diff --git a/web/app/controllers/group.php b/web/app/controllers/group.php
index f71c23d..b017664 100644
--- a/web/app/controllers/group.php
+++ b/web/app/controllers/group.php
@@ -12,188 +12,8 @@
 	}
 
 	$group_id = $_GET['id'];
-	$group = queryGroup($group_id);
-
-	if (isSuperUser($myUser)) {
-		$group_editor = new UOJBlogEditor();
-		$group_editor->name = 'group';
-		$group_editor->blog_url = null;
-		$group_editor->cur_data = array(
-			'title' => $group['title'],
-			'tags' => array(),
-			'is_hidden' => $group['is_hidden']
-		);
-		$group_editor->label_text = array_merge($group_editor->label_text, array(
-			'view blog' => '保存小组信息',
-			'blog visibility' => '小组可见性'
-		));
-		$group_editor->show_editor = false;
-		$group_editor->show_tags = false;
-
-		$group_editor->save = function($data) {
-			global $group_id, $group;
-			DB::update("update `groups` set title = '".DB::escape($data['title'])."' where id = {$group_id}");
-
-			if ($data['is_hidden'] != $group['is_hidden'] ) {
-				DB::update("update `groups` set is_hidden = {$data['is_hidden']} where id = {$group_id}");
-			}
-		};
-		$group_editor->runAtServer();
-
-		$add_new_user_form = new UOJForm('add_new_user');
-		$add_new_user_form->addInput('new_username', 'text', '用户名', '', 
-			function ($x) {
-				global $group_id;
-
-				if (!validateUsername($x)) {
-					return '用户名不合法';
-				}
-				$user = queryUser($x);
-				if (!$user) {
-					return '用户不存在';
-				}
-
-				if (queryUserInGroup($group_id, $x)) {
-					return '该用户已经在小组中';
-				}
-
-				return '';
-			},
-			null
-		);
-		$add_new_user_form->submit_button_config['align'] = 'compressed';
-		$add_new_user_form->submit_button_config['text'] = '添加到小组';
-		$add_new_user_form->handle = function() {
-			global $group_id, $myUser;
-			$username = $_POST['new_username'];
-
-			DB::insert("insert into groups_users (group_id, username) values ({$group_id}, '{$username}')");
-		};
-		$add_new_user_form->runAtServer();
-
-		$delete_user_form = new UOJForm('delete_user');
-		$delete_user_form->addInput('del_username', 'text', '用户名', '', 
-			function ($x) {
-				global $group_id;
-
-				if (!validateUsername($x)) {
-					return '用户名不合法';
-				}
-				if (!queryUserInGroup($group_id, $x)) {
-					return '该用户不在小组中';
-				}
-
-				return '';
-			},
-			null
-		);
-		$delete_user_form->submit_button_config['align'] = 'compressed';
-		$delete_user_form->submit_button_config['text'] = '从小组中删除';
-		$delete_user_form->handle = function() {
-			global $group_id, $myUser;
-			$username = $_POST['del_username'];
-
-			DB::query("delete from groups_users where username='{$username}' and group_id={$group_id}");
-		};
-		$delete_user_form->runAtServer();
-
-		$add_new_assignment_form = new UOJForm('add_new_assignment');
-		$add_new_assignment_form->addInput('new_assignment_list_id', 'text', '题单 ID', '', 
-			function ($x) {
-				global $group_id;
-
-				if (!validateUInt($x)) {
