diff --git a/app/Filament/Resources/User/ExamUserResource.php b/app/Filament/Resources/User/ExamUserResource.php
index 387597eb..36cefed9 100644
--- a/app/Filament/Resources/User/ExamUserResource.php
+++ b/app/Filament/Resources/User/ExamUserResource.php
@@ -8,6 +8,7 @@ use App\Models\Exam;
 use App\Models\ExamUser;
 use App\Repositories\ExamRepository;
 use App\Repositories\HitAndRunRepository;
+use Carbon\Carbon;
 use Filament\Forms;
 use Filament\Resources\Form;
 use Filament\Resources\Resource;
@@ -94,8 +95,34 @@ class ExamUserResource extends Resource
                     $rep->avoidExamUserBulk(['id' => $idArr], Auth::user());
                 })
                 ->deselectRecordsAfterCompletion()
+                ->requiresConfirmation()
                 ->label(__('admin.resources.exam_user.bulk_action_avoid_label'))
-                ->icon('heroicon-o-x')
+                ->icon('heroicon-o-x'),
+
+                Tables\Actions\BulkAction::make('UpdateEnd')
+                    ->form([
+                        Forms\Components\DateTimePicker::make('end')
+                            ->required()
+                            ->label(__('label.end'))
+                        ,
+                        Forms\Components\Textarea::make('reason')
+                            ->label(__('label.reason'))
+                        ,
+                    ])
+                    ->action(function (Collection $records, array $data) {
+                        $end = Carbon::parse($data['end']);
+                        $rep = new ExamRepository();
+                        foreach ($records as $record) {
+                            if ($end->isAfter($record->begin)) {
+                                $rep->updateExamUserEnd($record, $end, $data['reason'] ?? '');
+                            } else {
+                                do_log(sprintf("examUser: %d end: %s is before begin: %s, skip", $record->id, $end, $record->begin));
+                            }
+                        }
+                    })
+                    ->deselectRecordsAfterCompletion()
+                    ->label(__('admin.resources.exam_user.bulk_action_update_end_label'))
+                    ->icon('heroicon-o-pencil'),
             ]);
     }
 
diff --git a/app/Filament/Resources/User/ExamUserResource/Pages/ViewExamUser.php b/app/Filament/Resources/User/ExamUserResource/Pages/ViewExamUser.php
index db1060e8..d3efc172 100644
--- a/app/Filament/Resources/User/ExamUserResource/Pages/ViewExamUser.php
+++ b/app/Filament/Resources/User/ExamUserResource/Pages/ViewExamUser.php
@@ -4,9 +4,11 @@ namespace App\Filament\Resources\User\ExamUserResource\Pages;
 
 use App\Filament\Resources\User\ExamUserResource;
 use App\Repositories\ExamRepository;
+use Carbon\Carbon;
 use Filament\Pages\Actions;
 use Filament\Resources\Pages\ViewRecord;
 use Filament\Tables\Table;
+use Filament\Forms;
 
 class ViewExamUser extends ViewRecord
 {
@@ -16,7 +18,7 @@ class ViewExamUser extends ViewRecord
 
     private function getDetailCardData(): array
     {
-//        dd($this->record->progressFormatted);
+//        dd($this->record);
         $data = [];
         $record = $this->record;
         $data[] = [
@@ -82,6 +84,31 @@ class ViewExamUser extends ViewRecord
                 })
                 ->label(__('admin.resources.exam_user.action_avoid')),
 
+            Actions\Action::make('UpdateEnd')
+                ->mountUsing(fn (Forms\ComponentContainer $form) => $form->fill([
+                    'end' => $this->record->end,
+                ]))
+                ->form([
+                    Forms\Components\DateTimePicker::make('end')
+                        ->required()
+                        ->label(__('label.end'))
+                    ,
+                    Forms\Components\Textarea::make('reason')
+                        ->label(__('label.reason'))
+                    ,
+                ])
+                ->action(function (array $data) {
+                    $examRep = new ExamRepository();
+                    try {
+                        $examRep->updateExamUserEnd($this->record, Carbon::parse($data['end']), $data['reason'] ?? "");
+                        $this->notify('success', 'Success !');
+                        $this->record = $this->resolveRecord($this->record->id);
+                    } catch (\Exception $exception) {
+                        $this->notify('danger', $exception->getMessage());
+                    }
+                })
+                ->label(__('admin.resources.exam_user.action_update_end')),
+
             Actions\DeleteAction::make(),
         ];
     }
diff --git a/app/Models/ExamUser.php b/app/Models/ExamUser.php
index d16e4384..8ed336d5 100644
--- a/app/Models/ExamUser.php
+++ b/app/Models/ExamUser.php
@@ -124,7 +124,7 @@ class ExamUser extends NexusModel
         return $this->belongsTo(User::class, 'uid');
     }
 
