diff --git a/web/app/controllers/blog_show.php b/web/app/controllers/blog_show.php
index 9b1918e..641e624 100644
--- a/web/app/controllers/blog_show.php
+++ b/web/app/controllers/blog_show.php
@@ -11,5 +11,5 @@
 		become404Page();
 	}
 	
-	redirectTo(HTML::blog_url($blog['poster'], '/post/'.$_GET['id']));
+	redirectTo(HTML::blog_url($blog['poster'], '/post/'.$_GET['id'] . ($_GET['sub'] ?: '')));
 	?>
diff --git a/web/app/controllers/super_manage.php b/web/app/controllers/super_manage.php
index d1e9956..19e0960 100644
--- a/web/app/controllers/super_manage.php
+++ b/web/app/controllers/super_manage.php
@@ -1,867 +1,467 @@
 <?php
-	$REQUIRE_LIB['md5'] = '';
-	$REQUIRE_LIB['jquery.query'] = '';
-
+	requireLib('bootstrap5');
+	requireLib('md5');
+	requireLib('jquery.query');
 	requirePHPLib('form');
 	requirePHPLib('judger');
-	
+
+	define('SCRIPT_REFRESH_AS_GET', '<script>;window.location = window.location.origin + window.location.pathname + (window.location.search.length ? window.location.search + "&" : "?") + "_=" + (+new Date()) + window.location.hash;</script>');
+
 	if (!isSuperUser($myUser)) {
 		become403Page();
 	}
 
-	$register_form = new UOJForm('register');
-	$register_form->submit_button_config['align'] = 'compressed';
-	$register_form->addInput('new_username', 'text', '用户名', '',
-		function ($new_username) {
-			if (!validateUsername($new_username)) {
-				return '用户名不合法';
-			}
-			if (queryUser($new_username)) {
-				return '该用户已存在';
-			}
-			return '';
-		},
-		null
-	);
-	$register_form->addInput('new_password', 'password', '密码', '',
-		function ($new_password) {
-			return '';
-		},
-		null
-	);
-	$register_form->addInput('new_realname', 'text', '真实姓名', '',
-		function ($new_realname) {
-			return '';
-		},
-		null
-	);
-	$register_form->addInput('new_school', 'text', '学校名称', '',
-		function ($new_school) {
-			return '';
-		},
-		null
-	);
-	$register_form->handle = function() {
-		$new_username = $_POST['new_username'];
-		$new_password = $_POST['new_password'];
-		$new_realname = DB::escape($_POST['new_realname']);
-		$new_school = DB::escape($_POST['new_school']);
-		$new_password = hash_hmac('md5', $new_password, getPasswordClientSalt());
-		$new_password = getPasswordToStore($new_password, $new_username);
-		$svn_pw = uojRandString(10);
+	$cur_tab = isset($_GET['tab']) ? $_GET['tab'] : 'index';
 
-		DB::query("insert into user_info (username, realname, school, password, svn_password, register_time, usergroup) values ('$new_username', '$new_realname', '$new_school', '$new_password', '$svn_pw', now(), 'U')");
-	};
-	$register_form->runAtServer();
-
-	$change_password_form = new UOJForm('change_password');
-	$change_password_form->submit_button_config['align'] = 'compressed';
-	$change_password_form->addInput('p_username', 'text', '用户名', '',
-		function ($p_username) {
-			if (!validateUsername($p_username)) {
-				return '用户名不合法';
-			}
-			if (!queryUser($p_username)) {
-				return '用户不存在';
-			}
-			return '';
-		},
-		null
-	);
-	$change_password_form->addInput('p_password', 'password', '密码', '',
-		function ($p_password) {
-			return '';
-		},
-		null
-	);
-	$change_password_form->handle = function() {
-		$p_username = $_POST['p_username'];
-		$p_password = $_POST['p_password'];
-		$p_password = hash_hmac('md5', $p_password, getPasswordClientSalt());
-		$p_password = getPasswordToStore($p_password, $p_username);
-
-		DB::query("update user_info set password = '$p_password' where username = '$p_username'");
-	};
-	$change_password_form->runAtServer();
-
-	$change_realname_form = new UOJForm('change_realname');
-	$change_realname_form->submit_button_config['align'] = 'compressed';
-	$change_realname_form->addInput('r_username', 'text', '用户名', '',
-		function ($r_username) {
-			if (!validateUsername($r_username)) {
-				return '用户名不合法';
-			}
-			if (!queryUser($r_username)) {
-				return '用户不存在';
-			}
-			return '';
-		},
-		null
-	);
-	$change_realname_form->addInput('r_realname', 'text', '真实姓名', '',
-		function ($r_realname) {
-			return '';
-		},
-		null
-	);
-	$change_realname_form->handle = function() {
-		$r_username = $_POST['r_username'];
-		$r_realname = DB::escape($_POST['r_realname']);
-
-		DB::query("update user_info set realname = '$r_realname' where username = '$r_username'");
-	};
-	$change_realname_form->runAtServer();
-
-	$change_school_form = new UOJForm('change_school');
-	$change_school_form->submit_button_config['align'] = 'compressed';
-	$change_school_form->addInput('s_username', 'text', '用户名', '',
-		function ($s_username) {
-			if (!validateUsername($s_username)) {
-				return '用户名不合法';
-			}
-			if (!queryUser($s_username)) {
-				return '用户不存在';
-			}
-			return '';
-		},
-		null
-	);
-	$change_school_form->addInput('s_school', 'text', '学校名称', '',
-		function ($s_school) {
-			return '';
-		},
-		null
-	);
-	$change_school_form->handle = function() {
-		$s_username = $_POST['s_username'];
-		$s_school = DB::escape($_POST['s_school']);
-
-		DB::query("update user_info set school = '$s_school' where username = '$s_username'");
-	};
-	$change_school_form->runAtServer();
-
-	$user_form = new UOJForm('user');
-	$user_form->submit_button_config['align'] = 'compressed';
-	$user_form->addInput('username', 'text', '用户名', '',
-		function ($username) {
-			if (!validateUsername($username)) {
-				return '用户名不合法';
-			}
-			if (!queryUser($username)) {
-				return '用户不存在';
-			}
-			return '';
-		},
-		null
-	);
-	$options = array(
-		'banneduser' => '设为封禁用户',
-		'normaluser' => '设为普通用户',
-		'superuser' => '设为超级用户'
-	);
-	$user_form->addSelect('op_type', $options, '操作类型', '');
-	$user_form->handle = function() {
-		global $user_form;
-		
-		$username = $_POST['username'];
-		switch ($_POST['op_type']) {
-			case 'banneduser':
-				DB::update("update user_info set usergroup = 'B' where username = '{$username}'");
-				DB::update("update user_info set usertype = 'banned' where username = '{$username}'");
-				break;
-			case 'normaluser':
-				DB::update("update user_info set usergroup = 'U' where username = '{$username}'");
-				DB::update("update user_info set usertype = 'student' where username = '{$username}'");
-				break;
-			case 'superuser':
-				DB::update("update user_info set usergroup = 'S' where username = '{$username}'");
-				DB::update("update user_info set usertype = 'student' where username = '{$username}'");
-				break;
-		}
-	};
-	$user_form->runAtServer();
-
-	$usertype_form = new UOJForm('usertype');
-	$user_form->submit_button_config['align'] = 'compressed';
-	$usertype_form->addInput('usertype_username', 'text', '用户名', '',
-		function ($username) {
-			if (!validateUsername($username)) {
-				return '用户名不合法';
-			}
-			if (!queryUser($username)) {
-				return '用户不存在';
-			}
-			return '';
-		},
-		null
-	);
-	$usertype_options = array(
-		'student' => '学生',
-		'teacher' => '老师',
-		'problem_uploader' => '题目上传者',
-		'problem_manager' => '题目管理员',
-		'contest_judger' => '比赛评测员',
-		'contest_only' => '仅比赛参加者',
-	);
-	$usertype_form->addSelect('usertype_type', $usertype_options, '角色', '');
-	$usertype_form->addSelect('usertype_op', array('add' => '添加', 'remove' => '移除'), '操作', '');
-	$usertype_form->handle = function() {
-		global $usertype_form;
-
-		$username = $_POST['usertype_username'];
-		$user = queryUser($username);
-		switch ($_POST['usertype_type']) {
-			case 'teacher':
-				if ($_POST['usertype_op'] === 'add') {
-					$user = addUserType($user, 'teacher');
-					$user = removeUserType($user, 'student');
-				} else {
-					$user = removeUserType($user, 'teacher');
-					$user = addUserType($user, 'student');
-				}
-				break;
-			case 'problem_manager':
-				if ($_POST['usertype_op'] === 'add') {
-					$user = addUserType($user, 'problem_manager');
-					$user = removeUserType($user, 'problem_uploader');
-				} else {
-					$user = removeUserType($user, 'problem_manager');
-				}
-				break;
-			case 'student':
-			case 'problem_uploader':
-			case 'contest_judger':
-			case 'contest_only':
-				$user = $_POST['usertype_op'] === 'add'
-					? addUserType($user, $_POST['usertype_type'])
-					: removeUserType($user, $_POST['usertype_type']);
-				break;
-		}
-
-		DB::update("update user_info set usertype = '{$user['usertype']}' where username = '{$username}'");
-	};
-	$usertype_form->runAtServer();
+	$tabs_info = [
+		'index' => [
+			'name' => '首页管理',
+			'url' => "/super_manage/index",
+		],
+		'users' => [
+			'name' => '用户管理',
+			'url' => "/super_manage/users",
+		],
+		'submissions' => [
+			'name' => '提交记录',
+			'url' => "/super_manage/submissions",
+		],
+		'custom_test' => [
+			'name' => '自定义测试',
+			'url' => "/super_manage/custom_test",
+		],
+		'image_hosting' => [
+			'name' => '图床管理',
+			'url' => "/super_manage/image_hosting",
+		],
+	];
 	
