diff --git a/lib/main.dart b/lib/main.dart
index 1e8fb5c8..aa63e407 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -32,7 +32,7 @@ void main() async {
       Preferences.getString(Constants.PREF_ICON_STYLE_CODE, AppIcon.OUTLINED);
   AppTheme.code =
       Preferences.getString(Constants.PREF_THEME_CODE, AppTheme.LIGHT);
-  if (kIsWeb) {
+  if (kIsWeb || Constants.isInDebugMode) {
   } else if (Platform.isIOS || Platform.isAndroid) {
     Crashlytics.instance.enableInDevMode = true;
     // Pass all uncaught errors from the framework to Crashlytics.
diff --git a/lib/models/announcements_data.dart b/lib/models/announcements_data.dart
index 928f7ffa..2ce8d8ca 100644
--- a/lib/models/announcements_data.dart
+++ b/lib/models/announcements_data.dart
@@ -33,6 +33,7 @@ class Announcements {
   int id;
   int nextId;
   int lastId;
+  int weight;
   String imgUrl;
   String url;
   String description;
@@ -43,6 +44,7 @@ class Announcements {
     this.id,
     this.nextId,
     this.lastId,
+    this.weight,
     this.imgUrl,
     this.url,
     this.description,
@@ -59,6 +61,7 @@ class Announcements {
         id: json["id"],
         nextId: json["nextId"],
         lastId: json["lastId"],
+        weight: json["weight"],
         imgUrl: json["imgUrl"],
         url: json["url"],
         description: json["description"],
@@ -70,6 +73,7 @@ class Announcements {
         "id": id,
         "nextId": nextId,
         "lastId": lastId,
+        "weight": weight,
         "imgUrl": imgUrl,
         "url": url,
         "description": description,
diff --git a/lib/models/semester_data.dart b/lib/models/semester_data.dart
index 50f7e3d5..2e76575e 100644
--- a/lib/models/semester_data.dart
+++ b/lib/models/semester_data.dart
@@ -44,6 +44,8 @@ class Semester {
   String value;
   String text;
 
+  String get code => '$year$value';
+
   Semester({
     this.year,
     this.value,
diff --git a/lib/pages/home/bus/bus_reservations_page.dart b/lib/pages/home/bus/bus_reservations_page.dart
index 7df2ff74..0fcc6735 100644
--- a/lib/pages/home/bus/bus_reservations_page.dart
+++ b/lib/pages/home/bus/bus_reservations_page.dart
@@ -12,7 +12,15 @@ import 'package:nkust_ap/widgets/hint_content.dart';
 import 'package:nkust_ap/widgets/progress_dialog.dart';
 import 'package:nkust_ap/widgets/yes_no_dialog.dart';
 
-enum _State { loading, finish, error, empty, offlineEmpty }
+enum _State {
+  loading,
+  finish,
+  error,
+  empty,
+  campusNotSupport,
+  userNotSupport,
+  offlineEmpty,
+}
 
 class BusReservationsPage extends StatefulWidget {
   static const String routerName = "/bus/reservations";
@@ -68,13 +76,31 @@ class BusReservationsPageState extends State<BusReservationsPage>
     );
   }
 