-					return '题单 ID 不合法';
-				}
-				$list = queryProblemList($x);
-				if (!$list) {
-					return '题单不存在';
-				}
-				if ($list['is_hidden'] != 0) {
-					return '题单是隐藏的';
-				}
-
-				if (queryAssignmentByGroupListID($group_id, $x)) {
-					return '该题单已经在作业中';
-				}
-
-				return '';
-			},
-			null
-		);
-
-		$default_ddl = new DateTime();
-		$default_ddl->setTime(17, 0, 0);
-		$default_ddl->add(new DateInterval("P7D"));
-
-		$add_new_assignment_form->addInput('new_assignment_deadline', 'text', '截止时间', $default_ddl->format('Y-m-d H:i'), 
-			function ($x) {
-				$ddl = DateTime::createFromFormat('Y-m-d H:i', $x);
-				if (!$ddl) {
-					return '截止时间格式不正确，请以类似 "2020-10-1 17:00" 的格式输入';
-				}
-
-				return '';
-			},
-			null
-		);
-
-		$add_new_assignment_form->submit_button_config['align'] = 'compressed';
-		$add_new_assignment_form->submit_button_config['text'] = '添加作业';
-		$add_new_assignment_form->handle = function() {
-			global $group_id, $myUser;
-			$list_id = $_POST['new_assignment_list_id'];
-			$ddl = DateTime::createFromFormat('Y-m-d H:i', $_POST['new_assignment_deadline']);
-			$ddl_str = $ddl->format('Y-m-d H:i:s');
-
-			DB::insert("insert into assignments (group_id, list_id, create_time, deadline) values ({$group_id}, '{$list_id}', now(), '{$ddl_str}')");
-		};
-		$add_new_assignment_form->runAtServer();
-
-		$remove_assignment_form = new UOJForm('remove_assignment');
-		$remove_assignment_form->addInput('remove_assignment_list_id', 'text', '题单 ID', '', 
-			function ($x) {
-				global $group_id;
-
-				if (!validateUInt($x)) {
-					return '题单 ID 不合法';
-				}
-				if (!queryAssignmentByGroupListID($group_id, $x)) {
-					return '该题单不在作业中';
-				}
-
-				return '';
-			},
-			null
-		);
-
-		$remove_assignment_form->submit_button_config['align'] = 'compressed';
-		$remove_assignment_form->submit_button_config['text'] = '删除作业';
-		$remove_assignment_form->handle = function() {
-			global $group_id, $myUser;
-			$list_id = $_POST['remove_assignment_list_id'];
-
-			DB::query("delete from assignments where list_id='{$list_id}' and group_id={$group_id}");
-		};
-		$remove_assignment_form->runAtServer();
-
-		$announcement_form = new UOJForm('announcement_form');
-		$announcement_form->addVTextArea('announcement_content', '公告', $group['announcement'], 
-			function ($x) {
-				return '';
-			},
-			null
-		);
-		$announcement_form->submit_button_config['align'] = 'compressed';
-		$announcement_form->submit_button_config['text'] = '更新公告';
-		$announcement_form->handle = function() {
-			global $group_id, $myUser;
-
-			$content = $_POST['announcement_content'];
-			$esc_content = DB::escape($content);
-			DB::query("update groups set announcement = '{$esc_content}' where id = {$group_id}");
-		};
-		$announcement_form->runAtServer();
+	if (!validateUInt($group_id) || !($group = queryGroup($group_id))) {
+		become404Page();
 	}
 	?>
 
