Author: ghaa0920 <1554137355@qq.com>
+Date:   Sat May 20 15:29:12 2023 +0800
+
+    special_characters = '\_©~<=>+/[]*&$%^@.,?!:;#()"“”—‘’{}|' 用于过滤字符，我将其中的“-”删去，使连字符没有被过滤，实现录入例如fifty-six等组合词的功能。另外对于删除过滤是否会引发字符bug，答案是肯定的，但是这段代码中的过滤字符虽然多，但是并没有完全过滤掉所有字符，（过滤的只是键盘上能打出的字符，不包括输入法中能打出的特殊字符），所以字符bug本身就一直存在，我认为减少一个“-”字符对程序的过滤过程不会造成问题。
+
+commit 349488167b3c1cbdf6116adff5798cf356d94af2
+Author: Hui Lan <lanhui@zjnu.edu.cn>
+Date:   Fri May 19 09:03:20 2023 +0800
+
+    requirements.txt: install snowballstemmer for better computing a word's difficulty level.
+
+commit 39d96014d90892faf22b0830ad8d78aeaaa66d96
+Author: PlutoCtx <chentingxian195467@163.com>
+Date:   Thu May 18 23:29:38 2023 +0800
+
+    pull最新的snapshot-20230511，后更新了difficulty.py和Article.py的部分代码，提交了新的pickle文件
+
+commit acd8db6e3e1c498650f2e8cc3021828e6132e823
+Author: ghaa0920 <1554137355@qq.com>
+Date:   Mon May 15 19:24:43 2023 +0800
+
+    special_characters = '\_©~<=>+/[]*&$%^@.,?!:;#()"“”—‘’{}|' 用于过滤字符，我将其中的“-”删去，使连字符没有被过滤，实现录入例如fifty-six等组合词的功能。另外对于删除过滤是否会引发字符bug，答案是肯定的，但是这段代码中的过滤字符虽然多，但是并没有完全过滤掉所有字符，（过滤的只是键盘上能打出的字符，不包括输入法中能打出的特殊字符），所以字符bug本身就一直存在，我认为减少一个对“1-”字符的过滤不会造成问题。
+
+commit 9f3f5b43e1bc79e884091593b9b8f3d6a2164ea5
+Author: ghaa0920 <1554137355@qq.com>
+Date:   Mon May 15 19:15:30 2023 +0800
+
+    special_characters = '\_©~<=>+/[]*&$%^@.,?!:;#()"“”—‘’{}|' 用于过滤字符，我将其中的“-”删去，使连字符没有被过滤，实现录入例如fifty-six等组合词的功能。另外对于删除过滤是否会引发字符bug，答案是肯定的，但是这段代码中的过滤字符虽然多，但是并没有完全过滤掉所有字符，（过滤的只是键盘上能打出的字符，不包括输入法中能打出的特殊字符），所以字符bug本身就一直存在，我认为减少一个对“-”字符的过滤不会造成问题。
+
+commit d9f6df7fbe585395a19b9a08c411d841b6b89fd4 (origin/Bug532-HuangDan)
+Author: huangdan <2741654266@qq.com>
+Date:   Thu May 11 15:51:10 2023 +0800
+
+    AJAX载入文章数据
+
+commit 5039f5710e4575ecbd9c5bfcc2e349dbe6025bfa (origin/Alpha-snapshot20230507)
+Author: huangdan <2741654266@qq.com>
+Date:   Mon May 8 14:33:48 2023 +0800
+
+    AJAX载入文章数据
+
+commit becef7e3436c93561ba581cff9b9ca9da118c888 (origin/Alpha-snapshot20230506)
+Merge: a4cc4fd 01ecc83
+Author: Hui Lan <lanhui@zjnu.edu.cn>
+Date:   Sun May 7 15:59:35 2023 +0800
+
+    Merge branch 'Bug502-YuGaoXiang' of http://121.4.94.30:3000/mrlan/EnglishPal into Alpha-snapshot20230506
+
+commit 01ecc8376893404cb026e34e7f8fecbefcd082cf (origin/Bug502-YuGaoXiang)
+Author: Awoodwhale <woodwhale@qq.com>
+Date:   Sat May 6 17:42:04 2023 +0800
+
+    refactor: refactor the way to check article level
+
+commit f64d06fbbf00255fc21f141d852d8995e588785e
+Author: Awoodwhale <woodwhale@qq.com>
+Date:   Sat May 6 17:24:51 2023 +0800
+
+    fix: fix Bug 531 and use ES6 grammar
+
