diff --git a/lib/school/entity/school.dart b/lib/school/entity/school.dart
index 9c8dc4071..a935aa09a 100644
--- a/lib/school/entity/school.dart
+++ b/lib/school/entity/school.dart
@@ -114,6 +114,13 @@ class SemesterInfo implements Comparable<SemesterInfo> {
   }
 }
 
+@JsonEnum()
+enum StudentType {
+  undergraduate,
+  postgraduate,
+  ;
+}
+
 @HiveType(typeId: CacheHiveType.courseCat)
 enum CourseCat {
   @HiveField(0)
diff --git a/lib/timetable/entity/timetable.dart b/lib/timetable/entity/timetable.dart
index 4faf2dac9..5038cf3d5 100644
--- a/lib/timetable/entity/timetable.dart
+++ b/lib/timetable/entity/timetable.dart
@@ -1,9 +1,11 @@
+import 'dart:math';
 import 'dart:typed_data';
 
 import 'package:copy_with_extension/copy_with_extension.dart';
 import 'package:easy_localization/easy_localization.dart';
 import 'package:json_annotation/json_annotation.dart';
 import 'package:meta/meta.dart';
+import 'package:mimir/credentials/entity/user_type.dart';
 import 'package:mimir/credentials/init.dart';
 import 'package:mimir/entity/campus.dart';
 import 'package:mimir/school/entity/school.dart';
@@ -19,6 +21,12 @@ part 'timetable.g.dart';
 
 DateTime _kNow() => DateTime.now();
 
+StudentType _kStudentType() => switch (CredentialsInit.storage.oa.userType) {
+      OaUserType.undergraduate => StudentType.undergraduate,
+      OaUserType.postgraduate => StudentType.postgraduate,
+      _ => StudentType.undergraduate,
+    };
+
 List<TimetablePatchEntry> _patchesFromJson(List? list) {
   return list
           ?.map((e) => TimetablePatchEntry.fromJson(e as Map<String, dynamic>))
@@ -35,11 +43,16 @@ String _defaultStudentId() {
   return CredentialsInit.storage.oa.credentials?.account ?? "";
 }
 