-	$blog_link_index = new UOJForm('blog_link_index');
-	$blog_link_index->addInput('blog_id2', 'text', '博客ID', '',
-		function ($x) {
-			if (!validateUInt($x)) {
-				return 'ID不合法';
+	if (!isset($tabs_info[$cur_tab])) {
+		become404Page();
+	}
+
+	if ($cur_tab == 'index') {
+		// ========== 公告 ==========
+		if (isset($_POST['submit-delete_announcement']) && $_POST['submit-delete_announcement'] == 'delete_announcement') {
+			crsf_defend();
+
+			$blog_id = $_POST['blog_id'];
+
+			if (!validateUInt($blog_id)) {
+				die('<script>alert("移除失败：博客 ID 无效");</script>' . SCRIPT_REFRESH_AS_GET);
 			}
-			if (!queryBlog($x)) {
-				return '博客不存在';
-			}
-			return '';
-		},
-		null
-	);
-	$blog_link_index->addInput('blog_level', 'text', '置顶级别（删除不用填）', '0',
-		function ($x) {
-			if (!validateUInt($x)) {
-				return '数字不合法';
-			}
-			if ($x > 3) {
-				return '该级别不存在';
-			}
-			return '';
-		},
-		null
-	);
-	$options = array(
-		'add' => '添加',
-		'del' => '删除'
-	);
-	$blog_link_index->addSelect('op-type2', $options, '操作类型', '');
-	$blog_link_index->handle = function() {
-		$blog_id = $_POST['blog_id2'];
-		$blog_level = $_POST['blog_level'];
-		if ($_POST['op-type2'] == 'add') {
+			
+			DB::delete("DELETE FROM important_blogs WHERE blog_id = {$blog_id}");
+
+			die('<script>alert("移除成功！");</script>' . SCRIPT_REFRESH_AS_GET);
+		}
+
+		$announcements = DB::selectAll("SELECT blogs.id as id, blogs.title as title, blogs.poster as poster, user_info.realname as realname, blogs.post_time as post_time, important_blogs.level as level, blogs.is_hidden as is_hidden FROM important_blogs INNER JOIN blogs ON important_blogs.blog_id = blogs.id INNER JOIN user_info ON blogs.poster = user_info.username ORDER BY level DESC, important_blogs.blog_id DESC");
+
+		$add_announcement_form = new UOJForm('add_announcement');
+		$add_announcement_form->addInput('blog_id', 'text', '博客 ID', '',
+			function($id, &$vdata) {
+				if (!validateUInt($id)) {
+					return '博客 ID 无效';
+				}
+
+				if (!queryBlog($id)) {
+					return '博客不存在';
+				}
+
+				$vdata['blog_id'] = $id;
+
+				return '';
+			},
+			null
+		);
+		$add_announcement_form->addInput('blog_level', 'text', '置顶级别', '0',
+			function ($x, &$vdata) {
+				if (!validateUInt($x)) {
+					return '数字不合法';
+				}
+
+				if ($x > 3) {
+					return '该级别不存在';
+				}
+
+				$vdata['level'] = $x;
+				
+				return '';
+			},
+			null
+		);
+		$add_announcement_form->handle = function(&$vdata) {
+			$blog_id = $vdata['blog_id'];
+			$blog_level = $vdata['level'];
+			
 			if (DB::selectFirst("select * from important_blogs where blog_id = {$blog_id}")) {
 				DB::update("update important_blogs set level = {$blog_level} where blog_id = {$blog_id}");
 			} else {
 				DB::insert("insert into important_blogs (blog_id, level) values ({$blog_id}, {$blog_level})");
 			}
-		}
-		if ($_POST['op-type2'] == 'del') {
-			DB::delete("delete from important_blogs where blog_id = {$blog_id}");
-		}
-	};
-	$blog_link_index->runAtServer();
-	
-	$blog_deleter = new UOJForm('blog_deleter');
-	$blog_deleter->addInput('blog_del_id', 'text', '博客ID', '',
-		function ($x) {
-			if (!validateUInt($x)) {
-				return 'ID不合法';
-			}
-			if (!queryBlog($x)) {
-				return '博客不存在';
-			}
-			return '';
-		},
-		null
-	);
-	$blog_deleter->handle = function() {
-		deleteBlog($_POST['blog_del_id']);
-	};
-	$blog_deleter->runAtServer();
+		};
+		$add_announcement_form->submit_button_config['align'] = 'compressed';
+		$add_announcement_form->submit_button_config['text'] = '提交';
+		$add_announcement_form->succ_href = '/super_manage/index#announcements';
+		$add_announcement_form->runAtServer();
 
-	$countdown_adder = new UOJForm('new_countdown');
-	$countdown_adder->submit_button_config['align'] = 'compressed';
-	$countdown_adder->addInput('new_countdown_title', 'text', '标题', '',
-		function ($new_countdown_title) {
-			return '';
-		},
-		null
-	);
-	$countdown_adder->addInput('new_countdown_endtime', 'text', '截止日期', date("Y-m-d H:i:s"),
-		function($str, &$vdata) {
-			try {
-				$vdata['new_countdown_endtime'] = new DateTime($str);
-			} catch (Exception $e) {
-				return '无效时间格式';
-			}
-			return '';
-		},
-		null
-	);
-	$countdown_adder->handle = function() {
-		$new_countdown_title = $_POST['new_countdown_title'];
-		$new_countdown_endtime = $_POST['new_countdown_endtime'];
-		$esc_countdown_title = DB::escape($new_countdown_title);
+		// ========== 倒计时 ==========
+		if (isset($_POST['submit-delete_countdown']) && $_POST['submit-delete_countdown'] == 'delete_countdown') {
+			crsf_defend();
 
-		DB::query("insert into countdowns (title, endtime) values ('$esc_countdown_title', '$new_countdown_endtime')");
-	};
-	$countdown_adder->runAtServer();
+			$countdown_id = $_POST['countdown_id'];
 
-	$countdown_deleter = new UOJForm('delete_countdown');
-	$countdown_deleter->submit_button_config['align'] = 'compressed';
-	$countdown_deleter->addInput('delete_countdown_id', 'text', 'ID', '',
-		function ($x) {
-			if (!validateUInt($x)) {
-				return 'ID不合法';
+			if (!validateUInt($countdown_id)) {
+				die('<script>alert("删除失败：倒计时 ID 无效");</script>' . SCRIPT_REFRESH_AS_GET);
 			}
 
-			if (!DB::selectFirst("select * from countdowns where id = $x")) {
-				return '倒计时不存在';
-			}
+			DB::delete("DELETE FROM countdowns WHERE id = {$countdown_id}");
 
-			return '';
-		},
-		null
-	);
-	$countdown_deleter->handle = function() {
-		$delete_countdown_id = $_POST['delete_countdown_id'];
-
-		DB::query("delete from countdowns where id = $delete_countdown_id");
-	};
-	$countdown_deleter->runAtServer();
-
-	$countdowns_header_row = <<<EOD
-	<tr>
-		<th>ID</th>
-		<th>标题</th>
-		<th>时间</th>
-	</tr>
-EOD;
-	$countdowns_print_row = function($row) {
-		echo <<<EOD
-	<tr>
-		<td>{$row['id']}</td>
-		<td>{$row['title']}</td>
-		<td>{$row['endtime']}</td>
-	</tr>
-EOD;
-	};
-
-	$friend_link_adder = new UOJForm('new_friend_link');
-	$friend_link_adder->submit_button_config['align'] = 'compressed';
-	$friend_link_adder->addInput('new_friend_link_title', 'text', '名称', '',
-		function ($str) {
-			return '';
-		},
-		null
-	);
-	$friend_link_adder->addInput('new_friend_link_url', 'text', '链接', '',
-		function($str) {
-			if (!validateURL($str)) {
-				return '链接不合法';
-			}
-
-			return '';
-		},
-		null
-	);
-	$friend_link_adder->addInput('new_friend_link_level', 'text', '权重', '10',
-		function($str) {
-			if (!validateUInt($str)) {
-				return '权重必须是数字';
-			}
-
-			return '';
-		},
-		null
-	);
-	$friend_link_adder->handle = function() {
-		$new_friend_link_title = $_POST['new_friend_link_title'];
-		$new_friend_link_url = $_POST['new_friend_link_url'];
-		$new_friend_link_level = $_POST['new_friend_link_level'];
-		$esc_new_friend_link_title = DB::escape($new_friend_link_title);
-		$esc_new_friend_link_url = DB::escape($new_friend_link_url);
-
-		DB::query("insert into friend_links (title, url, level) values ('$esc_new_friend_link_title', '$esc_new_friend_link_url', $new_friend_link_level)");
-	};
-	$friend_link_adder->runAtServer();
-
-	$friend_link_deleter = new UOJForm('delete_friend_link');
-	$friend_link_deleter->submit_button_config['align'] = 'compressed';
-	$friend_link_deleter->addInput('delete_friend_link_id', 'text', 'ID', '',
-		function ($id) {
-			if (!validateUInt($id)) {
-				return 'ID不合法';
-			}
-
-			if (!DB::selectFirst("select * from friend_links where id = $id")) {
-				return 'ID不存在';
-			}
-
-			return '';
-		},
-		null
-	);
-	$friend_link_deleter->handle = function() {
-		$delete_friend_link_id = $_POST['delete_friend_link_id'];
-
-		DB::query("delete from friend_links where id = $delete_friend_link_id");
-	};
-	$friend_link_deleter->runAtServer();
-
-	$friend_links_header_row = <<<EOD
-	<tr>
-		<th>ID</th>
-		<th>名称</th>
-		<th>链接</th>
-		<th>置顶等级</th>
-	</tr>
-EOD;
-	$friend_links_print_row = function($row) {
-		echo <<<EOD
-	<tr>
-		<td>{$row['id']}</td>
-		<td>{$row['title']}</td>
-		<td>{$row['url']}</td>
-		<td>{$row['level']}</td>
-	</tr>
-EOD;
-	};
-
-	$contest_submissions_deleter = new UOJForm('contest_submissions');
-	$contest_submissions_deleter->addInput('contest_id', 'text', '比赛ID', '',
-		function ($x) {
-			if (!validateUInt($x)) {
-				return 'ID不合法';
-			}
-			if (!queryContest($x)) {
-				return '博客不存在';
-			}
-			return '';
-		},
-		null
-	);
-	$contest_submissions_deleter->handle = function() {
-		$contest = queryContest($_POST['contest_id']);
-		genMoreContestInfo($contest);
-		
-		$contest_problems = DB::selectAll("select problem_id from contests_problems where contest_id = {$contest['id']}");
-		foreach ($contest_problems as $problem) {
-			$submissions = DB::selectAll("select * from submissions where problem_id = {$problem['problem_id']} and submit_time < '{$contest['start_time_str']}'");
-			foreach ($submissions as $submission) {
-				$content = json_decode($submission['content'], true);
-				unlink(UOJContext::storagePath().$content['file_name']);
-				DB::delete("delete from submissions where id = {$submission['id']}");
-				updateBestACSubmissions($submission['submitter'], $submission['problem_id']);
-			}
-		}
-	};
-	$contest_submissions_deleter->runAtServer();
-
-	$custom_test_deleter = new UOJForm('custom_test_deleter');
-	$custom_test_deleter->addInput('last', 'text', '删除末尾记录', '5',
-		function ($x, &$vdata) {
-			if (!validateUInt($x)) {
-				return '不合法';
-			}
-			$vdata['last'] = $x;
-			return '';
-		},
-		null
-	);
-	$custom_test_deleter->handle = function(&$vdata) {
-		$all = DB::selectAll("select * from custom_test_submissions order by id asc limit {$vdata['last']}");
-		foreach ($all as $submission) {
-			$content = json_decode($submission['content'], true);
-			unlink(UOJContext::storagePath().$content['file_name']);
-		}
-		DB::delete("delete from custom_test_submissions order by id asc limit {$vdata['last']}");
-	};
-	$custom_test_deleter->runAtServer();
-
-	$judger_adder = new UOJForm('judger_adder');
-	$judger_adder->addInput('judger_adder_name', 'text', '评测机名称', '',
-		function ($x, &$vdata) {
-			if (!validateUsername($x)) {
-				return '不合法';
-			}
-			if (DB::selectCount("select count(*) from judger_info where judger_name='$x'")!=0) {
-				return '不合法';
-			}
-			$vdata['name'] = $x;
-			return '';
-		},
-		null
-	);
-	$judger_adder->handle = function(&$vdata) {
-		$password=uojRandString(32);
-		DB::insert("insert into judger_info (judger_name,password) values('{$vdata['name']}','{$password}')");
-	};
-	$judger_adder->runAtServer();
-	
-	$judger_deleter = new UOJForm('judger_deleter');
-	$judger_deleter->addInput('judger_deleter_name', 'text', '评测机名称', '',
-		function ($x, &$vdata) {
-			if (!validateUsername($x)) {
-				return '不合法';
-			}
-			if (DB::selectCount("select count(*) from judger_info where judger_name='$x'")!=1) {
-				return '不合法';
-			}
-			$vdata['name'] = $x;
-			return '';
-		},
-		null
-	);
-	$judger_deleter->handle = function(&$vdata) {
-		DB::delete("delete from judger_info where judger_name='{$vdata['name']}'");
-	};
-	$judger_deleter->runAtServer();
-
-	$judgerlist_cols = array('judger_name', 'password');
-	$judgerlist_config = array();
-	$judgerlist_header_row = <<<EOD
-	<tr>
-		<th>评测机名称</th>
-		<th>密码</th>
-	</tr>
-EOD;
-	$judgerlist_print_row = function($row) {
-		echo <<<EOD
-			<tr>
-				<td>{$row['judger_name']}</td>
-				<td>{$row['password']}</td>
-			</tr>
-EOD;
-	};
-	
-	$userlist_cols = array('username', 'school', 'usergroup', 'usertype', 'register_time');
-	$userlist_config = array('page_len' => 20,
-			'table_classes' => array('table', 'table-bordered', 'table-hover', 'table-striped'));
-	$userlist_header_row = <<<EOD
-	<tr>
-		<th>用户名</th>
-		<th>学校</th>
-		<th style="width: 6em">用户类别</th>
-		<th style="width: 12em">注册时间</th>
-	</tr>
-EOD;
-
-	$cur_tab = isset($_GET['tab']) ? $_GET['tab'] : 'users';
-
-	$user_list_cond = array();
-	if ($cur_tab === 'users') {
-		if (isset($_GET['username']) && $_GET['username'] != "") {
-			$user_list_cond[] = "username like '%" . DB::escape($_GET['username']) . "%'";
-		}
-		if (isset($_GET['usergroup']) && $_GET['usergroup'] != "") {
-			$user_list_cond[] = "usergroup = '" . DB::escape($_GET['usergroup']) . "'";
-		}
-	}
-	if ($user_list_cond) {
-		$user_list_cond = join($user_list_cond, ' and ');
-	} else {
-		$user_list_cond = '1';
-	}
-
-	$userlist_print_row = function($row) {
-		$hislink = getUserLink($row['username']);
-		echo <<<EOD
-			<tr>
-				<td>${hislink}</td>
-				<td>{$row['school']}</td>
-				<td>{$row['usergroup']}, {$row['usertype']}</td>
-				<td>{$row['register_time']}</td>
-			</tr>
-EOD;
-	};
-
-	$image_hosting_cols = ['*'];
-	$image_hosting_config = ['page_len' => 20, 'table_classes' => ['table', 'table-bordered', 'table-hover', 'table-striped']];
-	$image_hosting_header_row = <<<EOD
-	<tr>
-		<th>ID</th>
-		<th>上传者</th>
-		<th>预览</th>
-		<th style="width: 3em">文件大小</th>
-		<th style="width: 12em">上传时间</th>
-	</tr>
-EOD;
-	$image_hosting_print_row = function($row) {
-		$user_link = getUserLink($row['uploader']);
-		if ($row['size'] < 1024 * 512) {
-			$size = strval(round($row['size'] * 1.0 / 1024, 1)) . ' KB';
-		} else {
-			$size = strval(round($row['size'] * 1.0 / 1024 / 1024, 1)) . ' MB';
+			die('<script>alert("删除成功！");</script>' . SCRIPT_REFRESH_AS_GET);
 		}
 