@@ -202,6 +22,12 @@
 <h2 style="margin-top: 24px"><?= $group['title'] ?></h2>
 <p>(<b>小组 ID</b>: <?= $group['id'] ?>)</p>
 
+<?php if (isSuperUser($myUser)): ?>
+<ul class="nav nav-tabs" role="tablist">
+	<li class="nav-item"><a class="nav-link" href="/group/<?= $group['id'] ?>/manage" role="tab">管理</a></li>
+</ul>
+<?php endif ?>
+
 <div class="row">
 	<div class="col-sm-12 mt-4">
 		<h5><?= UOJLocale::get('news') ?></h5>
@@ -270,28 +96,4 @@
 	</div>
 </div>
 
-<?php if (isSuperUser($myUser)): ?>
-<h5>编辑小组信息</h5>
-<div class="mb-4">
-    <?php $group_editor->printHTML(); ?>
-</div>
-
-<h5>编辑小组公告</h5>
-<div>
-	<?php $announcement_form->printHTML(); ?>
-</div>
-
-<h5>添加用户到小组</h5>
-<?php $add_new_user_form->printHTML(); ?>
-
-<h5>从小组中删除用户</h5>
-<?php $delete_user_form->printHTML(); ?>
-
-<h5>为小组添加作业</h5>
-<?php $add_new_assignment_form->printHTML(); ?>
-
-<h5>删除小组的作业</h5>
-<?php $remove_assignment_form->printHTML(); ?>
-<?php endif ?>
-
 <?php echoUOJPageFooter() ?>
diff --git a/web/app/controllers/group_manage.php b/web/app/controllers/group_manage.php
new file mode 100644
index 0000000..3273a9b
--- /dev/null
+++ b/web/app/controllers/group_manage.php
@@ -0,0 +1,226 @@
+<?php
+	requirePHPLib('form');
+	requirePHPLib('judger');
+	requirePHPLib('data');
+
+	if (!Auth::check()) {
+		become403Page(UOJLocale::get('need login'));
+	}
+
+	if (!isNormalUser($myUser)) {
+		become403Page();
+	}
+
+	$group_id = $_GET['id'];
+	if (!validateUInt($group_id) || !($group = queryGroup($group_id))) {
+		become404Page();
+	}
+
+	if (!isSuperUser($myUser)) {
+		become403Page();
+	}
+
+	$group_editor = new UOJBlogEditor();
+	$group_editor->name = 'group';
+	$group_editor->blog_url = null;
+	$group_editor->cur_data = array(
+		'title' => $group['title'],
+		'tags' => array(),
+		'is_hidden' => $group['is_hidden']
+	);
+	$group_editor->label_text = array_merge($group_editor->label_text, array(
+		'view blog' => '保存小组信息',
+		'blog visibility' => '小组可见性'
+	));
+	$group_editor->show_editor = false;
+	$group_editor->show_tags = false;
+
+	$group_editor->save = function($data) {
+		global $group_id, $group;
+		DB::update("update `groups` set title = '".DB::escape($data['title'])."' where id = {$group_id}");
+
+		if ($data['is_hidden'] != $group['is_hidden'] ) {
+			DB::update("update `groups` set is_hidden = {$data['is_hidden']} where id = {$group_id}");
+		}
+	};
+	$group_editor->runAtServer();
+
+	$add_new_user_form = new UOJForm('add_new_user');
+	$add_new_user_form->addInput('new_username', 'text', '用户名', '', 
+		function ($x) {
+			global $group_id;
+
+			if (!validateUsername($x)) {
+				return '用户名不合法';
+			}
+			$user = queryUser($x);
+			if (!$user) {
+				return '用户不存在';
+			}
+
+			if (queryUserInGroup($group_id, $x)) {
+				return '该用户已经在小组中';
+			}
+
+			return '';
+		},
+		null
+	);
+	$add_new_user_form->submit_button_config['align'] = 'compressed';
+	$add_new_user_form->submit_button_config['text'] = '添加到小组';
+	$add_new_user_form->handle = function() {
+		global $group_id, $myUser;
+		$username = $_POST['new_username'];
+
+		DB::insert("insert into groups_users (group_id, username) values ({$group_id}, '{$username}')");
+	};
+	$add_new_user_form->runAtServer();
+
+	
+	$delete_user_form = new UOJForm('delete_user');
+	$delete_user_form->addInput('del_username', 'text', '用户名', '', 
+		function ($x) {
+			global $group_id;
+
+			if (!validateUsername($x)) {
+				return '用户名不合法';
+			}
+			if (!queryUserInGroup($group_id, $x)) {
+				return '该用户不在小组中';
+			}
+
+			return '';
+		},
+		null
+	);
+	$delete_user_form->submit_button_config['align'] = 'compressed';
+	$delete_user_form->submit_button_config['text'] = '从小组中删除';
+	$delete_user_form->handle = function() {
+		global $group_id, $myUser;
+		$username = $_POST['del_username'];
+
+		DB::query("delete from groups_users where username='{$username}' and group_id={$group_id}");
+	};
+	$delete_user_form->runAtServer();
+