+  String get errorText {
+    switch (state) {
+      case _State.error:
+        return app.clickToRetry;
+      case _State.empty:
+        return app.busEmpty;
+      case _State.campusNotSupport:
+        return app.campusNotSupport;
+      case _State.userNotSupport:
+        return app.userNotSupport;
+      default:
+        return '';
+    }
+  }
+
   Widget _body() {
     switch (state) {
       case _State.loading:
-        return Container(
-            child: CircularProgressIndicator(), alignment: Alignment.center);
+        return Center(
+          child: CircularProgressIndicator(),
+        );
       case _State.error:
       case _State.empty:
+      case _State.campusNotSupport:
+      case _State.userNotSupport:
         return FlatButton(
           onPressed: () {
             _getBusReservations();
@@ -82,9 +108,7 @@ class BusReservationsPageState extends State<BusReservationsPage>
           },
           child: HintContent(
             icon: AppIcon.assignment,
-            content: state == _State.error
-                ? app.clickToRetry
-                : app.busReservationEmpty,
+            content: errorText,
           ),
         );
       case _State.offlineEmpty:
@@ -231,12 +255,20 @@ class BusReservationsPageState extends State<BusReservationsPage>
         switch (e.type) {
           case DioErrorType.RESPONSE:
             if (e.response.statusCode == 401) {
+              setState(() {
+                state = _State.userNotSupport;
+              });
+            } else if (e.response.statusCode == 403) {
+              setState(() {
+                state = _State.campusNotSupport;
+              });
+            } else {
               setState(() {
                 state = _State.error;
               });
-            } else
               Utils.handleResponseError(
                   context, 'getBusReservations', mounted, e);
+            }
             break;
           case DioErrorType.DEFAULT:
             if (e.message.contains("HttpException")) {
diff --git a/lib/pages/home/bus/bus_reserve_page.dart b/lib/pages/home/bus/bus_reserve_page.dart
index d47fe5a4..7d9e812f 100644
--- a/lib/pages/home/bus/bus_reserve_page.dart
+++ b/lib/pages/home/bus/bus_reserve_page.dart
@@ -13,7 +13,15 @@ import 'package:nkust_ap/widgets/hint_content.dart';
 import 'package:nkust_ap/widgets/progress_dialog.dart';
 import 'package:nkust_ap/widgets/yes_no_dialog.dart';
 
-enum _State { loading, finish, error, empty, offline }
+enum _State {
+  loading,
+  finish,
+  error,
+  empty,
+  campusNotSupport,
+  userNotSupport,
+  offline
+}
 enum Station { janGong, yanchao }
 