+commit a4cc4fd011317f3daec2de456b95abca16841663
+Merge: 779dafe 18ca48b
+Author: Hui Lan <lanhui@zjnu.edu.cn>
+Date:   Sat May 6 17:16:08 2023 +0800
+
+    Merge branch 'Bug522-HuangZirui' of http://121.4.94.30:3000/mrlan/EnglishPal into Alpha-snapshot20230506
+
+commit 18ca48b42214720f411937b01c20550a5f96580b
+Merge: a80b062 ce2e1f2
+Author: ZhuZhihao <1287365321@qq.com>
+Date:   Fri May 5 17:21:49 2023 +0800
+
+    Merge branch 'Bug522-HuangZirui' of http://121.4.94.30:3000/mrlan/EnglishPal into Bug522-HuangZirui
+
+commit a80b062b8707fb6a73554b8500b8c5ae17775ed3
+Author: ZhuZhihao <1287365321@qq.com>
+Date:   Fri May 5 17:20:58 2023 +0800
+
+    refactor: remove variable 'count'
+
+commit 779dafefe8a3ae5c40b3376d2b0309c0ddcd3273 (origin/Alpha-snapshot20230427)
+Merge: e118d92 d30a434
+Author: Hui Lan <lanhui@zjnu.edu.cn>
+Date:   Thu Apr 27 07:21:15 2023 +0800
+
+    Merge branch 'Bug509-XieQiuHan-WangZiming' of http://121.4.94.30:3000/mrlan/EnglishPal into Alpha-snapshot20230427
+
+commit e118d92659911db4f3bd047a67865522c8b00c66
+Merge: ce2e1f2 5654fbf
+Author: Hui Lan <lanhui@zjnu.edu.cn>
+Date:   Thu Apr 27 07:20:21 2023 +0800
+
+    Merge branch 'Alpha-snapshot20230425' of http://121.4.94.30:3000/mrlan/EnglishPal into Alpha-snapshot20230427
+
+commit 5654fbf9bc3ae85eec621a4e6e2ecd1f6c6c3b30 (origin/Alpha-snapshot20230425)
+Author: 一问三不知 <178428409@qq.com>
+Date:   Wed Apr 26 18:49:59 2023 +0800
+
+    修改：使用新的/<username>/userpage路由
+
+commit d30a434b2a0dce5247bb005c5c245529d5a542d4 (origin/Bug509-XieQiuHan-WangZiming)
+Author: 一问三不知 <178428409@qq.com>
+Date:   Tue Apr 25 17:47:51 2023 +0800
+
+    修改变量名had_read_articles->visited_articles
+
+commit b88bc8f36b395f3979d4a9b37993b88b8a9eb658
+Merge: ef78679 6be035f
+Author: Hui Lan <lanhui@zjnu.edu.cn>
+Date:   Tue Apr 25 11:40:42 2023 +0800
+
+    Merge branch 'Bug509-XieQiuHan-WangZiming' of http://121.4.94.30:3000/mrlan/EnglishPal into Alpha-snapshot20230425
+
+commit 6be035f2828286b5cd59f15ec04336b86c3cb0fa
+Author: 一问三不知 <178428409@qq.com>
+Date:   Tue Apr 25 11:38:01 2023 +0800
+
+    修复当没有找到文章或者文章读完时，直接刷新页面或者session不关闭重新进入页面，导致的错误；
+
+commit ef786795e27287502b5388e2e80aa83eac596c8d
+Merge: 21a77ef fc3e274
+Author: Hui Lan <lanhui@zjnu.edu.cn>
+Date:   Tue Apr 25 08:47:22 2023 +0800
+
+    Resolve merge conflict
+
+commit 21a77ef2df5111ca4fb0103624ee0b68a15b2a06
+Merge: 58d7349 f3d609c
+Author: Hui Lan <lanhui@zjnu.edu.cn>
+Date:   Tue Apr 25 08:42:18 2023 +0800
+
+    Merge branch 'Alpha' of http://121.4.94.30:3000/mrlan/EnglishPal into Alpha
+
+commit 58d7349afe69c5934754cb7a5145b33382326c37