-    public function progresses()
+    public function progresses(): \Illuminate\Database\Eloquent\Relations\HasMany
     {
         return $this->hasMany(ExamProgress::class, 'exam_user_id');
     }
diff --git a/app/Repositories/ExamRepository.php b/app/Repositories/ExamRepository.php
index 9e9fb3bd..4b7d5d8a 100644
--- a/app/Repositories/ExamRepository.php
+++ b/app/Repositories/ExamRepository.php
@@ -6,16 +6,14 @@ use App\Models\Exam;
 use App\Models\ExamProgress;
 use App\Models\ExamUser;
 use App\Models\Message;
-use App\Models\Setting;
 use App\Models\Snatch;
 use App\Models\Torrent;
 use App\Models\User;
 use App\Models\UserBanLog;
 use Carbon\Carbon;
 use Illuminate\Database\Eloquent\Builder;
-use Illuminate\Database\Eloquent\Model;
-use Illuminate\Database\Query\JoinClause;
 use Illuminate\Support\Arr;
+use Illuminate\Support\Collection;
 use Illuminate\Support\Facades\Auth;
 use Illuminate\Support\Facades\DB;
 
@@ -312,11 +310,33 @@ class ExamRepository extends BaseRepository
         $data = [
             'exam_id' => $exam->id,
         ];
-        if ($begin && $end) {
-            $logPrefix .= ", specific begin and end";
-            $data['begin'] = $begin;
-            $data['end'] = $end;
+        if (empty($begin)) {
+            if (!empty($exam->begin)) {
+                $begin = $exam->begin;
+                $logPrefix .= ", begin from exam->begin: $begin";
+            } else {
+                $begin = now();
+                $logPrefix .= ", begin from now: $begin";
+            }
+        } else {
+            $begin = Carbon::parse($begin);
         }
+        if (empty($end)) {
+            if (!empty($exam->end)) {
+                $end = $exam->end;
+                $logPrefix .= ", end from exam->end: $end";
+            } elseif ($exam->duration > 0) {
+                $duration = $exam->duration;
+                $end = $begin->clone()->addDays($duration)->toDateTimeString();
+                $logPrefix .= ", end from begin + duration($duration): $end";
+            } else {
+                throw new \RuntimeException("No specific end or duration");
+            }
+        } else {
+            $end = Carbon::parse($end);
+        }
+        $data['begin'] = $begin;
+        $data['end'] = $end;
         do_log("$logPrefix, data: " . nexus_json_encode($data));
         $examUser = $user->exams()->create($data);
         $this->updateProgress($examUser, $user);
@@ -506,12 +526,19 @@ class ExamRepository extends BaseRepository
         if (empty($end)) {
             throw new \InvalidArgumentException("$logPrefix, exam: {$examUser->id} no end.");
         }
+        /**
+         * @var $progressGrouped Collection
+         */
+        $progressGrouped = $examUser->progresses->keyBy("index");
         $examUserProgressFieldData = [];
         $now = now();
         foreach ($exam->indexes as $index) {
             if (!isset($index['checked']) || !$index['checked']) {
                 continue;
             }
+            if ($progressGrouped->isNotEmpty() && !$progressGrouped->has($index['index'])) {
+                continue;
+            }
             if (!isset(Exam::$indexes[$index['index']])) {
                 $msg = "Unknown index: {$index['index']}";
                 do_log("$logPrefix, $msg", 'error');
@@ -721,6 +748,9 @@ class ExamRepository extends BaseRepository
             if (!isset($index['checked']) || !$index['checked']) {
                 continue;
             }
+            if (!isset($progress[$index['index']])) {
+                continue;
+            }
             $currentValue = $progress[$index['index']] ?? 0;
             $requireValue = $index['require_value'];
             $unit = Exam::$indexes[$index['index']]['unit'] ?? '';
@@ -769,6 +799,32 @@ class ExamRepository extends BaseRepository
         return $result;
     }
 
