diff --git a/src/timemanagerapp/.idea/workspace.xml b/src/timemanagerapp/.idea/workspace.xml
index bca427b..38c0ff5 100644
--- a/src/timemanagerapp/.idea/workspace.xml
+++ b/src/timemanagerapp/.idea/workspace.xml
@@ -1,10 +1,22 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="AndroidLayouts">
+    <shared>
+      <config />
+    </shared>
+  </component>
   <component name="AutoImportSettings">
     <option name="autoReloadType" value="SELECTIVE" />
   </component>
   <component name="ChangeListManager">
-    <list default="true" id="c05b8a8d-d805-4e13-a87e-db77479b20ae" name="Default Changelist" comment="解绝数据库连接的问题" />
+    <list default="true" id="c05b8a8d-d805-4e13-a87e-db77479b20ae" name="Default Changelist" comment="解绝数据库连接的问题">
+      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/lib/entity/Course.dart" beforeDir="false" afterPath="$PROJECT_DIR$/lib/entity/Course.dart" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/lib/entity/Task.dart" beforeDir="false" afterPath="$PROJECT_DIR$/lib/entity/Task.dart" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/lib/entity/Team.dart" beforeDir="false" afterPath="$PROJECT_DIR$/lib/entity/Team.dart" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/lib/entity/User.dart" beforeDir="false" afterPath="$PROJECT_DIR$/lib/entity/User.dart" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/lib/entity/Work.dart" beforeDir="false" afterPath="$PROJECT_DIR$/lib/entity/Work.dart" afterDir="false" />
+    </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
     <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
@@ -133,7 +145,7 @@
       <workItem from="1695208047127" duration="657000" />
       <workItem from="1695299184020" duration="3382000" />
       <workItem from="1695309116608" duration="10000" />
-      <workItem from="1695340191136" duration="18442000" />
+      <workItem from="1695340191136" duration="21394000" />
     </task>
     <task id="LOCAL-00001" summary="解绝数据库连接的问题">
       <option name="closed" value="true" />
@@ -143,7 +155,15 @@
       <option name="project" value="LOCAL" />
       <updated>1695360453622</updated>
     </task>
-    <option name="localTasksCounter" value="2" />
+    <task id="LOCAL-00002" summary="解绝数据库连接的问题">
+      <option name="closed" value="true" />
+      <created>1695361008460</created>
+      <option name="number" value="00002" />
+      <option name="presentableId" value="LOCAL-00002" />
+      <option name="project" value="LOCAL" />
+      <updated>1695361008460</updated>
+    </task>
+    <option name="localTasksCounter" value="3" />
     <servers />
   </component>
   <component name="ToolWindowManager">
diff --git a/src/timemanagerapp/lib/entity/Course.dart b/src/timemanagerapp/lib/entity/Course.dart
index e47277e..44915d2 100644
--- a/src/timemanagerapp/lib/entity/Course.dart
+++ b/src/timemanagerapp/lib/entity/Course.dart
@@ -1,9 +1,21 @@
 class Course {
-  int id = -1;
-  String name = "";
-  double credit = -1;
-  String teacher = "";
-  String location = "";
-  DateTime start = DateTime.now();
-  DateTime end = DateTime.now();
+  int id;
+  String name;
+  double credit;
+  String teacher;
+  String location;
+  String remark;
+  DateTime start;
+  DateTime end;
+
+  Course({
+    required this.id,
+    required this.name,
+    required this.credit,
+    required this.teacher,
+    required this.location,
+    required this.remark,
+    required this.start,
+    required this.end,
+  });
 }
diff --git a/src/timemanagerapp/lib/entity/Task.dart b/src/timemanagerapp/lib/entity/Task.dart
index e69de29..490237b 100644
--- a/src/timemanagerapp/lib/entity/Task.dart
+++ b/src/timemanagerapp/lib/entity/Task.dart
@@ -0,0 +1,17 @@
+class Task {
+  int id;
+  int userId;
+  String content;
+  int frequency;
+  DateTime startTime;
+  DateTime endTime;
+
+  Task({
+    required this.id,
+    required this.userId,
+    required this.content,
+    required this.frequency,
+    required this.startTime,
+    required this.endTime,
+  });
+}
diff --git a/src/timemanagerapp/lib/entity/Team.dart b/src/timemanagerapp/lib/entity/Team.dart
index e69de29..201d1ef 100644
--- a/src/timemanagerapp/lib/entity/Team.dart
+++ b/src/timemanagerapp/lib/entity/Team.dart
@@ -0,0 +1,11 @@
+class Team {
+  int id;
+  String teamName;
+  int maxNumber;
+
+  Team({
+    required this.id,
+    required this.teamName,
+    required this.maxNumber,
+  });
+}
\ No newline at end of file
diff --git a/src/timemanagerapp/lib/entity/User.dart b/src/timemanagerapp/lib/entity/User.dart
index e69de29..4a9cc7d 100644
--- a/src/timemanagerapp/lib/entity/User.dart
+++ b/src/timemanagerapp/lib/entity/User.dart
@@ -0,0 +1,13 @@
+class User {
+  int id;
+  String username;
+  String password;
+  String role;
+
+  User({
+    required this.id,
+    required this.username,
+    required this.password,
+    required this.role,
+  });
+}
\ No newline at end of file
diff --git a/src/timemanagerapp/lib/entity/Work.dart b/src/timemanagerapp/lib/entity/Work.dart
index e69de29..9464de7 100644
--- a/src/timemanagerapp/lib/entity/Work.dart
+++ b/src/timemanagerapp/lib/entity/Work.dart
@@ -0,0 +1,19 @@
+class Work {
+  int id;
+  String status;
+  String workContent;
+  int teamId;
+  int functionaryId;
+  DateTime endTime;
+  DateTime startTime;
+
+  Work({
+    required this.id,
+    required this.status,
+    required this.workContent,
+    required this.teamId,
+    required this.functionaryId,
+    required this.endTime,
+    required this.startTime,
+  });
+}
\ No newline at end of file