-		echo <<<EOD
-	<tr>
-		<td>{$row['id']}</td>
-		<td>$user_link</td>
-		<td><img src="{$row['path']}" width="250"></td>
-		<td>$size</td>
-		<td>{$row['upload_time']}</td>
-	</tr>
-EOD;
-	};
+		$countdowns = DB::selectAll("SELECT id, title, endtime FROM countdowns ORDER BY endtime ASC");
 
-	$image_deleter = new UOJForm('image_deleter');
-	$image_deleter->submit_button_config['align'] = 'compressed';
-	$image_deleter->submit_button_config['text'] = '删除';
-	$image_deleter->submit_button_config['class_str'] = 'btn btn-danger';
-	$image_deleter->addInput('image_deleter_id', 'text', '图片 ID', '',
-		function ($x, &$vdata) {
-			if (!validateUInt($x)) {
-				return 'ID 不合法';
-			}
-			if (!DB::selectCount("select count(*) from users_images where id = $x")) {
-				return '图片不存在';
-			}
-			$vdata['id'] = $x;
-			return '';
-		},
-		null
-	);
-	$image_deleter->handle = function(&$vdata) {
-		$id = $vdata['id'];
-		$result = DB::selectFirst("SELECT * from users_images WHERE id = $id");
-		unlink(UOJContext::storagePath().$result['path']);
-		DB::delete("DELETE FROM users_images WHERE id = $id");
-	};
-	$image_deleter->runAtServer();
+		$add_countdown_form = new UOJForm('add_countdown');
+		$add_countdown_form->addInput('countdown_title', 'text', '标题', '',
+			function($title, &$vdata) {
+				if ($title == '') {
+					return '标题不能为空';
+				}
 
-	$change_user_image_total_size_limit_form = new UOJForm('change_user_image_total_size_limit');
-	$change_user_image_total_size_limit_form->submit_button_config['align'] = 'compressed';
-	$change_user_image_total_size_limit_form->addInput('change_user_image_total_size_limit_username', 'text', '用户名', '',
-		function ($x, &$vdata) {
-			if (!validateUsername($x)) {
-				return '用户名不合法';
-			}
-			if (!queryUser($x)) {
-				return '用户不存在';
-			}
-			$vdata['username'] = $x;
-			return '';
-		},
-		null
-	);
-	$change_user_image_total_size_limit_form->addInput('change_user_image_total_size_limit_limit', 'text', '存储限制（单位：Byte）', '104857600',
-		function ($x, &$vdata) {
-			if (!validateUInt($x, 10)) {
-				return '限制不合法';
-			}
-			if (intval($x) > 2147483648) {
-				return '限制不能大于 2 GB';
-			}
-			$vdata['limit'] = $x;
-			return '';
-		},
-		null
-	);
-	$change_user_image_total_size_limit_form->handle = function(&$vdata) {
-		DB::update("UPDATE user_info SET images_size_limit = {$vdata['limit']} WHERE username = '{$vdata['username']}'");
-	};
-	$change_user_image_total_size_limit_form->runAtServer();
+				$vdata['title'] = $title;
 