+    public function updateExamUserEnd(ExamUser $examUser, Carbon $end, string $reason = "")
+    {
+        if ($end->isBefore($examUser->begin)) {
+            throw new \InvalidArgumentException(nexus_trans("exam-user.end_can_not_before_begin", ['begin' => $examUser->begin, 'end' => $end]));
+        }
+        $oldEndTime = $examUser->end;
+        $locale = $examUser->user->locale;
+        $examName = $examUser->exam->name;
+        Message::add([
+            'sender' => 0,
+            'receiver' => $examUser->uid,
+            'added' => now(),
+            'subject' => nexus_trans('message.exam_user_end_time_updated.subject', [
+                'exam_name' => $examName
+            ], $locale),
+            'msg' => nexus_trans('message.exam_user_end_time_updated.body', [
+                'exam_name' => $examName,
+                'old_end_time' => $oldEndTime,
+                'new_end_time' => $end,
+                'operator' => get_pure_username(),
+                'reason' => $reason,
+            ], $locale),
+        ]);
+        $examUser->update(['end' => $end]);
+    }
+
     public function removeExamUserBulk(array $params, User $user)
     {
         $result = $this->getExamUserBulkQuery($params)->delete();
@@ -983,6 +1039,8 @@ class ExamRepository extends BaseRepository
                     $examUser->delete();
                     continue;
                 }
+                //update to the newest progress
+                $examUser = $this->updateProgress($examUser, $examUser->user);
                 $locale = $examUser->user->locale;
                 if ($examUser->is_done) {
                     do_log("$currentLogPrefix, [is_done]");
diff --git a/include/constants.php b/include/constants.php
index b2449965..debac99b 100644
--- a/include/constants.php
+++ b/include/constants.php
@@ -1,6 +1,6 @@
 <?php
 defined('VERSION_NUMBER') || define('VERSION_NUMBER', '1.8.9');
-defined('RELEASE_DATE') || define('RELEASE_DATE', '2023-11-08');
+defined('RELEASE_DATE') || define('RELEASE_DATE', '2023-11-14');
 defined('IN_TRACKER') || define('IN_TRACKER', false);
 defined('PROJECTNAME') || define("PROJECTNAME","NexusPHP");
 defined('NEXUSPHPURL') || define("NEXUSPHPURL","https://nexusphp.org");
diff --git a/include/globalfunctions.php b/include/globalfunctions.php
index ca23e6aa..7a4c9e9e 100644
--- a/include/globalfunctions.php
+++ b/include/globalfunctions.php
@@ -779,6 +779,15 @@ function get_user_id()
     return auth()->user()->id ?? 0;
 }
 