 class BusReservePage extends StatefulWidget {
@@ -56,89 +64,92 @@ class BusReservePageState extends State<BusReservePage>
     super.build(context);
     app = AppLocalizations.of(context);
     return Scaffold(
-      body: OrientationBuilder(builder: (_, orientation) {
-        return NestedScrollView(
-          headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) {
-            return <Widget>[
-              SliverAppBar(
-                leading: Container(),
-                expandedHeight: orientation == Orientation.portrait
-                    ? MediaQuery.of(context).size.height * 0.20
-                    : MediaQuery.of(context).size.width * 0.19,
-                floating: true,
-                backgroundColor: Colors.transparent,
-                flexibleSpace: FlexibleSpaceBar(
-                  background: Column(
-                    children: <Widget>[
-                      Container(
-                        color: Colors.transparent,
-                        padding: EdgeInsets.symmetric(
-                            horizontal: 16.0, vertical: 0.0),
-                        child: Calendar(
-                          isExpandable: false,
-                          showTodayAction: false,
-                          showCalendarPickerIcon: true,
-                          showChevronsToChangeRange: true,
-                          onDateSelected: (DateTime datetime) {
-                            dateTime = datetime;
-                            _getBusTimeTables();
-                            FA.logAction('date_select', 'click');
-                          },
-                          initialCalendarDateOverride: dateTime,
-                          dayChildAspectRatio:
-                              orientation == Orientation.portrait ? 1.5 : 3,
-                          weekdays: app.weekdays,
+      body: OrientationBuilder(
+        builder: (_, orientation) {
+          return NestedScrollView(
+            headerSliverBuilder:
+                (BuildContext context, bool innerBoxIsScrolled) {
+              return <Widget>[
+                SliverAppBar(
+                  leading: Container(),
+                  expandedHeight: orientation == Orientation.portrait
+                      ? MediaQuery.of(context).size.height * 0.20
+                      : MediaQuery.of(context).size.width * 0.19,
+                  floating: true,
+                  backgroundColor: Colors.transparent,
+                  flexibleSpace: FlexibleSpaceBar(
+                    background: Column(
+                      children: <Widget>[
+                        Container(
+                          color: Colors.transparent,
+                          padding: EdgeInsets.symmetric(
+                              horizontal: 16.0, vertical: 0.0),
+                          child: Calendar(
+                            isExpandable: false,
+                            showTodayAction: false,
+                            showCalendarPickerIcon: true,
+                            showChevronsToChangeRange: true,
+                            onDateSelected: (DateTime datetime) {
+                              dateTime = datetime;
+                              _getBusTimeTables();
+                              FA.logAction('date_select', 'click');
+                            },
+                            initialCalendarDateOverride: dateTime,
+                            dayChildAspectRatio:
+                                orientation == Orientation.portrait ? 1.5 : 3,
+                            weekdays: app.weekdays,
+                          ),
                         ),
-                      ),
-                      Container(
-                        padding: EdgeInsets.symmetric(horizontal: 16.0),
-                        child: Divider(color: Colors.grey),
-                      ),
-                    ],
+                        Container(
+                          padding: EdgeInsets.symmetric(horizontal: 16.0),
+                          child: Divider(color: Colors.grey),
+                        ),
+                      ],
+                    ),
                   ),
                 ),
-              ),
-            ];
-          },
-          body: Column(
-            children: <Widget>[
-              Container(
-                padding: EdgeInsets.symmetric(vertical: 8.0),
-                child: ConstrainedBox(
-                  constraints: BoxConstraints(minWidth: double.infinity),
-                  child: CupertinoSegmentedControl(
-                    selectedColor: Resource.Colors.blueAccent,
-                    borderColor: Resource.Colors.blueAccent,
-                    unselectedColor: Resource.Colors.segmentControlUnSelect,
-                    groupValue: selectStartStation,
-                    children: {
-                      Station.janGong: Container(
-                        padding: EdgeInsets.symmetric(vertical: 8.0),
-                        child: Text(app.fromJiangong),
-                      ),
-                      Station.yanchao: Container(
-                        padding: EdgeInsets.symmetric(vertical: 8.0),
-                        child: Text(app.fromYanchao),
-                      )
-                    },
-                    onValueChanged: (Station text) {
-                      if (mounted) {
-                        setState(() {
-                          selectStartStation = text;
-                        });
-                      }
-                      FA.logAction('segment', 'click');
-                    },
+              ];
+            },
+            body: Column(
+              children: <Widget>[
+                Container(
+                  padding: EdgeInsets.symmetric(vertical: 8.0),
+                  child: ConstrainedBox(
+                    constraints: BoxConstraints(minWidth: double.infinity),
+                    child: CupertinoSegmentedControl(
+                      selectedColor: Resource.Colors.blueAccent,
+                      borderColor: Resource.Colors.blueAccent,
+                      unselectedColor: Resource.Colors.segmentControlUnSelect,
+                      groupValue: selectStartStation,
+                      children: {
+                        Station.janGong: Container(
+                          padding: EdgeInsets.symmetric(vertical: 8.0),
+                          child: Text(app.fromJiangong),
+                        ),
+                        Station.yanchao: Container(
+                          padding: EdgeInsets.symmetric(vertical: 8.0),
+                          child: Text(app.fromYanchao),
+                        )
+                      },
+                      onValueChanged: (Station text) {
+                        if (mounted) {
+                          setState(() {
+                            selectStartStation = text;
+                          });
+                        }
+                        FA.logAction('segment', 'click');
+                      },
+                    ),
                   ),
                 ),
-              ),
-              Expanded(
-                child: _body(),
-              ),
-            ],
-          ),
-        );
-      }),
+                Expanded(
+                  child: _body(),
+                ),
+              ],
+            ),
+          );
+        },
+      ),
     );
   }
 
@@ -147,6 +158,21 @@ class BusReservePageState extends State<BusReservePage>
       fontSize: 18.0,
       decorationColor: Colors.grey);
 