-	$tabs_info = array(
-		'users' => array(
-			'name' => '用户管理',
-			'url' => "/super-manage/users"
-		),
-		'blogs' => array(
-			'name' => '博客管理',
-			'url' => "/super-manage/blogs"
-		),
-		'index' => array(
-			'name' => '首页管理',
-			'url' => '/super-manage/index'
-		),
-		'submissions' => array(
-			'name' => '提交记录',
-			'url' => "/super-manage/submissions"
-		),
-		'custom-test' => array(
-			'name' => '自定义测试',
-			'url' => '/super-manage/custom-test'
-		),
-		'judger' => array(
-			'name' => '评测机管理',
-			'url' => '/super-manage/judger'
-		),
-		'image_hosting' => array(
-			'name' => '图床管理',
-			'url' => '/super-manage/image_hosting'
-		)
-	);
-	
-	if (!isset($tabs_info[$cur_tab])) {
-		become404Page();
+				return '';
+			},
+			null
+		);
+		$add_countdown_form->addInput('countdown_endtime', 'text', '结束时间', date("Y-m-d H:i:s"),
+			function($endtime, &$vdata) {
+				try {
+					$vdata['endtime'] = new DateTime($endtime);
+				} catch (Exception $e) {
+					return '无效时间格式';
+				}
+
+				return '';
+			},
+			null
+		);
+		$add_countdown_form->handle = function(&$vdata) {
+			$esc_title = DB::escape($vdata['title']);
+			$esc_endtime = DB::escape($vdata['endtime']->format('Y-m-d H:i:s'));
+
+			DB::insert("INSERT INTO countdowns (title, endtime) VALUES ('{$esc_title}', '{$esc_endtime}')");
+		};
+		$add_countdown_form->submit_button_config['align'] = 'compressed';
+		$add_countdown_form->submit_button_config['text'] = '添加';
+		$add_countdown_form->succ_href = '/super_manage/index#countdowns';
+		$add_countdown_form->runAtServer();
+
+		// ========== 常用链接 ==========
+		if (isset($_POST['submit-delete_link']) && $_POST['submit-delete_link'] == 'delete_link') {
+			crsf_defend();
+
+			$item_id = $_POST['item_id'];
+
+			if (!validateUInt($item_id)) {
+				die('<script>alert("删除失败：ID 无效");</script>' . SCRIPT_REFRESH_AS_GET);
+			}
+
+			DB::delete("DELETE FROM links WHERE id = {$item_id}");
+
+			die('<script>alert("删除成功！");</script>' . SCRIPT_REFRESH_AS_GET);
+		}
+
+		$links = DB::selectAll("SELECT `id`, `title`, `url`, `level` FROM `friend_links` ORDER BY `level` DESC, `id` ASC");
+
+		$add_link_form = new UOJForm('add_link');
+		$add_link_form->addInput('link_title', 'text', '标题', '',
+			function($title, &$vdata) {
+				if ($title == '') {
+					return '标题不能为空';
+				}
+
+				$vdata['title'] = $title;
+
+				return '';
+			},
+			null
+		);
+		$add_link_form->addInput('link_url', 'text', '链接', '',
+			function($url, &$vdata) {
+				if (!validateURL($url)) {
+					return '链接不合法';
+				}
+
+				$vdata['url'] = $url;
+
+				return '';
+			},
+			null
+		);
+		$add_link_form->addInput('link_level', 'text', '权重', '10',
+			function($level, &$vdata) {
+				if (!validateUInt($level)) {
+					return '数字不合法';
+				}
+
+				$vdata['level'] = $level;
+				
+				return '';
+			},
+			null
+		);
+		$add_link_form->handle = function(&$vdata) {
+			$esc_title = DB::escape($vdata['title']);
+			$esc_url = DB::escape($vdata['url']);
+			$level = $vdata['level'];
+			
+			DB::insert("INSERT INTO friend_links (title, url, level) VALUES ('{$esc_title}', '{$esc_url}', {$level})");
+		};
+		$add_link_form->submit_button_config['align'] = 'compressed';
+		$add_link_form->submit_button_config['text'] = '添加';
+		$add_link_form->succ_href = '/super_manage/index#links';
+		$add_link_form->runAtServer();
+	} elseif ($cur_tab == 'users') {
+		//
 	}
 	?>
-<?php
-	requireLib('shjs');
-	requireLib('morris');
-	?>
-<?php echoUOJPageHeader('系统管理') ?>
-<div class="row">
-	<div class="col-sm-3">
-		<?= HTML::tablist($tabs_info, $cur_tab, 'nav-pills flex-column') ?>
+
+<?php echoUOJPageHeader(UOJLocale::get('system manage')) ?>
+
+<h1 class="h2">
+	<?= UOJLocale::get('system manage') ?>
+</h1>
+
+
+<div class="row mt-4">
+<!-- left col -->
+<div class="col-md-3">
+
+<div class="list-group">
+	<?php foreach ($tabs_info as $id => $tab): ?>
+	<a
+		role="button"
+		class="list-group-item list-group-item-action <?= $cur_tab == $id ? 'active' : '' ?>"
+		href="<?= $tab['url'] ?>">
+		<?= $tab['name'] ?>
+	</a>
+	<?php endforeach ?>
+</div>
+
+</div>
+<!-- end left col -->
+
+<!-- right col -->
+<div class="col-md-9">
+<?php if ($cur_tab == 'index'): ?>
+<div class="card">
+	<div class="card-header">
+		<ul class="nav nav-tabs card-header-tabs" role="tablist">
+			<li class="nav-item">
+				<a class="nav-link active" href="#announcements" data-bs-toggle="tab" data-bs-target="#announcements">公告</a>
+			</li>
+			<li class="nav-item">
+				<a class="nav-link" href="#countdowns" data-bs-toggle="tab" data-bs-target="#countdowns">倒计时</a>
+			</li>
+			<li class="nav-item">
+				<a class="nav-link" href="#links" data-bs-toggle="tab" data-bs-target="#links">常用链接</a>
+			</li>
+		</ul>
 	</div>
-	
-	<div class="col-sm-9">
-		<?php if ($cur_tab === 'users'): ?>
-			<h3>添加新用户</h3>
-			<?php $register_form->printHTML(); ?>
-			<h3>修改用户密码</h3>
-			<?php $change_password_form->printHTML(); ?>
-			<h3>用户类别设置</h3>
-			<p>在此处更新用户所属类别后会自动重置用户权限。</p>
-			<?php $user_form->printHTML(); ?>
-			<h3>用户权限管理</h3>
-			<?php $usertype_form->printHTML(); ?>
-			<h3>修改用户真实姓名</h3>
-			<?php $change_realname_form->printHTML(); ?>
-			<h3>修改用户学校名称</h3>
-			<?php $change_school_form->printHTML(); ?>
-			<h3>用户名单</h3>
-			<div id="user-query">
-				<form class="form-horizontal uoj-form-compressed" target="_self" method="GET">
-					<div class="form-group">
-						<label for="username" class="col-sm-2 control-label">用户名</label>
-						<div class="col-sm-3">
-							<input type="text" class="form-control" name="username" id="user-query-username" value="" />
-						</div>
-					</div>
-					<div class="form-group">
-						<label for="usergroup" class="col-sm-2 control-label">用户类别</label>
-						<div class="col-sm-3">
-							<select class="form-control" id="user-query-usergroup" name="usergroup">
-								<option value="">*: 所有用户</option>
-								<option value="B">B: 封禁用户</option>
-								<option value="U">U: 普通用户</option>
-								<option value="S">S: 超级用户</option>
-							</select>
-						</div>
-					</div><div class="text-center"><button type="submit" id="user-query-submit" class="mt-2 btn btn-secondary">查询</button></div>
-				</form>
-			</div>
-			<?php echoLongTable($userlist_cols, 'user_info', $user_list_cond, 'order by username asc', $userlist_header_row, $userlist_print_row, $userlist_config) ?>
-		<?php elseif ($cur_tab === 'blogs'): ?>
-			<div>
-				<h4>添加到公告</h4>
-				<?php $blog_link_index->printHTML(); ?>
-			</div>
-		
-			<div>
-				<h4>删除博客</h4>
-				<?php $blog_deleter->printHTML(); ?>
-			</div>
-		<?php elseif ($cur_tab === 'index'): ?>
-			<div>
-				<h4>倒计时</h4>
-				<?php echoLongTable(array('id', 'title', 'endtime'), 'countdowns', '1', 'order by endtime asc', $countdowns_header_row, $countdowns_print_row, $userlist_config) ?>
-				<h5>添加倒计时</h5>
-				<?php $countdown_adder->printHTML(); ?>
-				<h5>删除倒计时</h5>
-				<?php $countdown_deleter->printHTML(); ?>
+	<div class="card-body">
+		<div class="tab-content">
+			<!-- 公告 -->
+			<div class="tab-pane active" id="announcements">
+				<div id="announcements-list"></div>
 