+String _parseName(String name) {
+  return name.substring(0, min(SitTimetable.maxNameLength, name.length));
+}
+
 @JsonSerializable()
 @CopyWith(skipFields: true)
 @immutable
 class SitTimetable {
-  @JsonKey()
+  static int maxNameLength = 50;
+  @JsonKey(fromJson: _parseName)
   final String name;
   @JsonKey()
   final DateTime startDate;
@@ -49,6 +62,8 @@ class SitTimetable {
   final int schoolYear;
   @JsonKey()
   final Semester semester;
+  @JsonKey(defaultValue: _kStudentType)
+  final StudentType studentType;
   @JsonKey()
   final int lastCourseKey;
   @JsonKey()
@@ -84,6 +99,7 @@ class SitTimetable {
     required this.lastModified,
     required this.createdTime,
     required this.studentId,
+    required this.studentType,
     this.patches = const [],
     this.signature = "",
     this.version = 2,
@@ -112,6 +128,7 @@ class SitTimetable {
       "createdTime": createdTime,
       "signature": signature,
       "studentId": studentId,
+      "studentType": studentType,
       "patches": patches,
     }.toString();
   }
@@ -121,11 +138,14 @@ class SitTimetable {
         'name:"$name",'
         'signature:"$signature",'
         'studentId:"$studentId",'
+        'studentType:"$studentType",'
         "campus:$campus,"
         'startDate:DateTime.parse("$startDate"),'
         'createdTime:DateTime.parse("$createdTime"),'
         'lastModified:DateTime.parse("$lastModified"),'
         "courses:${courses.map((key, value) => MapEntry('"$key"', value.toDartCode()))},"
+        "studentId:$studentId,"
+        "studentType:$studentType,"
         "schoolYear:$schoolYear,"
         "semester:$semester,"
         "lastCourseKey:$lastCourseKey,"
@@ -146,7 +166,10 @@ class SitTimetable {
         name == other.name &&
         signature == other.signature &&
         startDate == other.startDate &&
+        studentId == other.studentId &&
+        studentType == other.studentType &&
         lastModified == other.lastModified &&
+        createdTime == other.createdTime &&
         courses.equalsKeysValues(courses.keys, other.courses) &&
         patches.equalsElements(other.patches);
   }
@@ -161,6 +184,9 @@ class SitTimetable {
         semester,
         startDate,
         lastModified,
+        createdTime,
+        studentId,
+        studentType,
         Object.hashAllUnordered(courses.entries.map((e) => (e.key, e.value))),
         Object.hashAll(patches),
         version,
@@ -175,6 +201,7 @@ class SitTimetable {
     writer.strUtf8(name, ByteLength.bit8);
     writer.strUtf8(signature, ByteLength.bit8);
     writer.strUtf8(studentId, ByteLength.bit8);
+    writer.uint8(studentType.index);
     writer.uint8(campus.index);
     writer.uint8(schoolYear);
     writer.uint8(semester.index);
@@ -198,6 +225,7 @@ class SitTimetable {
       name: reader.strUtf8(ByteLength.bit8),
       signature: reader.strUtf8(ByteLength.bit8),
       studentId: revision == 1 ? _defaultStudentId() : reader.strUtf8(ByteLength.bit8),
+      studentType: StudentType.values[reader.uint8()],
       campus: Campus.values[reader.uint8()],
       schoolYear: reader.uint8(),
       semester: Semester.values[reader.uint8()],
diff --git a/lib/timetable/entity/timetable.g.dart b/lib/timetable/entity/timetable.g.dart
index 65104dc66..8f8442362 100644
--- a/lib/timetable/entity/timetable.g.dart
+++ b/lib/timetable/entity/timetable.g.dart
@@ -24,6 +24,7 @@ abstract class _$SitTimetableCWProxy {
     DateTime? lastModified,
     DateTime? createdTime,
     String? studentId,
+    StudentType? studentType,
     List<TimetablePatchEntry>? patches,
     String? signature,
     int? version,
@@ -55,6 +56,7 @@ class _$SitTimetableCWProxyImpl implements _$SitTimetableCWProxy {
     Object? lastModified = const $CopyWithPlaceholder(),
     Object? createdTime = const $CopyWithPlaceholder(),
     Object? studentId = const $CopyWithPlaceholder(),
+    Object? studentType = const $CopyWithPlaceholder(),
     Object? patches = const $CopyWithPlaceholder(),
     Object? signature = const $CopyWithPlaceholder(),
     Object? version = const $CopyWithPlaceholder(),
@@ -100,6 +102,10 @@ class _$SitTimetableCWProxyImpl implements _$SitTimetableCWProxy {
           ? _value.studentId
           // ignore: cast_nullable_to_non_nullable
           : studentId as String,
+      studentType: studentType == const $CopyWithPlaceholder() || studentType == null
+          ? _value.studentType
+          // ignore: cast_nullable_to_non_nullable
+          : studentType as StudentType,
       patches: patches == const $CopyWithPlaceholder() || patches == null
           ? _value.patches
           // ignore: cast_nullable_to_non_nullable
@@ -293,6 +299,7 @@ SitTimetable _$SitTimetableFromJson(Map<String, dynamic> json) => SitTimetable(
       lastModified: json['lastModified'] == null ? _kNow() : DateTime.parse(json['lastModified'] as String),
       createdTime: json['createdTime'] == null ? _kNow() : DateTime.parse(json['createdTime'] as String),
       studentId: json['studentId'] as String? ?? _defaultStudentId(),
+      studentType: $enumDecodeNullable(_$StudentTypeEnumMap, json['studentType']) ?? _kStudentType(),
       patches: json['patches'] == null ? const [] : _patchesFromJson(json['patches'] as List?),
       signature: json['signature'] as String? ?? "",
       version: (json['version'] as num?)?.toInt() ?? 2,
@@ -304,6 +311,7 @@ Map<String, dynamic> _$SitTimetableToJson(SitTimetable instance) => <String, dyn
       'campus': _$CampusEnumMap[instance.campus]!,
       'schoolYear': instance.schoolYear,
       'semester': _$SemesterEnumMap[instance.semester]!,
+      'studentType': _$StudentTypeEnumMap[instance.studentType]!,
       'lastCourseKey': instance.lastCourseKey,
       'signature': instance.signature,
       'studentId': instance.studentId,
@@ -325,6 +333,11 @@ const _$SemesterEnumMap = {
   Semester.term2: 'term2',
 };
 