+  String get errorText {
+    switch (state) {
+      case _State.error:
+        return app.clickToRetry;
+      case _State.empty:
+        return app.busEmpty;
+      case _State.campusNotSupport:
+        return app.campusNotSupport;
+      case _State.userNotSupport:
+        return app.userNotSupport;
+      default:
+        return '';
+    }
+  }
+
   Widget _body() {
     switch (state) {
       case _State.loading:
@@ -154,6 +180,8 @@ class BusReservePageState extends State<BusReservePage>
             child: CircularProgressIndicator(), alignment: Alignment.center);
       case _State.error:
       case _State.empty:
+      case _State.campusNotSupport:
+      case _State.userNotSupport:
         return FlatButton(
           onPressed: () {
             _getBusTimeTables();
@@ -161,7 +189,7 @@ class BusReservePageState extends State<BusReservePage>
           },
           child: HintContent(
             icon: AppIcon.assignment,
-            content: state == _State.error ? app.clickToRetry : app.busEmpty,
+            content: errorText,
           ),
         );
       case _State.offline:
@@ -366,12 +394,20 @@ class BusReservePageState extends State<BusReservePage>
         switch (e.type) {
           case DioErrorType.RESPONSE:
             if (e.response.statusCode == 401) {
+              setState(() {
+                state = _State.userNotSupport;
+              });
+            } else if (e.response.statusCode == 403) {
+              setState(() {
+                state = _State.campusNotSupport;
+              });
+            } else {
               setState(() {
                 state = _State.error;
               });
-            } else
               Utils.handleResponseError(
                   context, 'getBusTimeTables', mounted, e);
+            }
             break;
           case DioErrorType.DEFAULT:
             if (e.message.contains("HttpException")) {
diff --git a/lib/pages/home/leaves/leave_record_page.dart b/lib/pages/home/leaves/leave_record_page.dart
index cf595b52..69486147 100644
--- a/lib/pages/home/leaves/leave_record_page.dart
+++ b/lib/pages/home/leaves/leave_record_page.dart
@@ -280,7 +280,7 @@ class LeaveRecordPageState extends State<LeaveRecordPage>
             state = _State.finish;
           }
         });
-      CacheUtils.saveLeaveData(selectSemester.value, leaveData);
+      CacheUtils.saveLeaveData(selectSemester.code, leaveData);
     }).catchError((e) {
       if (e is DioError) {
         switch (e.type) {
@@ -307,7 +307,7 @@ class LeaveRecordPageState extends State<LeaveRecordPage>
   }
 
