diff --git a/src/admin/controllers/clients/view.php b/src/admin/controllers/clients/view.php
index 0824898..4d45321 100755
--- a/src/admin/controllers/clients/view.php
+++ b/src/admin/controllers/clients/view.php
@@ -25,5 +25,5 @@ foreach ($countries as $country) {
 }
 
 $count_account = $DB->count('account', array('account_client_id' => $ClientInfo['client_id']));
-$count_ssl = $DB->count('ssl', array('ssl_for' => $ClientInfo['client_id']));
-$count_tickets = $DB->count('tickets', array('ticket_for' => $ClientInfo['client_id']));
+$count_ssl = $DB->count('ssl', array('ssl_client_id' => $ClientInfo['client_id']));
+$count_tickets = $DB->count('tickets', array('ticket_client_id' => $ClientInfo['client_id']));
diff --git a/src/admin/controllers/tickets/close.php b/src/admin/controllers/tickets/close.php
index 8e323bc..71f5955 100755
--- a/src/admin/controllers/tickets/close.php
+++ b/src/admin/controllers/tickets/close.php
@@ -9,7 +9,7 @@ if (!$ticket_id) {
 }
 
 // 查找工单信息
-$TicketInfo = $DB->find('tickets', 'ticket_email, ticket_for', array('ticket_id' => $ticket_id), null, 1);
+$TicketInfo = $DB->find('tickets', 'ticket_email, ticket_client_id', array('ticket_id' => $ticket_id), null, 1);
 
 if (!$TicketInfo) {
     setMessage('Ticket Not Found !');
@@ -17,7 +17,7 @@ if (!$TicketInfo) {
 }
 
 // 查找客户信息
-$ClientInfo = $DB->find('clients', 'client_email, client_fname', array('client_id' => $TicketInfo['ticket_for']));
+$ClientInfo = $DB->find('clients', 'client_email, client_fname', array('client_id' => $TicketInfo['ticket_client_id']));
 
 if (!$ClientInfo) {
     setMessage('Client Not Found !');
diff --git a/src/admin/controllers/tickets/reply.php b/src/admin/controllers/tickets/reply.php
index 2fa0d4d..4448481 100755
--- a/src/admin/controllers/tickets/reply.php
+++ b/src/admin/controllers/tickets/reply.php
@@ -12,7 +12,7 @@ if (!$ticket_id) {
     exit('Access Denied');
 }
 
-$TicketInfo = $DB->find('tickets', 'ticket_email, ticket_for', array('ticket_id' => $ticket_id));
+$TicketInfo = $DB->find('tickets', 'ticket_email, ticket_client_id', array('ticket_id' => $ticket_id));
 
 if (!$TicketInfo) {
     exit('Access Denied');
@@ -46,7 +46,7 @@ if ($resault) {
         //         'email_subject' => 'Ticket Reply #' . $ticket_id,
         //         'email_date' => date('Y-m-d H:i:s'),
         //         'email_body' => $email_body,
-        //         'email_for' => $TicketInfo['ticket_for'],
+        //         'email_client_id' => $TicketInfo['ticket_client_id'],
         //         'email_read' => 0
         //     );
         //     print_r($email_insert);
diff --git a/src/clientarea/controllers/dashboard/view.php b/src/clientarea/controllers/dashboard/view.php
index f7aeb7a..422a9f9 100755
--- a/src/clientarea/controllers/dashboard/view.php
+++ b/src/clientarea/controllers/dashboard/view.php
@@ -1,12 +1,12 @@
 <?php
 
 $count_acc = $DB->count('account', array('account_client_id' => $ClientInfo['client_id'], 'account_status' => 1));
-$count_ssl = $DB->count('ssl', array('ssl_for' => $ClientInfo['client_id']));
+$count_ssl = $DB->count('ssl', array('ssl_client_id' => $ClientInfo['client_id']));
 