+	$add_new_assignment_form = new UOJForm('add_new_assignment');
+	$add_new_assignment_form->addInput('new_assignment_list_id', 'text', '题单 ID', '', 
+		function ($x) {
+			global $group_id;
+
+			if (!validateUInt($x)) {
+				return '题单 ID 不合法';
+			}
+			$list = queryProblemList($x);
+			if (!$list) {
+				return '题单不存在';
+			}
+			if ($list['is_hidden'] != 0) {
+				return '题单是隐藏的';
+			}
+
+			if (queryAssignmentByGroupListID($group_id, $x)) {
+				return '该题单已经在作业中';
+			}
+
+			return '';
+		},
+		null
+	);
+
+	$default_ddl = new DateTime();
+	$default_ddl->setTime(17, 0, 0);
+	$default_ddl->add(new DateInterval("P7D"));
+
+	$add_new_assignment_form->addInput('new_assignment_deadline', 'text', '截止时间', $default_ddl->format('Y-m-d H:i'), 
+		function ($x) {
+			$ddl = DateTime::createFromFormat('Y-m-d H:i', $x);
+			if (!$ddl) {
+				return '截止时间格式不正确，请以类似 "2020-10-1 17:00" 的格式输入';
+			}
+
+			return '';
+		},
+		null
+	);
+
+	
+	$remove_assignment_form = new UOJForm('remove_assignment');
+	$remove_assignment_form->addInput('remove_assignment_list_id', 'text', '题单 ID', '', 
+		function ($x) {
+			global $group_id;
+
+			if (!validateUInt($x)) {
+				return '题单 ID 不合法';
+			}
+			if (!queryAssignmentByGroupListID($group_id, $x)) {
+				return '该题单不在作业中';
+			}
+
+			return '';
+		},
+		null
+	);
+
+	$remove_assignment_form->submit_button_config['align'] = 'compressed';
+	$remove_assignment_form->submit_button_config['text'] = '删除作业';
+	$remove_assignment_form->handle = function() {
+		global $group_id, $myUser;
+		$list_id = $_POST['remove_assignment_list_id'];
+
+		DB::query("delete from assignments where list_id='{$list_id}' and group_id={$group_id}");
+	};
+	$remove_assignment_form->runAtServer();
+
+	$announcement_form = new UOJForm('announcement_form');
+	$announcement_form->addVTextArea('announcement_content', '公告', $group['announcement'], 
+		function ($x) {
+			return '';
+		},
+		null
+	);
+	$announcement_form->submit_button_config['text'] = '更新公告';
+	$announcement_form->handle = function() {
+		global $group_id, $myUser;
+
+		$content = $_POST['announcement_content'];
+		$esc_content = DB::escape($content);
+		DB::query("update groups set announcement = '{$esc_content}' where id = {$group_id}");
+	};
+	$announcement_form->runAtServer();
+	?>
+
+<?php echoUOJPageHeader($group['title'] . ' 管理'); ?>
+
+<h1 class="h2">
+	<?= $group['title'] ?>（#<?= $group['id'] ?>）管理
+</h1>
+
+<ul class="nav nav-tabs" role="tablist">
+	<li class="nav-item"><a class="nav-link" href="/group/<?= $group['id'] ?>/manage" role="tab">管理</a></li>
+	<li class="nav-item"><a class="nav-link" href="/group/<?= $group['id'] ?>" role="tab">返回</a></li>
+</ul>
+
+<div class="top-buffer-md"></div>
+
+<h5>编辑小组信息</h5>
+<div class="mb-4">
+    <?php $group_editor->printHTML(); ?>
+</div>
+
+<h5>编辑小组公告</h5>
+<?php $announcement_form->printHTML(); ?>
+
+<h5>添加用户到小组</h5>
+<?php $add_new_user_form->printHTML(); ?>
+
+<h5>从小组中删除用户</h5>
+<?php $delete_user_form->printHTML(); ?>
+
+<h5>为小组添加作业</h5>
+<?php $add_new_assignment_form->printHTML(); ?>
+
+<h5>删除小组的作业</h5>
+<?php $remove_assignment_form->printHTML(); ?>
+
+<?php echoUOJPageFooter() ?>
diff --git a/web/app/route.php b/web/app/route.php
index 1042ab5..74bd405 100644
--- a/web/app/route.php
+++ b/web/app/route.php
@@ -46,6 +46,7 @@ Route::group([
 
 		Route::any('/groups', '/groups.php');
 		Route::any('/group/{id}', '/group.php');
+		Route::any('/group/{id}/manage', '/group_manage.php');
 
 		Route::any('/assignment/{id}', '/assignment.php');
 		
@@ -68,7 +69,6 @@ Route::group([
 		Route::any('/forgot-password', '/forgot_pw.php');
 		Route::any('/reset-password', '/reset_pw.php');
 		Route::any('/user/profile/{username}', '/user_info.php');
-		Route::any('/user/self_reviews/{username}', '/user_self_reviews.php');
 		Route::any('/user/modify-profile', '/change_user_info.php');
 		Route::any('/user/msg', '/user_msg.php');
 		Route::any('/user/system-msg', '/user_system_msg.php');