   void _loadOfflineLeaveData() async {
-    leaveData = await CacheUtils.loadLeaveData(selectSemester.value);
+    leaveData = await CacheUtils.loadLeaveData(selectSemester.code);
     if (mounted) {
       setState(() {
         isOffline = true;
diff --git a/lib/pages/home/setting_page.dart b/lib/pages/home/setting_page.dart
index 470b2eba..fe4199b7 100644
--- a/lib/pages/home/setting_page.dart
+++ b/lib/pages/home/setting_page.dart
@@ -87,23 +87,16 @@ class SettingPageState extends State<SettingPage> {
               value: busNotify,
               onChanged: (b) async {
                 FA.logAction('notify_bus', 'create');
-                bool bus = Preferences.getBool(Constants.PREF_BUS_ENABLE, true);
-                if (bus) {
-                  setState(() {
-                    busNotify = !busNotify;
-                  });
-                  if (busNotify)
-                    _setupBusNotify(context);
-                  else {
-                    await Utils.cancelBusNotify();
-                  }
-                  Preferences.setBool(Constants.PREF_BUS_NOTIFY, busNotify);
-                  FA.logAction('notify_bus', 'click', message: '$busNotify');
-                } else {
-                  Utils.showToast(context, app.canNotUseFeature);
-                  FA.logAction('notify_bus', 'staus',
-                      message: 'can\'t use feature');
+                setState(() {
+                  busNotify = !busNotify;
+                });
+                if (busNotify)
+                  _setupBusNotify(context);
+                else {
+                  await Utils.cancelBusNotify();
                 }
+                Preferences.setBool(Constants.PREF_BUS_NOTIFY, busNotify);
+                FA.logAction('notify_bus', 'click', message: '$busNotify');
               },
             ),
             Divider(
diff --git a/lib/pages/home/calculate_units_page.dart b/lib/pages/home/study/calculate_units_page.dart
similarity index 100%
rename from lib/pages/home/calculate_units_page.dart
rename to lib/pages/home/study/calculate_units_page.dart
diff --git a/lib/pages/home/course_page.dart b/lib/pages/home/study/course_page.dart
similarity index 96%
rename from lib/pages/home/course_page.dart
rename to lib/pages/home/study/course_page.dart
index 7767931d..c89609a8 100644
--- a/lib/pages/home/course_page.dart
+++ b/lib/pages/home/study/course_page.dart
@@ -74,7 +74,7 @@ class CoursePageState extends State<CoursePage> {
                   });
                   if (Preferences.getBool(
                       Constants.PREF_IS_OFFLINE_LOGIN, false))
-                    _loadCourseData(semester.value);
+                    _loadCourseData(semester.code);
                   else
                     _getCourseTables();
                 },
@@ -278,12 +278,8 @@ class CoursePageState extends State<CoursePage> {
         isOffline = true;
         if (this.courseData == null) {
           state = _State.offlineEmpty;
-        } else if (courseData.status == 204) {
-          state = _State.empty;
-        } else if (courseData.status == 200) {
-          state = _State.finish;
         } else {
-          state = _State.error;
+          state = _State.finish;
         }
       });
     }
@@ -302,7 +298,7 @@ class CoursePageState extends State<CoursePage> {
           } else {
             courseData = response;
             isOffline = false;
-            CacheUtils.saveCourseData(selectSemester.value, courseData);
+            CacheUtils.saveCourseData(selectSemester.code, courseData);
             state = _State.finish;
           }
         });
@@ -325,7 +321,7 @@ class CoursePageState extends State<CoursePage> {
       } else {
         throw e;
       }
-      _loadCourseData(selectSemester.value);
+      _loadCourseData(selectSemester.code);
     });
   }
 }
diff --git a/lib/pages/home/midterm_alerts_page.dart b/lib/pages/home/study/midterm_alerts_page.dart
similarity index 100%
rename from lib/pages/home/midterm_alerts_page.dart
rename to lib/pages/home/study/midterm_alerts_page.dart
diff --git a/lib/pages/home/reward_and_penalty_page.dart b/lib/pages/home/study/reward_and_penalty_page.dart
similarity index 100%
rename from lib/pages/home/reward_and_penalty_page.dart
rename to lib/pages/home/study/reward_and_penalty_page.dart
diff --git a/lib/pages/home/score_page.dart b/lib/pages/home/study/score_page.dart
similarity index 95%
rename from lib/pages/home/score_page.dart
rename to lib/pages/home/study/score_page.dart
index 586cd267..d7ed717d 100644
--- a/lib/pages/home/score_page.dart
+++ b/lib/pages/home/study/score_page.dart
@@ -252,7 +252,7 @@ class ScorePageState extends State<ScorePage> {
             } else {
               scoreData = response;
               state = _State.finish;
-              CacheUtils.saveScoreData(selectSemester.value, scoreData);
+              CacheUtils.saveScoreData(selectSemester.code, scoreData);
             }
           });
       }).catchError((e) {
@@ -282,18 +282,15 @@ class ScorePageState extends State<ScorePage> {
   }
 