+const _$StudentTypeEnumMap = {
+  StudentType.undergraduate: 'undergraduate',
+  StudentType.postgraduate: 'postgraduate',
+};
+
 SitCourse _$SitCourseFromJson(Map<String, dynamic> json) => SitCourse(
       courseKey: (json['courseKey'] as num).toInt(),
       courseName: json['courseName'] as String,
diff --git a/lib/timetable/page/edit/editor.dart b/lib/timetable/page/edit/editor.dart
index 3b0cf1d62..bd8d1c716 100644
--- a/lib/timetable/page/edit/editor.dart
+++ b/lib/timetable/page/edit/editor.dart
@@ -2,6 +2,7 @@ import 'dart:async';
 
 import 'package:collection/collection.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:flutter_platform_widgets/flutter_platform_widgets.dart';
 import 'package:go_router/go_router.dart';
 import 'package:mimir/design/adaptive/foundation.dart';
@@ -335,7 +336,10 @@ class _TimetableEditorPageState extends State<TimetableEditorPage> {
         children: [
           TextFormField(
             controller: $name,
-            maxLines: 1,
+            maxLines: 2,
+            inputFormatters: [
+              LengthLimitingTextInputFormatter(SitTimetable.maxNameLength),
+            ],
             decoration: InputDecoration(
               labelText: i18n.editor.name,
               border: const OutlineInputBorder(),
diff --git a/lib/timetable/page/mine.dart b/lib/timetable/page/mine.dart
index 9e9ebd313..d938faa86 100644
--- a/lib/timetable/page/mine.dart
+++ b/lib/timetable/page/mine.dart
@@ -34,6 +34,7 @@ import '../entity/timetable.dart';
 import '../init.dart';
 import '../utils/export.dart';
 import '../utils/import.dart';
+import '../utils/update.dart';
 import '../widgets/focus.dart';
 import '../p13n/widget/style.dart';
 import 'import.dart';
@@ -353,7 +354,7 @@ class TimetableCard extends StatelessWidget {
               );
             },
           ),
-        if (!kIsWeb && kDebugMode)
+        if (!kIsWeb && canUpdateTimetable(timetable))
           EntryAction(
             icon: context.icons.refresh,
             label: i18n.update,
@@ -465,10 +466,20 @@ class TimetableDetailsPage extends ConsumerWidget {
               subtitle: context.formatYmdText(timetable.startDate).text(),
             ),
             ListTile(
-              leading: const Icon(Icons.drive_file_rename_outline),
+              leading: const Icon(Icons.create),
+              title: "Created when".text(),
+              subtitle: context.formatYmdText(timetable.createdTime).text(),
+            ),
+            ListTile(
+              leading: const Icon(Icons.person),
               title: i18n.signature.text(),
               subtitle: timetable.signature.text(),
             ),
+            ListTile(
+              leading: const Icon(Icons.school),
+              title: "Student type".text(),
+              subtitle: timetable.studentType.toString().text(),
+            ),
           ]),
           if (code2Courses.isNotEmpty) const SliverToBoxAdapter(child: Divider()),
           SliverList.builder(
diff --git a/lib/timetable/service/school.demo.dart b/lib/timetable/service/school.demo.dart
index 6cd8a4dde..d7561fb35 100644
--- a/lib/timetable/service/school.demo.dart
+++ b/lib/timetable/service/school.demo.dart
@@ -18,6 +18,7 @@ class DemoTimetableService implements TimetableService {