-				<h4>友情链接</h4>
-				<?php echoLongTable(array('id', 'title', 'url', 'level'), 'friend_links', '1', 'order by level desc, id asc', $friend_links_header_row, $friend_links_print_row, $userlist_config) ?>
-				<h5>添加友情链接</h5>
-				<?php $friend_link_adder->printHTML(); ?>
-				<h5>删除友情链接</h5>
-				<?php $friend_link_deleter->printHTML(); ?>
+				<script>
+					var announcements = <?= json_encode($announcements) ?>;
+
+					$('#announcements-list').long_table(
+						announcements,
+						1,
+						'<tr>' +
+							'<th style="width:3em">ID</th>' +
+							'<th style="width:14em">标题</th>' +
+							'<th style="width:8em">发布者</th>' +
+							'<th style="width:8em">发布时间</th>' +
+							'<th style="width:6em">置顶等级</th>' +
+							'<th style="width:8em">操作</th>' +
+						'</tr>',
+						function(row) {
+							var col_tr = '';
+
+							col_tr += '<tr>';
+
+							col_tr += '<td>' + row['id'] + '</td>';
+							col_tr += '<td>' +
+									(row['is_hidden'] ? '<span class="text-danger">[隐藏]</span> ' : '') +
+									'<a class="text-decoration-none" href="/blogs/' + row['id'] + '">' +
+										row['title'] +
+									'</a>' +
+								'</td>';
+							col_tr += '<td>' + getUserLink(row['poster'], row['realname']) + '</td>';
+							col_tr += '<td>' + row['post_time'] + '</td>';
+							col_tr += '<td>' + row['level'] + '</td>';
+							col_tr += '<td>' +
+										'<a class="text-decoration-none d-inline-block align-middle" href="/post/' + row['id'] + '/write">编辑</a>' +
+										'<form class="d-inline-block ms-2" method="POST" onsubmit=\'return confirm("你真的要移除这条公告吗？")\'>' +
+											'<input type="hidden" name="_token" value="<?= crsf_token() ?>">' +
+											'<input type="hidden" name="blog_id" value="' + row['id'] + '">' +
+											'<button class="btn btn-link text-danger text-decoration-none p-0" type="submit" name="submit-delete_announcement" value="delete_announcement">移除</button>' +
+										'</form>' +
+									'</td>';
+
+							col_tr += '</tr>';
+
+							return col_tr;
+						},
+						{
+							div_classes: ['table-responsive'],
+							table_classes: ['table', 'align-middle'],
+							page_len: 20,
+						}
+					);
+				</script>
+
+				<h5>添加/修改公告</h5>
+				<?php $add_announcement_form->printHTML(); ?>
 			</div>
-		<?php elseif ($cur_tab === 'submissions'): ?>
-			<div>
-				<h4>删除赛前提交记录</h4>
-				<?php $contest_submissions_deleter->printHTML(); ?>
+
+			<!-- 倒计时 -->
+			<div class="tab-pane" id="countdowns">
+				<div id="countdowns-list"></div>
+
+				<script>
+					var countdowns = <?= json_encode($countdowns) ?>;
+
+					$('#countdowns-list').long_table(
+						countdowns,
+						1,
+						'<tr>' +
+							'<th style="width:14em">标题</th>' +
+							'<th style="width:8em">结束时间</th>' +
+							'<th style="width:6em">操作</th>' +
+						'</tr>',
+						function(row) {
+							var col_tr = '';
+
+							col_tr += '<tr>';
+
+							col_tr += '<td>' + row['title'] + '</td>';
+							col_tr += '<td>' + row['endtime'] + '</td>';
+							col_tr += '<td>' +
+									'<form method="POST" onsubmit=\'return confirm("你真的要删除这个倒计时吗？")\'>' +
+										'<input type="hidden" name="_token" value="<?= crsf_token() ?>">' +
+										'<input type="hidden" name="countdown_id" value="' + row['id'] + '">' +
+										'<button class="btn btn-link text-danger text-decoration-none p-0" type="submit" name="submit-delete_countdown" value="delete_countdown">删除</button>' +
+									'</form>' +
+								'</td>';
+
+							col_tr += '</tr>';
+
+							return col_tr;
+						},
+						{
+							div_classes: ['table-responsive'],
+							table_classes: ['table', 'align-middle'],
+							page_len: 20,
+						}
+					);
+				</script>
+
+				<h5>添加倒计时</h5>
+				<?php $add_countdown_form->printHTML(); ?>
 			</div>
-			<div>
-				<h4>测评失败的提交记录</h4>
-				<?php echoSubmissionsList("result_error = 'Judgement Failed'", 'order by id desc', array('result_hidden' => ''), $myUser); ?>
+
+			<!-- 常用链接 -->
+			<div class="tab-pane" id="links">
+				<div id="links-list"></div>
+
+				<script>
+					var links = <?= json_encode($links) ?>;
+
+					$('#links-list').long_table(
+						links,
+						1,
+						'<tr>' +
+							'<th style="width:18em">标题</th>' +
+							'<th style="width:26em">链接</th>' +
+							'<th style="width:14em">操作</th>' +
+						'</tr>',
+						function(row) {
+							var col_tr = '';
+
+							col_tr += '<tr>';
+
+							col_tr += '<td>' + row['title'] + '</td>';
+							col_tr += '<td>' + row['url'] + '</td>';
+							col_tr += '<td>' +
+									'<form method="POST" onsubmit=\'return confirm("你真的要删除这条链接吗？")\'>' +
+										'<input type="hidden" name="_token" value="<?= crsf_token() ?>">' +
+										'<input type="hidden" name="link_id" value="' + row['id'] + '">' +
+										'<button class="btn btn-link text-danger text-decoration-none p-0" type="submit" name="submit-delete_link" value="delete_link">删除</button>' +
+									'</form>' +
+								'</td>';
+
+							col_tr += '</tr>';
+
+							return col_tr;
+						},
+						{
+							div_classes: ['table-responsive'],
+							table_classes: ['table', 'align-middle'],
+							page_len: 20,
+						}
+					);
+				</script>
+
+				<h5>添加常用链接</h5>
+				<?php $add_link_form->printHTML(); ?>
 			</div>
-		<?php elseif ($cur_tab === 'custom-test'): ?>
-		<?php $custom_test_deleter->printHTML() ?>
-		<?php
-				$submissions_pag = new Paginator(array(
-					'col_names' => array('*'),
-					'table_name' => 'custom_test_submissions',
-					'cond' => '1',
-					'tail' => 'order by id asc',
-					'page_len' => 5
-				));
-			foreach ($submissions_pag->get() as $submission) {
-				$problem = queryProblemBrief($submission['problem_id']);
-				$submission_result = json_decode($submission['result'], true);
-				echo '<dl class="dl-horizontal">';
-				echo '<dt>id</dt>';
-				echo '<dd>', "#{$submission['id']}", '</dd>';
-				echo '<dt>problem_id</dt>';
-				echo '<dd>', "#{$submission['problem_id']}", '</dd>';
-				echo '<dt>submit time</dt>';
-				echo '<dd>', $submission['submit_time'], '</dd>';
-				echo '<dt>submitter</dt>';
-				echo '<dd>', $submission['submitter'], '</dd>';
-				echo '<dt>judge_time</dt>';
-				echo '<dd>', $submission['judge_time'], '</dd>';
-				echo '</dl>';
-				echoSubmissionContent($submission, getProblemCustomTestRequirement($problem));
-				echoCustomTestSubmissionDetails($submission_result['details'], "submission-{$submission['id']}-details");
-			}
-			?>
-		<?= $submissions_pag->pagination() ?>
-		<?php elseif ($cur_tab === 'judger'): ?>
-			<div>
-				<h4>添加评测机</h4>
-				<?php $judger_adder->printHTML(); ?>
-			</div>
-			<div>
-				<h4>删除评测机</h4>
-				<?php $judger_deleter->printHTML(); ?>
-			</div>
-			<h3>评测机列表</h3>
-			<?php echoLongTable($judgerlist_cols, 'judger_info', "1=1", '', $judgerlist_header_row, $judgerlist_print_row, $judgerlist_config) ?>
-		<?php elseif ($cur_tab === 'image_hosting'): ?>
-			<h3>图床管理</h3>
-			<?php echoLongTable($image_hosting_cols, 'users_images', "1=1", 'order by id desc', $image_hosting_header_row, $image_hosting_print_row, $image_hosting_config) ?>
-			<div>
-				<h4>删除图片</h4>
-				<?php $image_deleter->printHTML() ?>
-			</div>
-			<div>
-				<h4>修改用户存储上限</h4>
-				<?php $change_user_image_total_size_limit_form->printHTML() ?>
-			</div>
-		<?php endif ?>
+		</div>
 	</div>
 </div>
+
+<script>
+$(document).ready(function() {
+	// Javascript to enable link to tab
+	var hash = location.hash.replace(/^#/, '');
+	if (hash) {
+		bootstrap.Tab.jQueryInterface.call($('.nav-tabs a[href="#' + hash + '"]'), 'show').blur();
+	}
+
+	// Change hash for page-reload
+	$('.nav-tabs a').on('shown.bs.tab', function(e) {
+		window.location.hash = e.target.hash;
+	});
+});
+</script>
+<?php elseif ($cur_tab == 'users'): ?>
+<div class="card">
+	<div class="card-header">
+		<ul class="nav nav-tabs card-header-tabs">
+			<li class="nav-item">
+				<a class="nav-link active" href="#" data-bs-toggle="tab" data-bs-target="#">Active</a>
+			</li>
+			<li class="nav-item">
+				<a class="nav-link" href="#" data-bs-toggle="tab" data-bs-target="#">2</a>
+			</li>
+		</ul>
+	</div>
+	<div class="card-body">
+		<div class="tab-content">
+			<div class="tab-pane" id="">1</div>
+			<div class="tab-pane" id="">2</div>
+		</div>
+	</div>
+</div>
+<?php endif ?>
+</div>
+<!-- end right col -->
+</div>
+
 <?php echoUOJPageFooter() ?>
diff --git a/web/app/controllers/super_manage_old.php b/web/app/controllers/super_manage_old.php
new file mode 100644
index 0000000..1231e6b
--- /dev/null
+++ b/web/app/controllers/super_manage_old.php
@@ -0,0 +1,867 @@
+<?php
+	requireLib('bootstrap5');
+	requireLib('md5');
+	requireLib('jquery.query');
+	requirePHPLib('form');
+	requirePHPLib('judger');
+	
+	if (!isSuperUser($myUser)) {
+		become403Page();
+	}
+
+	$register_form = new UOJForm('register');
+	$register_form->submit_button_config['align'] = 'compressed';
+	$register_form->addInput('new_username', 'text', '用户名', '',
+		function ($new_username) {
+			if (!validateUsername($new_username)) {
+				return '用户名不合法';
+			}
+			if (queryUser($new_username)) {
+				return '该用户已存在';
+			}
+			return '';
+		},
+		null
+	);
+	$register_form->addInput('new_password', 'password', '密码', '',
+		function ($new_password) {
+			return '';
+		},
+		null
+	);
+	$register_form->addInput('new_realname', 'text', '真实姓名', '',
+		function ($new_realname) {
+			return '';
+		},
+		null
+	);
+	$register_form->addInput('new_school', 'text', '学校名称', '',
+		function ($new_school) {
+			return '';
+		},
+		null
+	);
+	$register_form->handle = function() {
+		$new_username = $_POST['new_username'];
+		$new_password = $_POST['new_password'];
+		$new_realname = DB::escape($_POST['new_realname']);
+		$new_school = DB::escape($_POST['new_school']);
+		$new_password = hash_hmac('md5', $new_password, getPasswordClientSalt());
+		$new_password = getPasswordToStore($new_password, $new_username);
+		$svn_pw = uojRandString(10);
+
+		DB::query("insert into user_info (username, realname, school, password, svn_password, register_time, usergroup) values ('$new_username', '$new_realname', '$new_school', '$new_password', '$svn_pw', now(), 'U')");
+	};
+	$register_form->runAtServer();
+
+	$change_password_form = new UOJForm('change_password');
+	$change_password_form->submit_button_config['align'] = 'compressed';
+	$change_password_form->addInput('p_username', 'text', '用户名', '',
+		function ($p_username) {
+			if (!validateUsername($p_username)) {
+				return '用户名不合法';
+			}
+			if (!queryUser($p_username)) {
+				return '用户不存在';
+			}
+			return '';
+		},
+		null
+	);
+	$change_password_form->addInput('p_password', 'password', '密码', '',
+		function ($p_password) {
+			return '';
+		},
+		null
+	);
+	$change_password_form->handle = function() {
+		$p_username = $_POST['p_username'];
+		$p_password = $_POST['p_password'];
+		$p_password = hash_hmac('md5', $p_password, getPasswordClientSalt());
+		$p_password = getPasswordToStore($p_password, $p_username);
+
+		DB::query("update user_info set password = '$p_password' where username = '$p_username'");
+	};
+	$change_password_form->runAtServer();
+
+	$change_realname_form = new UOJForm('change_realname');
+	$change_realname_form->submit_button_config['align'] = 'compressed';
+	$change_realname_form->addInput('r_username', 'text', '用户名', '',
+		function ($r_username) {
+			if (!validateUsername($r_username)) {
+				return '用户名不合法';
+			}
+			if (!queryUser($r_username)) {
+				return '用户不存在';
+			}
+			return '';
+		},
+		null
+	);
+	$change_realname_form->addInput('r_realname', 'text', '真实姓名', '',
+		function ($r_realname) {
+			return '';
+		},
+		null
+	);
+	$change_realname_form->handle = function() {
+		$r_username = $_POST['r_username'];
+		$r_realname = DB::escape($_POST['r_realname']);
+
+		DB::query("update user_info set realname = '$r_realname' where username = '$r_username'");
+	};
+	$change_realname_form->runAtServer();
+
+	$change_school_form = new UOJForm('change_school');
+	$change_school_form->submit_button_config['align'] = 'compressed';
+	$change_school_form->addInput('s_username', 'text', '用户名', '',
+		function ($s_username) {
+			if (!validateUsername($s_username)) {
+				return '用户名不合法';
+			}
+			if (!queryUser($s_username)) {
+				return '用户不存在';
+			}
+			return '';
+		},
+		null
+	);
+	$change_school_form->addInput('s_school', 'text', '学校名称', '',
+		function ($s_school) {
+			return '';
+		},
+		null
+	);
+	$change_school_form->handle = function() {
+		$s_username = $_POST['s_username'];
+		$s_school = DB::escape($_POST['s_school']);
+
+		DB::query("update user_info set school = '$s_school' where username = '$s_username'");
+	};
+	$change_school_form->runAtServer();
+
+	$user_form = new UOJForm('user');
+	$user_form->submit_button_config['align'] = 'compressed';
+	$user_form->addInput('username', 'text', '用户名', '',
+		function ($username) {
+			if (!validateUsername($username)) {
+				return '用户名不合法';
+			}
+			if (!queryUser($username)) {
+				return '用户不存在';
+			}
+			return '';
+		},
+		null
+	);
+	$options = array(
+		'banneduser' => '设为封禁用户',
+		'normaluser' => '设为普通用户',
+		'superuser' => '设为超级用户'
+	);
+	$user_form->addSelect('op_type', $options, '操作类型', '');
+	$user_form->handle = function() {
+		global $user_form;
+		
+		$username = $_POST['username'];
+		switch ($_POST['op_type']) {
+			case 'banneduser':
+				DB::update("update user_info set usergroup = 'B' where username = '{$username}'");
+				DB::update("update user_info set usertype = 'banned' where username = '{$username}'");
+				break;
+			case 'normaluser':
+				DB::update("update user_info set usergroup = 'U' where username = '{$username}'");
+				DB::update("update user_info set usertype = 'student' where username = '{$username}'");
+				break;
+			case 'superuser':
+				DB::update("update user_info set usergroup = 'S' where username = '{$username}'");
+				DB::update("update user_info set usertype = 'student' where username = '{$username}'");
+				break;
+		}
+	};
+	$user_form->runAtServer();
+
+	$usertype_form = new UOJForm('usertype');
+	$user_form->submit_button_config['align'] = 'compressed';
+	$usertype_form->addInput('usertype_username', 'text', '用户名', '',
+		function ($username) {
+			if (!validateUsername($username)) {
+				return '用户名不合法';
+			}
+			if (!queryUser($username)) {
+				return '用户不存在';
+			}
+			return '';
+		},
+		null
+	);
+	$usertype_options = array(
+		'student' => '学生',
+		'teacher' => '老师',
+		'problem_uploader' => '题目上传者',
+		'problem_manager' => '题目管理员',
+		'contest_judger' => '比赛评测员',
+		'contest_only' => '仅比赛参加者',
+	);
+	$usertype_form->addSelect('usertype_type', $usertype_options, '角色', '');
+	$usertype_form->addSelect('usertype_op', array('add' => '添加', 'remove' => '移除'), '操作', '');
+	$usertype_form->handle = function() {
+		global $usertype_form;
+
+		$username = $_POST['usertype_username'];
+		$user = queryUser($username);
+		switch ($_POST['usertype_type']) {
+			case 'teacher':
+				if ($_POST['usertype_op'] === 'add') {
+					$user = addUserType($user, 'teacher');
+					$user = removeUserType($user, 'student');
+				} else {
+					$user = removeUserType($user, 'teacher');
+					$user = addUserType($user, 'student');
+				}
+				break;
+			case 'problem_manager':
+				if ($_POST['usertype_op'] === 'add') {
+					$user = addUserType($user, 'problem_manager');
+					$user = removeUserType($user, 'problem_uploader');
+				} else {
+					$user = removeUserType($user, 'problem_manager');
+				}
+				break;
+			case 'student':
+			case 'problem_uploader':
+			case 'contest_judger':
+			case 'contest_only':
+				$user = $_POST['usertype_op'] === 'add'
+					? addUserType($user, $_POST['usertype_type'])
+					: removeUserType($user, $_POST['usertype_type']);
+				break;
+		}
+
+		DB::update("update user_info set usertype = '{$user['usertype']}' where username = '{$username}'");
+	};
+	$usertype_form->runAtServer();
+	
+	$blog_link_index = new UOJForm('blog_link_index');
+	$blog_link_index->addInput('blog_id2', 'text', '博客ID', '',
+		function ($x) {
+			if (!validateUInt($x)) {
+				return 'ID不合法';
+			}
+			if (!queryBlog($x)) {
+				return '博客不存在';
+			}
+			return '';
+		},
+		null
+	);
+	$blog_link_index->addInput('blog_level', 'text', '置顶级别（删除不用填）', '0',
+		function ($x) {
+			if (!validateUInt($x)) {
+				return '数字不合法';
+			}
+			if ($x > 3) {
+				return '该级别不存在';
+			}
+			return '';
+		},
+		null
+	);
+	$options = array(
+		'add' => '添加',
+		'del' => '删除'
+	);
+	$blog_link_index->addSelect('op-type2', $options, '操作类型', '');
+	$blog_link_index->handle = function() {
+		$blog_id = $_POST['blog_id2'];
+		$blog_level = $_POST['blog_level'];
+		if ($_POST['op-type2'] == 'add') {
+			if (DB::selectFirst("select * from important_blogs where blog_id = {$blog_id}")) {
+				DB::update("update important_blogs set level = {$blog_level} where blog_id = {$blog_id}");
+			} else {
+				DB::insert("insert into important_blogs (blog_id, level) values ({$blog_id}, {$blog_level})");
+			}
+		}
+		if ($_POST['op-type2'] == 'del') {
+			DB::delete("delete from important_blogs where blog_id = {$blog_id}");
+		}
+	};
+	$blog_link_index->runAtServer();
+	
+	$blog_deleter = new UOJForm('blog_deleter');
+	$blog_deleter->addInput('blog_del_id', 'text', '博客ID', '',
+		function ($x) {
+			if (!validateUInt($x)) {
+				return 'ID不合法';
+			}
+			if (!queryBlog($x)) {
+				return '博客不存在';
+			}
+			return '';
+		},
+		null
+	);
+	$blog_deleter->handle = function() {
+		deleteBlog($_POST['blog_del_id']);
+	};
+	$blog_deleter->runAtServer();
+
+	$countdown_adder = new UOJForm('new_countdown');
+	$countdown_adder->submit_button_config['align'] = 'compressed';