+Author: Hui Lan <lanhui@zjnu.edu.cn>
+Date:   Tue Apr 25 08:40:26 2023 +0800
+
+    Change from bug359-zhangkeli
+
+commit fc3e27488b3b55c1013a970e6abb95b88caff9aa
+Author: 一问三不知 <178428409@qq.com>
+Date:   Fri Apr 21 05:33:26 2023 +0800
+
+    给标签添加id，方便测试
+
+commit 03145b57d98c29ae04948281e8e4e67512e75829
+Author: 一问三不知 <178428409@qq.com>
+Date:   Fri Apr 21 02:36:51 2023 +0800
+
+    修复边界值问题（当刚开始就没有找到文章或者就根本被没有文章的时候，会出现上一篇按钮）
+
+commit 70917df47b91f7fbb16870b15f2a2ecdbdad6135
+Author: 一问三不知 <178428409@qq.com>
+Date:   Thu Apr 20 23:15:12 2023 +0800
+
+    删除测试代码
+
+commit 8f132ed87bfc00e321214dd4a4d6ed2a3ff4a8cd
+Author: 一问三不知 <178428409@qq.com>
+Date:   Thu Apr 20 22:53:30 2023 +0800
+
+    添加了阅读完所有文章的提示
+
+commit da13e5bbd5da2a1ceb838c5a4836a0cabd8bdf69
+Author: 一问三不知 <178428409@qq.com>
+Date:   Thu Apr 20 21:28:29 2023 +0800
+
+    修复Bug（没找到文章后立即上一篇会回到上上篇文章） & 标签添加id方便测试
+
+commit 84affaeb69fdecb155cdf4daa4f57c4b29dbea55
+Author: 一问三不知 <178428409@qq.com>
+Date:   Thu Apr 20 20:30:14 2023 +0800
+
+    修改 /<username> 路由存在的问题（每次调用别的路由他都会被调用），新路由为 /<username>/userpage;同时因为修改了路由导致访问userpage_get的时候会导致静态文件路径生成错误，这里修改了\static\config.yml中的静态资源路径，修改后也都可以正常访问到的
+
+commit 16de0a7fd99a26d331e23eac7c1fd22594b7c50f
+Author: 一问三不知 <178428409@qq.com>
+Date:   Thu Apr 20 15:40:11 2023 +0800
+
+     修改变量命名：existing_articles → had_read_articles
+
+commit ce2e1f2978e68aac46a03e0d7bc5e27b78a1106a (origin/Alpha-snapshot20230426)
+Merge: 11ae093 cc8ca47
+Author: zzhaofisher <10839192+zzhaofisher@user.noreply.gitee.com>
+Date:   Tue Apr 18 21:52:28 2023 +0800
+
+    Merge branch 'DevLocal' into Bug522-HuangZirui
+
+commit 11ae093fd7b714b37bd26f42ad9f5b042ae1dfc1
+Merge: 3bce450 f3d609c
+Author: zzhaofisher <10839192+zzhaofisher@user.noreply.gitee.com>
+Date:   Tue Apr 18 21:52:01 2023 +0800
+
+    Merge branch 'Alpha' into Bug522-HuangZirui
+
+commit cc8ca47f8c96eedaf2ce7ec61f5480123663953f
+Author: zzhaofisher <10839192+zzhaofisher@user.noreply.gitee.com>
+Date:   Tue Apr 18 21:50:54 2023 +0800
+
+    refactor: remove sql sentences
+
+commit 5d20e92061d3c43dab01e0ca9483779fc9b9a9a2
+Merge: f3d609c 3bce450
+Author: zzhaofisher <10839192+zzhaofisher@user.noreply.gitee.com>
+Date:   Tue Apr 18 21:50:18 2023 +0800
+
+    Merge branch 'Bug522-HuangZirui' of http://121.4.94.30:3000/mrlan/EnglishPal into DevLocal
+
+commit f3d609c92bfd27ed4ef70cab838a7d1362a5fb6b (origin/Alpha)
+Merge: 688ed72 15bb925
+Author: Lan Hui <1348141770@qq.com>
+Date:   Fri Apr 7 06:41:49 2023 +0800
+
+    Merge Wang Ziming's work and Wu Yuhan's work.