+function get_pure_username()
+{
+    if (IN_NEXUS) {
+        global $CURUSER;
+        return $CURUSER["username"] ?? "";
+    }
+    return auth()->user()->username ?? "";
+}
+
 function nexus()
 {
     return \Nexus\Nexus::instance();
diff --git a/resources/lang/en/admin.php b/resources/lang/en/admin.php
index 23f78647..ab8633dc 100644
--- a/resources/lang/en/admin.php
+++ b/resources/lang/en/admin.php
@@ -89,7 +89,9 @@ return [
         ],
         'exam_user' => [
             'bulk_action_avoid_label' => 'Bulk avoid',
+            'bulk_action_update_end_label' => 'Bulk modify end time',
             'action_avoid' => 'Avoid',
+            'action_update_end' => 'Modify end time',
             'result_passed' => 'Passed!',
             'result_not_passed' => 'Not passed!',
         ],
diff --git a/resources/lang/en/exam-user.php b/resources/lang/en/exam-user.php
index 8a9e1e8f..780b90f6 100644
--- a/resources/lang/en/exam-user.php
+++ b/resources/lang/en/exam-user.php
@@ -11,4 +11,5 @@ return [
         \App\Models\ExamUser::STATUS_AVOIDED => 'Avoided',
         \App\Models\ExamUser::STATUS_NORMAL => 'Normal',
     ],
+    'end_can_not_before_begin' => "End time: :end can't be before begin time: :begin",
 ];
diff --git a/resources/lang/en/message.php b/resources/lang/en/message.php
index a4024309..c9f9abf6 100644
--- a/resources/lang/en/message.php
+++ b/resources/lang/en/message.php
@@ -43,4 +43,8 @@ BODY,
         'subject' => 'Successful torrent purchase reminder',
         'body' => 'You spent :bonus bonus to successfully buy the torrent:[url=:url]:torrent_name[/url]',
     ],
+    'exam_user_end_time_updated' => [
+        'subject' => 'Exam :exam_name end time changed',
+        'body' => 'The end time of your in-progress exam :exam_name has changed from :old_end_time to :new_end_time. admin: :operator, reason: :reason.',
+    ],
 ];
diff --git a/resources/lang/zh_CN/admin.php b/resources/lang/zh_CN/admin.php
index 49d21962..2389c818 100644
--- a/resources/lang/zh_CN/admin.php
+++ b/resources/lang/zh_CN/admin.php
@@ -87,7 +87,9 @@ return [
         ],
         'exam_user' => [
             'bulk_action_avoid_label' => '批量免除',
+            'bulk_action_update_end_label' => '批量修改结束时间',
             'action_avoid' => '免除',
+            'action_update_end' => '修改结束时间',
             'result_passed' => '通过！',
             'result_not_passed' => '未通过！',
         ],
diff --git a/resources/lang/zh_CN/exam-user.php b/resources/lang/zh_CN/exam-user.php
index 2bb61e82..00bf1977 100644
--- a/resources/lang/zh_CN/exam-user.php
+++ b/resources/lang/zh_CN/exam-user.php
@@ -11,4 +11,5 @@ return [
         \App\Models\ExamUser::STATUS_AVOIDED => '已免除',
         \App\Models\ExamUser::STATUS_NORMAL => '考核中',
     ],
+    'end_can_not_before_begin' => '结束时间：:end 不能在开始时间：:begin 之前',
 ];
diff --git a/resources/lang/zh_CN/message.php b/resources/lang/zh_CN/message.php
index 0f304240..4e195039 100644
--- a/resources/lang/zh_CN/message.php
+++ b/resources/lang/zh_CN/message.php
@@ -43,4 +43,8 @@ BODY,
         'subject' => '成功购买种子提醒',
         'body' => '你花费 :bonus 魔力成功购买了种子：[url=:url]:torrent_name[/url]',
     ],
+    'exam_user_end_time_updated' => [
+        'subject' => '考核 :exam_name 结束时间变更',
+        'body' => '你进行中的考核：:exam_name 的结束时间由 :old_end_time 变更为 :new_end_time。管理员：:operator，原因：:reason。',
+    ],
 ];
diff --git a/resources/lang/zh_TW/admin.php b/resources/lang/zh_TW/admin.php
index c6ffe422..18b7d534 100644
--- a/resources/lang/zh_TW/admin.php
+++ b/resources/lang/zh_TW/admin.php
@@ -89,7 +89,9 @@ return [
         ],
         'exam_user' => [
             'bulk_action_avoid_label' => '批量免除',
+            'bulk_action_update_end_label' => '批量修改結束時間',
             'action_avoid' => '免除',
+            'action_update_end' => '修改結束時間',
             'result_passed' => '通過！',
             'result_not_passed' => '未通過！',
         ],
diff --git a/resources/lang/zh_TW/exam-user.php b/resources/lang/zh_TW/exam-user.php
index b6fb8a19..f70a8f32 100644
--- a/resources/lang/zh_TW/exam-user.php
+++ b/resources/lang/zh_TW/exam-user.php
@@ -11,4 +11,5 @@ return [
         \App\Models\ExamUser::STATUS_AVOIDED => '已免除',
         \App\Models\ExamUser::STATUS_NORMAL => '考核中',
     ],
+    'end_can_not_before_begin' => '結束時間：:end 不能在開始時間：:begin 之前',
 ];
diff --git a/resources/lang/zh_TW/message.php b/resources/lang/zh_TW/message.php
index 52d0ffff..b1035fc9 100644
--- a/resources/lang/zh_TW/message.php
+++ b/resources/lang/zh_TW/message.php
@@ -42,4 +42,8 @@ BODY,
         'subject' => '成功購買種子提醒',
         'body' => '你花費 :bonus 魔力成功購買了種子：[url=:url]:torrent_name[/url]',
     ],
+    'exam_user_end_time_updated' => [
+        'subject' => '考核 :exam_name 結束時間變更',
+        'body' => '你進行中的考核：:exam_name 的結束時間由 :old_end_time 變更為 :new_end_time。管理員：:operator，原因：:reason。',
+    ],
 ];