+	$countdown_adder->addInput('new_countdown_title', 'text', '标题', '',
+		function ($new_countdown_title) {
+			return '';
+		},
+		null
+	);
+	$countdown_adder->addInput('new_countdown_endtime', 'text', '截止日期', date("Y-m-d H:i:s"),
+		function($str, &$vdata) {
+			try {
+				$vdata['new_countdown_endtime'] = new DateTime($str);
+			} catch (Exception $e) {
+				return '无效时间格式';
+			}
+			return '';
+		},
+		null
+	);
+	$countdown_adder->handle = function() {
+		$new_countdown_title = $_POST['new_countdown_title'];
+		$new_countdown_endtime = $_POST['new_countdown_endtime'];
+		$esc_countdown_title = DB::escape($new_countdown_title);
+
+		DB::query("insert into countdowns (title, endtime) values ('$esc_countdown_title', '$new_countdown_endtime')");
+	};
+	$countdown_adder->runAtServer();
+
+	$countdown_deleter = new UOJForm('delete_countdown');
+	$countdown_deleter->submit_button_config['align'] = 'compressed';
+	$countdown_deleter->addInput('delete_countdown_id', 'text', 'ID', '',
+		function ($x) {
+			if (!validateUInt($x)) {
+				return 'ID不合法';
+			}
+
+			if (!DB::selectFirst("select * from countdowns where id = $x")) {
+				return '倒计时不存在';
+			}
+
+			return '';
+		},
+		null
+	);
+	$countdown_deleter->handle = function() {
+		$delete_countdown_id = $_POST['delete_countdown_id'];
+
+		DB::query("delete from countdowns where id = $delete_countdown_id");
+	};
+	$countdown_deleter->runAtServer();
+
+	$countdowns_header_row = <<<EOD
+	<tr>
+		<th>ID</th>
+		<th>标题</th>
+		<th>时间</th>
+	</tr>
+EOD;
+	$countdowns_print_row = function($row) {
+		echo <<<EOD
+	<tr>
+		<td>{$row['id']}</td>
+		<td>{$row['title']}</td>
+		<td>{$row['endtime']}</td>
+	</tr>
+EOD;
+	};
+
+	$friend_link_adder = new UOJForm('new_friend_link');
+	$friend_link_adder->submit_button_config['align'] = 'compressed';
+	$friend_link_adder->addInput('new_friend_link_title', 'text', '名称', '',
+		function ($str) {
+			return '';
+		},
+		null
+	);
+	$friend_link_adder->addInput('new_friend_link_url', 'text', '链接', '',
+		function($str) {
+			if (!validateURL($str)) {
+				return '链接不合法';
+			}
+
+			return '';
+		},
+		null
+	);
+	$friend_link_adder->addInput('new_friend_link_level', 'text', '权重', '10',
+		function($str) {
+			if (!validateUInt($str)) {
+				return '权重必须是数字';
+			}
+
+			return '';
+		},
+		null
+	);
+	$friend_link_adder->handle = function() {
+		$new_friend_link_title = $_POST['new_friend_link_title'];
+		$new_friend_link_url = $_POST['new_friend_link_url'];
+		$new_friend_link_level = $_POST['new_friend_link_level'];
+		$esc_new_friend_link_title = DB::escape($new_friend_link_title);
+		$esc_new_friend_link_url = DB::escape($new_friend_link_url);
+
+		DB::query("insert into friend_links (title, url, level) values ('$esc_new_friend_link_title', '$esc_new_friend_link_url', $new_friend_link_level)");
+	};
+	$friend_link_adder->runAtServer();
+
+	$friend_link_deleter = new UOJForm('delete_friend_link');
+	$friend_link_deleter->submit_button_config['align'] = 'compressed';
+	$friend_link_deleter->addInput('delete_friend_link_id', 'text', 'ID', '',
+		function ($id) {
+			if (!validateUInt($id)) {
+				return 'ID不合法';
+			}
+
+			if (!DB::selectFirst("select * from friend_links where id = $id")) {
+				return 'ID不存在';
+			}
+
+			return '';
+		},
+		null
+	);
+	$friend_link_deleter->handle = function() {
+		$delete_friend_link_id = $_POST['delete_friend_link_id'];
+
+		DB::query("delete from friend_links where id = $delete_friend_link_id");
+	};
+	$friend_link_deleter->runAtServer();
+
+	$friend_links_header_row = <<<EOD
+	<tr>
+		<th>ID</th>
+		<th>名称</th>
+		<th>链接</th>
+		<th>置顶等级</th>
+	</tr>
+EOD;
+	$friend_links_print_row = function($row) {
+		echo <<<EOD
+	<tr>
+		<td>{$row['id']}</td>
+		<td>{$row['title']}</td>
+		<td>{$row['url']}</td>
+		<td>{$row['level']}</td>
+	</tr>
+EOD;
+	};
+
+	$contest_submissions_deleter = new UOJForm('contest_submissions');
+	$contest_submissions_deleter->addInput('contest_id', 'text', '比赛ID', '',
+		function ($x) {
+			if (!validateUInt($x)) {
+				return 'ID不合法';
+			}
+			if (!queryContest($x)) {
+				return '博客不存在';
+			}
+			return '';
+		},
+		null
+	);
+	$contest_submissions_deleter->handle = function() {
+		$contest = queryContest($_POST['contest_id']);
+		genMoreContestInfo($contest);
+		
+		$contest_problems = DB::selectAll("select problem_id from contests_problems where contest_id = {$contest['id']}");
+		foreach ($contest_problems as $problem) {
+			$submissions = DB::selectAll("select * from submissions where problem_id = {$problem['problem_id']} and submit_time < '{$contest['start_time_str']}'");
+			foreach ($submissions as $submission) {
+				$content = json_decode($submission['content'], true);
+				unlink(UOJContext::storagePath().$content['file_name']);
+				DB::delete("delete from submissions where id = {$submission['id']}");
+				updateBestACSubmissions($submission['submitter'], $submission['problem_id']);
+			}
+		}
+	};
+	$contest_submissions_deleter->runAtServer();
+
+	$custom_test_deleter = new UOJForm('custom_test_deleter');
+	$custom_test_deleter->addInput('last', 'text', '删除末尾记录', '5',
+		function ($x, &$vdata) {
+			if (!validateUInt($x)) {
+				return '不合法';
+			}
+			$vdata['last'] = $x;
+			return '';
+		},
+		null
+	);
+	$custom_test_deleter->handle = function(&$vdata) {
+		$all = DB::selectAll("select * from custom_test_submissions order by id asc limit {$vdata['last']}");
+		foreach ($all as $submission) {
+			$content = json_decode($submission['content'], true);
+			unlink(UOJContext::storagePath().$content['file_name']);
+		}
+		DB::delete("delete from custom_test_submissions order by id asc limit {$vdata['last']}");
+	};
+	$custom_test_deleter->runAtServer();
+
+	$judger_adder = new UOJForm('judger_adder');
+	$judger_adder->addInput('judger_adder_name', 'text', '评测机名称', '',
+		function ($x, &$vdata) {
+			if (!validateUsername($x)) {
+				return '不合法';
+			}
+			if (DB::selectCount("select count(*) from judger_info where judger_name='$x'")!=0) {
+				return '不合法';
+			}
+			$vdata['name'] = $x;
+			return '';
+		},
+		null
+	);
+	$judger_adder->handle = function(&$vdata) {
+		$password=uojRandString(32);
+		DB::insert("insert into judger_info (judger_name,password) values('{$vdata['name']}','{$password}')");
+	};
+	$judger_adder->runAtServer();
+	
+	$judger_deleter = new UOJForm('judger_deleter');
+	$judger_deleter->addInput('judger_deleter_name', 'text', '评测机名称', '',
+		function ($x, &$vdata) {
+			if (!validateUsername($x)) {
+				return '不合法';
+			}
+			if (DB::selectCount("select count(*) from judger_info where judger_name='$x'")!=1) {
+				return '不合法';
+			}
+			$vdata['name'] = $x;
+			return '';
+		},
+		null
+	);
+	$judger_deleter->handle = function(&$vdata) {
+		DB::delete("delete from judger_info where judger_name='{$vdata['name']}'");
+	};
+	$judger_deleter->runAtServer();
+
+	$judgerlist_cols = array('judger_name', 'password');
+	$judgerlist_config = array();
+	$judgerlist_header_row = <<<EOD
+	<tr>
+		<th>评测机名称</th>
+		<th>密码</th>
+	</tr>
+EOD;
+	$judgerlist_print_row = function($row) {
+		echo <<<EOD
+			<tr>
+				<td>{$row['judger_name']}</td>
+				<td>{$row['password']}</td>
+			</tr>
+EOD;
+	};
+	
+	$userlist_cols = array('username', 'school', 'usergroup', 'usertype', 'register_time');
+	$userlist_config = array('page_len' => 20,
+			'table_classes' => array('table', 'table-bordered', 'table-hover', 'table-striped'));
+	$userlist_header_row = <<<EOD
+	<tr>
+		<th>用户名</th>
+		<th>学校</th>
+		<th style="width: 6em">用户类别</th>
+		<th style="width: 12em">注册时间</th>
+	</tr>
+EOD;
+
+	$cur_tab = isset($_GET['tab']) ? $_GET['tab'] : 'users';
+
+	$user_list_cond = array();
+	if ($cur_tab === 'users') {
+		if (isset($_GET['username']) && $_GET['username'] != "") {
+			$user_list_cond[] = "username like '%" . DB::escape($_GET['username']) . "%'";
+		}
+		if (isset($_GET['usergroup']) && $_GET['usergroup'] != "") {
+			$user_list_cond[] = "usergroup = '" . DB::escape($_GET['usergroup']) . "'";
+		}
+	}
+	if ($user_list_cond) {
+		$user_list_cond = join($user_list_cond, ' and ');
+	} else {
+		$user_list_cond = '1';
+	}
+
+	$userlist_print_row = function($row) {
+		$hislink = getUserLink($row['username']);
+		echo <<<EOD
+			<tr>
+				<td>${hislink}</td>
+				<td>{$row['school']}</td>
+				<td>{$row['usergroup']}, {$row['usertype']}</td>
+				<td>{$row['register_time']}</td>
+			</tr>
+EOD;
+	};
+
+	$image_hosting_cols = ['*'];
+	$image_hosting_config = ['page_len' => 20, 'table_classes' => ['table', 'table-bordered', 'table-hover', 'table-striped']];
+	$image_hosting_header_row = <<<EOD
+	<tr>
+		<th>ID</th>
+		<th>上传者</th>
+		<th>预览</th>
+		<th style="width: 3em">文件大小</th>
+		<th style="width: 12em">上传时间</th>
+	</tr>
+EOD;
+	$image_hosting_print_row = function($row) {
+		$user_link = getUserLink($row['uploader']);
+		if ($row['size'] < 1024 * 512) {
+			$size = strval(round($row['size'] * 1.0 / 1024, 1)) . ' KB';
+		} else {
+			$size = strval(round($row['size'] * 1.0 / 1024 / 1024, 1)) . ' MB';
+		}
+
+		echo <<<EOD
+	<tr>
+		<td>{$row['id']}</td>
+		<td>$user_link</td>
+		<td><img src="{$row['path']}" width="250"></td>
+		<td>$size</td>
+		<td>{$row['upload_time']}</td>
+	</tr>
+EOD;
+	};
+
+	$image_deleter = new UOJForm('image_deleter');
+	$image_deleter->submit_button_config['align'] = 'compressed';
+	$image_deleter->submit_button_config['text'] = '删除';
+	$image_deleter->submit_button_config['class_str'] = 'btn btn-danger';
+	$image_deleter->addInput('image_deleter_id', 'text', '图片 ID', '',
+		function ($x, &$vdata) {
+			if (!validateUInt($x)) {
+				return 'ID 不合法';
+			}
+			if (!DB::selectCount("select count(*) from users_images where id = $x")) {
+				return '图片不存在';
+			}
+			$vdata['id'] = $x;
+			return '';
+		},
+		null
+	);
+	$image_deleter->handle = function(&$vdata) {
+		$id = $vdata['id'];
+		$result = DB::selectFirst("SELECT * from users_images WHERE id = $id");
+		unlink(UOJContext::storagePath().$result['path']);
+		DB::delete("DELETE FROM users_images WHERE id = $id");
+	};
+	$image_deleter->runAtServer();
+
+	$change_user_image_total_size_limit_form = new UOJForm('change_user_image_total_size_limit');
+	$change_user_image_total_size_limit_form->submit_button_config['align'] = 'compressed';
+	$change_user_image_total_size_limit_form->addInput('change_user_image_total_size_limit_username', 'text', '用户名', '',
+		function ($x, &$vdata) {
+			if (!validateUsername($x)) {
+				return '用户名不合法';
+			}
+			if (!queryUser($x)) {
+				return '用户不存在';
+			}
+			$vdata['username'] = $x;
+			return '';
+		},
+		null
+	);
+	$change_user_image_total_size_limit_form->addInput('change_user_image_total_size_limit_limit', 'text', '存储限制（单位：Byte）', '104857600',
+		function ($x, &$vdata) {
+			if (!validateUInt($x, 10)) {
+				return '限制不合法';
+			}
+			if (intval($x) > 2147483648) {
+				return '限制不能大于 2 GB';
+			}
+			$vdata['limit'] = $x;
+			return '';
+		},
+		null
+	);
+	$change_user_image_total_size_limit_form->handle = function(&$vdata) {
+		DB::update("UPDATE user_info SET images_size_limit = {$vdata['limit']} WHERE username = '{$vdata['username']}'");
+	};
+	$change_user_image_total_size_limit_form->runAtServer();
+
+	$tabs_info = array(
+		'users' => array(
+			'name' => '用户管理',
+			'url' => "/super-manage/users"
+		),
+		'blogs' => array(
+			'name' => '博客管理',
+			'url' => "/super-manage/blogs"
+		),
+		'index' => array(
+			'name' => '首页管理',
+			'url' => '/super-manage/index'
+		),
+		'submissions' => array(
+			'name' => '提交记录',
+			'url' => "/super-manage/submissions"
+		),
+		'custom-test' => array(
+			'name' => '自定义测试',
+			'url' => '/super-manage/custom-test'
+		),
+		'judger' => array(
+			'name' => '评测机管理',
+			'url' => '/super-manage/judger'
+		),
+		'image_hosting' => array(
+			'name' => '图床管理',
+			'url' => '/super-manage/image_hosting'
+		)
+	);
+	
+	if (!isset($tabs_info[$cur_tab])) {
+		become404Page();
+	}
+	?>
+<?php
+	requireLib('shjs');
+	requireLib('morris');
+	?>
+<?php echoUOJPageHeader('系统管理') ?>
+<div class="row">
+	<div class="col-sm-3">
+		<?= HTML::tablist($tabs_info, $cur_tab, 'nav-pills flex-column') ?>
+	</div>
+	
+	<div class="col-sm-9">
+		<?php if ($cur_tab === 'users'): ?>
+			<h3>添加新用户</h3>
+			<?php $register_form->printHTML(); ?>
+			<h3>修改用户密码</h3>
+			<?php $change_password_form->printHTML(); ?>
+			<h3>用户类别设置</h3>
+			<p>在此处更新用户所属类别后会自动重置用户权限。</p>
+			<?php $user_form->printHTML(); ?>
+			<h3>用户权限管理</h3>
+			<?php $usertype_form->printHTML(); ?>
+			<h3>修改用户真实姓名</h3>
+			<?php $change_realname_form->printHTML(); ?>
+			<h3>修改用户学校名称</h3>
+			<?php $change_school_form->printHTML(); ?>
+			<h3>用户名单</h3>
+			<div id="user-query">
+				<form class="form-horizontal uoj-form-compressed" target="_self" method="GET">
+					<div class="form-group">
+						<label for="username" class="col-sm-2 control-label">用户名</label>
+						<div class="col-sm-3">
+							<input type="text" class="form-control" name="username" id="user-query-username" value="" />
+						</div>
+					</div>
+					<div class="form-group">
+						<label for="usergroup" class="col-sm-2 control-label">用户类别</label>
+						<div class="col-sm-3">
+							<select class="form-control" id="user-query-usergroup" name="usergroup">
+								<option value="">*: 所有用户</option>
+								<option value="B">B: 封禁用户</option>
+								<option value="U">U: 普通用户</option>
+								<option value="S">S: 超级用户</option>
+							</select>
+						</div>
+					</div><div class="text-center"><button type="submit" id="user-query-submit" class="mt-2 btn btn-secondary">查询</button></div>
+				</form>
+			</div>
+			<?php echoLongTable($userlist_cols, 'user_info', $user_list_cond, 'order by username asc', $userlist_header_row, $userlist_print_row, $userlist_config) ?>
+		<?php elseif ($cur_tab === 'blogs'): ?>
+			<div>
+				<h4>添加到公告</h4>
+				<?php $blog_link_index->printHTML(); ?>
+			</div>
+		
+			<div>
+				<h4>删除博客</h4>
+				<?php $blog_deleter->printHTML(); ?>
+			</div>
+		<?php elseif ($cur_tab === 'index'): ?>
+			<div>
+				<h4>倒计时</h4>
+				<?php echoLongTable(array('id', 'title', 'endtime'), 'countdowns', '1', 'order by endtime asc', $countdowns_header_row, $countdowns_print_row, $userlist_config) ?>
+				<h5>添加倒计时</h5>
+				<?php $countdown_adder->printHTML(); ?>
+				<h5>删除倒计时</h5>
+				<?php $countdown_deleter->printHTML(); ?>
+
+				<h4>友情链接</h4>
+				<?php echoLongTable(array('id', 'title', 'url', 'level'), 'friend_links', '1', 'order by level desc, id asc', $friend_links_header_row, $friend_links_print_row, $userlist_config) ?>
+				<h5>添加友情链接</h5>
+				<?php $friend_link_adder->printHTML(); ?>
+				<h5>删除友情链接</h5>
+				<?php $friend_link_deleter->printHTML(); ?>
+			</div>
+		<?php elseif ($cur_tab === 'submissions'): ?>
+			<div>
+				<h4>删除赛前提交记录</h4>
+				<?php $contest_submissions_deleter->printHTML(); ?>
+			</div>
+			<div>
+				<h4>测评失败的提交记录</h4>
+				<?php echoSubmissionsList("result_error = 'Judgement Failed'", 'order by id desc', array('result_hidden' => ''), $myUser); ?>
+			</div>
+		<?php elseif ($cur_tab === 'custom-test'): ?>
+		<?php $custom_test_deleter->printHTML() ?>
+		<?php
+				$submissions_pag = new Paginator(array(
+					'col_names' => array('*'),
+					'table_name' => 'custom_test_submissions',
+					'cond' => '1',
+					'tail' => 'order by id asc',
+					'page_len' => 5
+				));
+			foreach ($submissions_pag->get() as $submission) {
+				$problem = queryProblemBrief($submission['problem_id']);
+				$submission_result = json_decode($submission['result'], true);
+				echo '<dl class="dl-horizontal">';
+				echo '<dt>id</dt>';
+				echo '<dd>', "#{$submission['id']}", '</dd>';
+				echo '<dt>problem_id</dt>';
+				echo '<dd>', "#{$submission['problem_id']}", '</dd>';
+				echo '<dt>submit time</dt>';
+				echo '<dd>', $submission['submit_time'], '</dd>';
+				echo '<dt>submitter</dt>';
+				echo '<dd>', $submission['submitter'], '</dd>';
+				echo '<dt>judge_time</dt>';
+				echo '<dd>', $submission['judge_time'], '</dd>';
+				echo '</dl>';
+				echoSubmissionContent($submission, getProblemCustomTestRequirement($problem));
+				echoCustomTestSubmissionDetails($submission_result['details'], "submission-{$submission['id']}-details");
+			}
+			?>
+		<?= $submissions_pag->pagination() ?>
+		<?php elseif ($cur_tab === 'judger'): ?>
+			<div>
+				<h4>添加评测机</h4>
+				<?php $judger_adder->printHTML(); ?>
+			</div>
+			<div>
+				<h4>删除评测机</h4>
+				<?php $judger_deleter->printHTML(); ?>
+			</div>
+			<h3>评测机列表</h3>
+			<?php echoLongTable($judgerlist_cols, 'judger_info', "1=1", '', $judgerlist_header_row, $judgerlist_print_row, $judgerlist_config) ?>
+		<?php elseif ($cur_tab === 'image_hosting'): ?>
+			<h3>图床管理</h3>
+			<?php echoLongTable($image_hosting_cols, 'users_images', "1=1", 'order by id desc', $image_hosting_header_row, $image_hosting_print_row, $image_hosting_config) ?>
+			<div>
+				<h4>删除图片</h4>
+				<?php $image_deleter->printHTML() ?>
+			</div>
+			<div>
+				<h4>修改用户存储上限</h4>
+				<?php $change_user_image_total_size_limit_form->printHTML() ?>
+			</div>
+		<?php endif ?>
+	</div>
+</div>
+<?php echoUOJPageFooter() ?>
diff --git a/web/app/controllers/user_info_edit.php b/web/app/controllers/user_info_edit.php
index dbd9f49..a79092c 100644
--- a/web/app/controllers/user_info_edit.php
+++ b/web/app/controllers/user_info_edit.php
@@ -341,7 +341,7 @@ EOD);
 				</div>
 				<?php if (isSuperUser($myUser) && $user['username'] != $myUser['username']): ?>
 				<div class="alert alert-warning mb-0" role="alert">
-					如需重置其他用户的密码，请前往 <a href="/super-manage/users" class="alert-link">系统管理</a> 页面操作。
+					如需重置其他用户的密码，请前往 <a href="/super_manage/users" class="alert-link">系统管理</a> 页面操作。
 				</div>
 				<?php endif ?>
 