+
+commit 15bb9250248aa6feb249be72c53d3fa6d7005d52
+Author: 一问三不知 <178428409@qq.com>
+Date:   Tue Apr 4 22:31:53 2023 +0800
+
+    将记录阅读过文章的数据结果改为字典，以及修改了flag的问题
+
+commit 688ed724734fddb4a07e9dd0dc5b6b2ace16e645
+Author: Lan Hui <1348141770@qq.com>
+Date:   Sat Apr 1 16:07:59 2023 +0800
+
+    Correct grammar。
+
+commit 1f150fc847d0fc70947261ff45843ccc116117c2
+Author: Awoodwhale <woodwhale@qq.com>
+Date:   Fri Mar 31 13:39:28 2023 +0800
+
+    refactor: use ajax to get expiry_date
+
+commit 7107f634c2ec9fa12dd6bcbed9f4ee5c339928c7
+Merge: 6f1dd13 4417cf7
+Author: 一问三不知 <178428409@qq.com>
+Date:   Fri Mar 31 04:58:21 2023 +0800
+
+    Merge branch 'test' into dev-fixBug509-reconstruction
+
+commit 6f1dd134193cb3f9fa1d3502b286d3be1f22c1ed
+Author: 一问三不知 <178428409@qq.com>
+Date:   Fri Mar 31 04:50:41 2023 +0800
+
+    测试的print忘删了
+
+commit 4417cf7017d50f20d99e1a274b48ad5d3b32e8e6
+Author: Hui Lan <lanhui@zjnu.edu.cn>
+Date:   Thu Mar 30 16:10:22 2023 +0800
+
+    Article.py: remove debug statement.
+
+commit 0c16a4dc6f21849915cdad92c7189e37ccb9a289
+Author: 一问三不知 <178428409@qq.com>
+Date:   Wed Mar 29 20:53:38 2023 +0800
+
+    判断文章是否已经出现的语句写错位置了，改正下
+
+commit 5b2f5199a82be7cdb7bb3ac57f7b54b5ea0f4034
+Author: 一问三不知 <178428409@qq.com>
+Date:   Mon Mar 27 14:28:54 2023 +0800
+
+    1. 取消userpage_get.html中提示删除单词信息的代码 和 取消user_service.userpage中render_template的flashed_messages参数。因为删除单词操作已经是异步了，而提示信息的出现是同步执行，所以就注释了代码且没有产生太大影响。
+    2. 修改取消user_service.deleteword中对注释flash代码的注释，根据上一步进行了重新解释。
+
+commit 0ce1c6eb6e5707ccfb47113b2c58c9961f2eae48
+Author: Lan Hui <1348141770@qq.com>
+Date:   Sun Mar 26 21:14:29 2023 +0800
+
+    文章管理页面：每篇文章中保留换行，方便查看。
+
+commit d4ac7093859d400f77f24c7cf5b6d39dd67b2e9a
+Author: Lan Hui <1348141770@qq.com>
+Date:   Sun Mar 26 21:05:05 2023 +0800
+
+    将删除按钮移到第一行，避免因为文章的标题过长跨行导致删除按钮形状改变。
+
+commit 9eb5210d3f11211abe756597518d09b1cfd8f3e4
+Author: Lan Hui <1348141770@qq.com>
+Date:   Sun Mar 26 20:58:37 2023 +0800
+
+    Level与Date的冒号后面加个空格，使得后面的信息更加看得清楚。
+
+commit 0e257373816ee365d41e78b0b13ba807e0230aac
+Author: Lan Hui <1348141770@qq.com>
+Date:   Sun Mar 26 20:56:08 2023 +0800
+
+    管理文章页面的文章列表中，每篇文章不再在内容部分重新显示标题。
+
+commit b3b154a24f9bb267146712e6020903a6e574c976
+Author: Lan Hui <1348141770@qq.com>
+Date:   Sun Mar 26 19:06:04 2023 +0800
+
+    简化管理文章与管理用户页面信息。
+
+commit 4d99405bfaf2f87abdf4bfa1291083419c6df502
+Author: Lan Hui <1348141770@qq.com>
+Date:   Sun Mar 26 18:59:15 2023 +0800
+
+    简化管理员页面信息。删除退出登录按钮，可以返回到前一页后再退出，不影响使用体验。删除'管理员您好'欢迎词，没啥意义。
+
+commit 8d8b9197b614b595bbba1ecf95c189ea1389780c
+Author: Lan Hui <1348141770@qq.com>
+Date:   Sun Mar 26 09:59:06 2023 +0800
+
+    手动输入的文字最高难度等级是4
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