     return SitTimetable(
       campus: Campus.fengxian,
       studentId: CredentialsInit.storage.oa.credentials?.account ?? "",
+      studentType: StudentType.undergraduate,
       createdTime: DateTime.now(),
       courses: {
         "$key": SitCourse(
diff --git a/lib/timetable/utils/parse.pg.dart b/lib/timetable/utils/parse.pg.dart
index 71e686ed4..a2a142d31 100644
--- a/lib/timetable/utils/parse.pg.dart
+++ b/lib/timetable/utils/parse.pg.dart
@@ -195,6 +195,7 @@ SitTimetable parsePostgraduateTimetableFromCourseRaw(
     lastCourseKey: counter,
     name: "",
     studentId: studentId,
+    studentType: StudentType.postgraduate,
     campus: campus,
     startDate: DateTime.utc(0),
     createdTime: DateTime.now(),
diff --git a/lib/timetable/utils/parse.ug.dart b/lib/timetable/utils/parse.ug.dart
index 7422e599e..a978b28ca 100644
--- a/lib/timetable/utils/parse.ug.dart
+++ b/lib/timetable/utils/parse.ug.dart
@@ -138,6 +138,7 @@ SitTimetable parseUndergraduateTimetableFromRaw(
   return SitTimetable(
     courses: courses,
     studentId: studentId,
+    studentType: StudentType.undergraduate,
     lastCourseKey: lastCourseKey,
     signature: name,
     name: i18n.import.defaultName(semester.l10n(), schoolYear.toString(), (schoolYear + 1).toString()),
diff --git a/lib/timetable/utils/update.dart b/lib/timetable/utils/update.dart
new file mode 100644
index 000000000..5ba8577aa
--- /dev/null
+++ b/lib/timetable/utils/update.dart
@@ -0,0 +1,16 @@
+import 'package:mimir/credentials/init.dart';
+import 'package:mimir/settings/settings.dart';
+import 'package:mimir/timetable/entity/timetable.dart';
+import 'package:mimir/timetable/init.dart';
+
+bool canUpdateTimetable(SitTimetable old) {
+  final credentials = CredentialsInit.storage.oa.credentials;
+  if (credentials == null) return false;
+  if (old.studentId != credentials.account) return false;
+  if (old.campus != Settings.campus) return false;
+  return true;
+}
+
+Future<SitTimetable?> updateTimetable(SitTimetable old) async {
+  // TimetableInit.service.fetchUgTimetable(info)
+}
diff --git a/lib/utils/byte_io/writer.dart b/lib/utils/byte_io/writer.dart
index b2096424f..db7489192 100644
--- a/lib/utils/byte_io/writer.dart
+++ b/lib/utils/byte_io/writer.dart
@@ -44,7 +44,7 @@ class ByteWriter {
   }
 
   void _minimalByteLength(int actualBytes, [ByteLength expectedBytes = ByteLength.bit32, Endian endian = Endian.big]) {
-    assert(expectedBytes.maxValue >= actualBytes, "Expect $expectedBytes");
+    assert(expectedBytes.maxValue >= actualBytes, "Expect $expectedBytes but $actualBytes given");
     _checkCapacity(requireBytes: actualBytes + expectedBytes.byteLengths);
     switch (expectedBytes) {
       case ByteLength.bit8:
diff --git a/test/timetable_entity_test.dart b/test/timetable_entity_test.dart
index e663277f3..fe294b725 100644
--- a/test/timetable_entity_test.dart
+++ b/test/timetable_entity_test.dart
@@ -62,6 +62,7 @@ SitTimetable _get() {
     name: "Spring, 2023 Timetable",
     signature: "Liplum",
     studentId: "114514",
+    studentType: StudentType.undergraduate,
     startDate: DateTime.parse("2024-02-26"),
     createdTime: DateTime.now(),
     lastModified: DateTime.now(),