   _loadOfflineScoreData() async {
-    scoreData = await CacheUtils.loadScoreData(selectSemester.value);
+    scoreData = await CacheUtils.loadScoreData(selectSemester.code);
     if (mounted) {
       setState(() {
         isOffline = true;
-        if (scoreData == null) state = _State.offlineEmpty;
-//        else if (scoreData.status == 204)
-//          state = _State.empty;
-//        else if (scoreData.status == 200) {
-//          state = _State.finish;
-//        } else {
-//          state = _State.error;
-//        }
+        if (scoreData == null)
+          state = _State.offlineEmpty;
+        else {
+          state = _State.finish;
+        }
       });
     }
   }
diff --git a/lib/pages/home_page.dart b/lib/pages/home_page.dart
index 819db1be..d79abc50 100644
--- a/lib/pages/home_page.dart
+++ b/lib/pages/home_page.dart
@@ -245,9 +245,9 @@ class HomePageState extends State<HomePage> {
     } else
       Helper.instance.getAllAnnouncements().then((announcementsResponse) {
         this.announcementsResponse = announcementsResponse;
-//        this.announcementsList.data.sort((a, b) {
-//          return b.weight.compareTo(a.weight);
-//        });
+        this.announcementsResponse.data.sort((a, b) {
+          return b.weight.compareTo(a.weight);
+        });
         setState(() {
           state = announcementsResponse.data.length == 0
               ? _State.empty
@@ -277,7 +277,8 @@ class HomePageState extends State<HomePage> {
       Helper.instance
           .getBusReservations()
           .then((BusReservationsData response) async {
-        await Utils.setBusNotify(context, response.reservations);
+        if (response != null)
+          await Utils.setBusNotify(context, response.reservations);
       }).catchError((e) {
         if (e is DioError) {
           switch (e.type) {
diff --git a/lib/pages/page.dart b/lib/pages/page.dart
index 6c13e778..335c331f 100644
--- a/lib/pages/page.dart
+++ b/lib/pages/page.dart
@@ -3,14 +3,14 @@ export 'home/about/open_source_page.dart';
 export 'home/bus/bus_reservations_page.dart';
 export 'home/bus/bus_reserve_page.dart';
 export 'home/bus_page.dart';
-export 'home/calculate_units_page.dart';
-export 'home/course_page.dart';
+export 'home/study/calculate_units_page.dart';
+export 'home/study/course_page.dart';
 export 'home/info/notification_page.dart';
 export 'home/info/phone_page.dart';
 export 'home/info/schedule_page.dart';
 export 'home/leave_page.dart';
 export 'home/news_content_page.dart';
-export 'home/score_page.dart';
+export 'home/study/score_page.dart';
 export 'home/setting_page.dart';
 export 'home/shcool_info_page.dart';
 export 'home/user_info_page.dart';
diff --git a/lib/res/app_icon.dart b/lib/res/app_icon.dart
index 5d966160..9c9e71fa 100644
--- a/lib/res/app_icon.dart
+++ b/lib/res/app_icon.dart
@@ -296,4 +296,24 @@ class AppIcon {
         return OMIcons.exitToApp;
     }
   }
+
+  static IconData get warning {
+    switch (AppIcon.code) {
+      case AppIcon.FILLED:
+        return Icons.warning;
+      case AppIcon.OUTLINED:
+      default:
+        return OMIcons.warning;
+    }
+  }
+
+  static IconData get folder {
+    switch (AppIcon.code) {
+      case AppIcon.FILLED:
+        return Icons.folder;
+      case AppIcon.OUTLINED:
+      default:
+        return OMIcons.folder;
+    }
+  }
 }
diff --git a/lib/utils/app_localizations.dart b/lib/utils/app_localizations.dart
index de5c33d8..4344d4d7 100644
--- a/lib/utils/app_localizations.dart
+++ b/lib/utils/app_localizations.dart
@@ -65,7 +65,7 @@ class AppLocalizations {
       'app_name': 'NKUST AP',
       'update_note_title': 'Update Notes',
       'update_note_content':
-          '1.Add search student id page.\n2.Page can swipe to back(Android).\n3.Add other section picture\n4.Fix some error.',
+          '1.Release new API version(will clear old preference data).\n2.Add midterm warning page.\n3.Add reward and penalty page.',
       'splash_content': '我們全都包了\n只剩下學校不包我們',
       'share': 'Share',
       'teacher_confirm_title': 'Are you a teacher?',
@@ -370,12 +370,14 @@ class AppLocalizations {
       'rewardAndPenaltyEmpty':
           'Oops！No reward and penalty for this semester~\n Please choose another semester \uD83D\uDE0B',
       'rewardAndPenaltyContent': 'Counts：%s\nDate：%s',
+      'campusNotSupport': 'Campus not support this feature ~',
+      'userNotSupport': 'User can\'t use this feature ~',
     },
     'zh': {
       'app_name': '高科校務通',
       'update_note_title': '更新日誌',
       'update_note_content':
-          '1.新增查詢學號頁面\n2.可滑動返回上一頁(Android)\n3.新增其他校區照片\n4.修正部分錯誤',
+          '1.全新推出新的API(此更新會清除先前資料)\n2.新增期中預警\n3.新增獎懲紀錄\n4.修正部分錯誤',
       'splash_content': '我們全都包了\n只剩下學校不包我們',
       'share': '分享',
       'teacher_confirm_title': '您是老師嗎？',
@@ -659,6 +661,8 @@ class AppLocalizations {
       'rewardAndPenalty': '獎懲紀錄',
       'rewardAndPenaltyEmpty': 'Oops！本學期沒有任何獎懲紀錄哦～\n請選擇其他學期 \uD83D\uDE0B',
       'rewardAndPenaltyContent': '數量：%s\n日期：%s',
+      'campusNotSupport': '所在的校區無法使用此功能',
+      'userNotSupport': '使用者無法使用此功能',
     },
   };
 