-// $count_tic1 = $DB->count('tickets', array('ticket_for' => $ClientInfo['client_id'], 'ticket_status' => 0));
-// $count_tic2 = $DB->count('tickets', array('ticket_for' => $ClientInfo['client_id'], 'ticket_status' => 1));
+// $count_tic1 = $DB->count('tickets', array('ticket_client_id' => $ClientInfo['client_id'], 'ticket_status' => 0));
+// $count_tic2 = $DB->count('tickets', array('ticket_client_id' => $ClientInfo['client_id'], 'ticket_status' => 1));
 // $count_tic = $count_tic1 + $count_tic2;
 
-$count_tic = $DB->getColumn("SELECT COUNT(*) FROM `pre_tickets` WHERE `ticket_for`='" . $ClientInfo['client_id'] . "' AND `ticket_status`=0 OR `ticket_for`='" . $ClientInfo['client_id'] . "' AND `ticket_status`=1");
+$count_tic = $DB->getColumn("SELECT COUNT(*) FROM `pre_tickets` WHERE `ticket_client_id`='" . $ClientInfo['client_id'] . "' AND `ticket_status`=0 OR `ticket_client_id`='" . $ClientInfo['client_id'] . "' AND `ticket_status`=1");
 
 $PageInfo['title'] = 'Dashboard';
diff --git a/src/clientarea/controllers/myssl/list.php b/src/clientarea/controllers/myssl/list.php
index fb62f25..899ce66 100755
--- a/src/clientarea/controllers/myssl/list.php
+++ b/src/clientarea/controllers/myssl/list.php
@@ -2,10 +2,10 @@
 
 require ROOT . '/core/library/userinfo.class.php';
 
-$count = $DB->count('ssl', array('ssl_for' => $ClientInfo['client_id']));
+$count = $DB->count('ssl', array('ssl_client_id' => $ClientInfo['client_id']));
 
 if ($count > 0) {
-    $rows = $DB->findAll('ssl', '*', array('ssl_for' => $ClientInfo['client_id']), "`ssl_id` DESC");
+    $rows = $DB->findAll('ssl', '*', array('ssl_client_id' => $ClientInfo['client_id']), "`ssl_id` DESC");
 
     require_once ROOT . '/core/handler/SSLHandler.php';
     require_once ROOT . '/modules/GoGetSSL/GoGetSSLApi.php';
diff --git a/src/clientarea/controllers/myssl/new.php b/src/clientarea/controllers/myssl/new.php
index 6f18d4f..abc62bc 100755
--- a/src/clientarea/controllers/myssl/new.php
+++ b/src/clientarea/controllers/myssl/new.php
@@ -78,7 +78,7 @@ $result = $apiClient->addSSLOrder($FormData);
 if (count($result) > 4) {
     $data = array(
         'ssl_key' => $result['order_id'],
-        'ssl_for' => $ClientInfo['client_id'],
+        'ssl_client_id' => $ClientInfo['client_id'],
     );
     $res = $DB->insert('ssl', $data);
 
diff --git a/src/clientarea/controllers/tickets/add.php b/src/clientarea/controllers/tickets/add.php
index 485d9a0..f31e2af 100755
--- a/src/clientarea/controllers/tickets/add.php
+++ b/src/clientarea/controllers/tickets/add.php
@@ -8,7 +8,7 @@ if (isset($_POST['submit'])) {
         'ticket_email' => post('email'),
         'ticket_content' => post('editor'),
         'ticket_department' => post('department'),
-        'ticket_for' => $ClientInfo['client_id'],
+        'ticket_client_id' => $ClientInfo['client_id'],
         'ticket_date' => date('Y-m-d H:i:s'),
         'ticket_status' => 0,
     );
diff --git a/src/clientarea/controllers/tickets/list.php b/src/clientarea/controllers/tickets/list.php
index 364770e..0701db8 100755
--- a/src/clientarea/controllers/tickets/list.php
+++ b/src/clientarea/controllers/tickets/list.php
@@ -4,8 +4,8 @@ $PageInfo['title'] = $lang->I18N('My Tickets');
 
 require_once ROOT . '/core/library/userinfo.class.php';
 