diff --git a/web/app/libs/uoj-form-lib.php b/web/app/libs/uoj-form-lib.php
index 897111a..18560c2 100644
--- a/web/app/libs/uoj-form-lib.php
+++ b/web/app/libs/uoj-form-lib.php
@@ -111,7 +111,7 @@ EOD;
 	<label for="input-$name" class="col-sm-2 control-label">$label_text</label>
 	<div class="col-sm-3">
 		<input type="$type" class="form-control" name="$name" id="input-$name" value="$default_value" />
-		<span class="help-block" id="help-$name"></span>
+		<span class="help-block invalid-feedback" id="help-$name"></span>
 	</div>
 </div>
 EOD;
@@ -197,7 +197,7 @@ EOD;
 	<label for="input-$name" class="col-sm-2 control-label">$label_text</label>
 	<div class="col-sm-10">
 		<textarea class="form-control" name="$name" id="input-$name">$default_value</textarea>
-		<span class="help-block" id="help-$name"></span>
+		<span class="help-block invalid-feedback" id="help-$name"></span>
 	</div>
 </div>
 EOD;
@@ -210,7 +210,7 @@ EOD;
 <div id="div-$name" class="form-group">
 	<label for="input-$name" class="control-label">$label_text</label>
 	<textarea class="form-control" name="$name" id="input-$name">$default_value</textarea>
-	<span class="help-block" id="help-$name"></span>
+	<span class="help-block invalid-feedback" id="help-$name"></span>
 </div>
 EOD;
 			$this->add($name, $html, $validator_php, $validator_js, $no_val);
@@ -270,7 +270,7 @@ EOD;
 <div id="div-$name">
 	<label for="input-$name" class="control-label">$label_text</label>
 	<textarea class="ckeditor" name="$name" id="input-$name">$default_value</textarea>
-	<span class="help-block" id="help-$name"></span>
+	<span class="help-block invalid-feedback" id="help-$name"></span>
 </div>
 EOD;
 			$this->add($name, $html, $validator_php, $validator_js);
@@ -333,7 +333,7 @@ EOD
 <div id="div-$name">
 	<label for="input-$name" class="control-label">$label_text</label>
 	<textarea name="$name" id="input-$name">$default_value</textarea>
-	<span class="help-block" id="help-$name"></span>
+	<span class="help-block invalid-feedback" id="help-$name"></span>
 </div>
 <script type="text/javascript">
 $('#input-$name').slide_editor();
@@ -794,7 +794,7 @@ EOD;
 			<button type="button" class="btn btn-primary" style="width:100px; !important" onclick="$('#input-{$name}').click();"><span class="glyphicon glyphicon-folder-open"></span> $browse_text</button>
 		</span>
 	</div>
-	<span class="help-block" id="help-{$name}"></span>
+	<span class="help-block invalid-feedback" id="help-{$name}"></span>
 </div>
 EOD;
 		