@@ -1171,6 +1175,10 @@ class AppLocalizations {
 
   String get rewardAndPenaltyContent =>
       _vocabularies['rewardAndPenaltyContent'];
+
+  String get campusNotSupport => _vocabularies['campusNotSupport'];
+
+  String get userNotSupport => _vocabularies['userNotSupport'];
 }
 
 class AppLocalizationsDelegate extends LocalizationsDelegate<AppLocalizations> {
diff --git a/lib/utils/preferences.dart b/lib/utils/preferences.dart
index 599f5da4..e6970372 100644
--- a/lib/utils/preferences.dart
+++ b/lib/utils/preferences.dart
@@ -3,6 +3,7 @@ import 'dart:io';
 import 'package:encrypt/encrypt.dart';
 import 'package:flutter/foundation.dart';
 import 'package:nkust_ap/config/constants.dart';
+import 'package:package_info/package_info.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
 class Preferences {
@@ -18,8 +19,17 @@ class Preferences {
 
   static init() async {
     if (kIsWeb) {
-    } else if (Platform.isIOS || Platform.isAndroid)
+    } else if (Platform.isIOS || Platform.isAndroid) {
       prefs = await SharedPreferences.getInstance();
+      PackageInfo packageInfo = await PackageInfo.fromPlatform();
+      var currentVersion =
+          Preferences.getString(Constants.PREF_CURRENT_VERSION, '0');
+      if (currentVersion == '0') return;
+      var buildNumber = int.parse(currentVersion);
+      if (buildNumber <= 30202) {
+        prefs.clear();
+      }
+    }
   }
 
   static Future<Null> setStringSecurity(String key, String data) async {
diff --git a/lib/widgets/drawer_body.dart b/lib/widgets/drawer_body.dart
index 410ffea6..6224ed4e 100644
--- a/lib/widgets/drawer_body.dart
+++ b/lib/widgets/drawer_body.dart
@@ -4,8 +4,8 @@ import 'package:flutter/material.dart';
 import 'package:http/http.dart' as http;
 import 'package:nkust_ap/config/constants.dart';
 import 'package:nkust_ap/models/models.dart';
-import 'package:nkust_ap/pages/home/midterm_alerts_page.dart';
-import 'package:nkust_ap/pages/home/reward_and_penalty_page.dart';
+import 'package:nkust_ap/pages/home/study/midterm_alerts_page.dart';
+import 'package:nkust_ap/pages/home/study/reward_and_penalty_page.dart';
 import 'package:nkust_ap/pages/page.dart';
 import 'package:nkust_ap/res/app_icon.dart';
 import 'package:nkust_ap/res/app_theme.dart';
@@ -109,9 +109,10 @@ class DrawerBodyState extends State<DrawerBody> {
                     decoration: BoxDecoration(
                       color: Resource.Colors.blue,
                       image: DecorationImage(
-                          image: AssetImage(ImageAssets.drawerBackground),
-                          fit: BoxFit.fitWidth,
-                          alignment: Alignment.bottomCenter),
+                        image: AssetImage(ImageAssets.drawerBackground),
+                        fit: BoxFit.fitWidth,
+                        alignment: Alignment.bottomCenter,
+                      ),
                     ),
                   ),
                   Positioned(
@@ -158,12 +159,12 @@ class DrawerBodyState extends State<DrawerBody> {
                   page: CalculateUnitsPage(),
                 ),
                 _subItem(
-                  icon: Icons.warning,
+                  icon: AppIcon.warning,
                   title: app.midtermAlerts,
                   page: MidtermAlertsPage(),
                 ),
                 _subItem(
-                  icon: Icons.folder,
+                  icon: AppIcon.folder,
                   title: app.rewardAndPenalty,
                   page: RewardAndPenaltyPage(),
                 ),
diff --git a/pubspec.yaml b/pubspec.yaml
index 93ec02ab..ff13d995 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,7 +1,7 @@
 name: nkust_ap
 description: A new Flutter application.
 
-version: 3.2.4+30204
+version: 3.2.5+30205
 
 environment:
   sdk: ">=2.2.2 <3.0.0"