diff --git a/web/app/route.php b/web/app/route.php
index f4f2789..5932527 100644
--- a/web/app/route.php
+++ b/web/app/route.php
@@ -58,6 +58,7 @@ Route::group([
 		}
 		Route::any('/blogs/{id}', '/blog_show.php');
 		Route::any('/post/{id}', '/blog_show.php');
+		Route::any('/post/{id}/write', '/blog_show.php?sub=%2Fwrite');
 		
 		Route::any('/announcements', '/announcements.php');
 		
@@ -76,7 +77,8 @@ Route::group([
 		Route::any('/user_msg', '/user_msg.php');
 		Route::any('/user/{username}/system_msg', '/user_system_msg.php');
 
-		Route::any('/super-manage(?:/{tab})?', '/super_manage.php');
+		Route::any('/super-manage(?:/{tab})?', '/super_manage_old.php');
+		Route::any('/super_manage(?:/{tab})?', '/super_manage.php');
 		
 		Route::any('/download.php', '/download.php');
 		
diff --git a/web/app/views/blog-nav.php b/web/app/views/blog-nav.php
index 5f40b83..ae040d3 100644
--- a/web/app/views/blog-nav.php
+++ b/web/app/views/blog-nav.php
@@ -145,7 +145,7 @@ mb-4" role="navigation">
 						</li>
 						<?php if (isSuperUser(Auth::user())): ?>
 							<li>
-								<a class="dropdown-item" href="<?= HTML::url('/super-manage') ?>">
+								<a class="dropdown-item" href="<?= HTML::url('/super_manage') ?>">
 									<?= UOJLocale::get('system manage') ?>
 								</a>
 							</li>
diff --git a/web/app/views/main-nav.php b/web/app/views/main-nav.php
index 7a3c40c..6adc9e4 100644
--- a/web/app/views/main-nav.php
+++ b/web/app/views/main-nav.php
@@ -212,7 +212,7 @@ mb-4" role="navigation">
 						</li>
 						<?php if (isSuperUser(Auth::user())): ?>
 							<li>
-								<a class="dropdown-item" href="<?= HTML::url('/super-manage') ?>">
+								<a class="dropdown-item" href="<?= HTML::url('/super_manage') ?>">
 									<?= UOJLocale::get('system manage') ?>
 								</a>
 							</li>
diff --git a/web/js/uoj.js b/web/js/uoj.js
index 3c1f465..513b4ce 100644
--- a/web/js/uoj.js
+++ b/web/js/uoj.js
@@ -576,18 +576,38 @@ $.fn.long_table = function(data, cur_page, header_row, get_row_str, config) {
 		if (n_pages > 1) {
 			var pagination = $('<ul class="pagination top-buffer-no bot-buffer-sm justify-content-center"></ul>');
 			if (cur_page > 1) {
-				pagination.append(get_page_li(cur_page - 1, '<span class="glyphicon glyphicon glyphicon-backward"></span>'));
+				if (isBootstrap5Page) {
+					pagination.append(get_page_li(1, '<i class="bi bi-chevron-double-left"></i>'));
+					pagination.append(get_page_li(cur_page - 1, '<i class="bi bi-chevron-left"></i>'));
+				} else {
+					pagination.append(get_page_li(cur_page - 1, '<span class="glyphicon glyphicon glyphicon-backward"></span>'));
+				}
 			} else {
-				pagination.append(get_page_li(-1, '<span class="glyphicon glyphicon glyphicon-backward"></span>'));
+				if (isBootstrap5Page) {
+					pagination.append(get_page_li(-1, '<i class="bi bi-chevron-double-left"></i>'));
+					pagination.append(get_page_li(-1, '<i class="bi bi-chevron-left"></i>'));
+				} else {
+					pagination.append(get_page_li(-1, '<span class="glyphicon glyphicon glyphicon-backward"></span>'));
+				}
 			}
 			var max_extend = config.max_extend != undefined ? config.max_extend : 5;
 			for (var i = Math.max(cur_page - max_extend, 1); i <= Math.min(cur_page + max_extend, n_pages); i++) {
 				pagination.append(get_page_li(i, i.toString()));
 			}
 			if (cur_page < n_pages) {
-				pagination.append(get_page_li(cur_page + 1, '<span class="glyphicon glyphicon glyphicon-forward"></span>'));
+				if (isBootstrap5Page) {
+					pagination.append(get_page_li(cur_page + 1, '<i class="bi bi-chevron-right"></i>'));
+					pagination.append(get_page_li(n_pages, '<i class="bi bi-chevron-double-right"></i>'));
+				} else {
+					pagination.append(get_page_li(cur_page + 1, '<span class="glyphicon glyphicon glyphicon-forward"></span>'));
+				}
 			} else {
-				pagination.append(get_page_li(-1, '<span class="glyphicon glyphicon glyphicon-forward"></span>'));
+				if (isBootstrap5Page) {
+					pagination.append(get_page_li(-1, '<i class="bi bi-chevron-right"></i>'));
+					pagination.append(get_page_li(-1, '<i class="bi bi-chevron-double-right"></i>'));
+				} else {
+					pagination.append(get_page_li(-1, '<span class="glyphicon glyphicon glyphicon-forward"></span>'));
+				}
 			}
 			$(table_div).append($('<div class="text-center"></div>').append(pagination));
 		}