-$count = $DB->count('tickets', array('ticket_for' => $ClientInfo['client_id']));
+$count = $DB->count('tickets', array('ticket_client_id' => $ClientInfo['client_id']));
 
 if ($count > 0) {
-    $rows = $DB->findAll('tickets', '*', array('ticket_for' => $ClientInfo['client_id']), "`ticket_id` DESC");
+    $rows = $DB->findAll('tickets', '*', array('ticket_client_id' => $ClientInfo['client_id']), "`ticket_id` DESC");
 }
diff --git a/src/clientarea/controllers/tickets/view.php b/src/clientarea/controllers/tickets/view.php
index 069bd54..bf09d39 100755
--- a/src/clientarea/controllers/tickets/view.php
+++ b/src/clientarea/controllers/tickets/view.php
@@ -11,7 +11,7 @@ if (!$ticket_id) {
 
 $where = array(
     'ticket_id' => $ticket_id,
-    'ticket_for' => $ClientInfo['client_id'],
+    'ticket_client_id' => $ClientInfo['client_id'],
 );
 
 $TicketInfo = $DB->find('tickets', '*', $where, null, 1);
diff --git a/src/core/application.php b/src/core/application.php
index 8d6ee11..45a62bd 100755
--- a/src/core/application.php
+++ b/src/core/application.php
@@ -18,9 +18,11 @@ date_default_timezone_set('Asia/Shanghai');
 session_start();
 
 define('IN_CRONLITE', true);
-define('APP_VERSION', '1.1.0');
-define('DB_VERSION', '2020');
+define('APP_MODE', 'prod'); // prod, demo
+define('APP_VERSION', '2.0.3');
+define('DB_VERSION', '2021');
 define('APP_BRAND', 'UIISC');
+define('APP_DEBUG', false);
 define('APP_ROOT', dirname(__FILE__) . '/');
 define('ROOT', dirname(APP_ROOT));
 
@@ -65,7 +67,8 @@ define('DB_PREFIX', $dbconfig['prefix']);
 // Detect installation status 1
 if (!$dbconfig['username'] || !$dbconfig['password'] || !$dbconfig['dbname']) {
     header('Content-type:text/html;charset=utf-8');
-    exit('The system is not installed !<a href="/install/">Click to Install</a>');
+    echo '<p>The system is not installed ! (error code: 1002)</p><p><a href="/install/">Click to Install</a></p>';
+    exit();
 }
 
 $DB = new \lib\PdoHelper($dbconfig);
@@ -73,7 +76,8 @@ $DB = new \lib\PdoHelper($dbconfig);
 // Detect installation status 2
 if ($DB->query("SELECT * FROM `pre_admin` WHERE 1") == false) {
     header('Content-type:text/html;charset=utf-8');
-    exit(`The system is not installed !<a href="/install/">Click to Install</a>`);
+    echo '<p>The system is not installed ! (error code: 1003)</p><p><a href="/install/">Click to Install</a></p>';
+    exit();
 }
 
 $PageInfo = array('title' => 'UIISC', 'rel' => '');
@@ -98,7 +102,8 @@ $PageInfo = array('title' => 'UIISC', 'rel' => '');
 // include_once APP_ROOT . 'member.php';
 
 if (!file_exists(ROOT . '/data/install.lock') && file_exists(ROOT . '/install/index.php')) {
-    exit('<h2>检测到无 /data/install.lock 文件</h2><ul><li><font size="4">如果您尚未安装本程序，请<a href="/install/">前往安装</a></font></li><li><font size="4">如果您已经安装本程序，请手动放置一个空的 install.lock 文件到 /data 文件夹下，<b>为了您站点安全，在您完成它之前我们不会工作。</b></font></li></ul><br/><h4>为什么必须建立 install.lock 文件？</h4>它是安装保护文件，如果检测不到它，就会认为站点还没安装，此时任何人都可以安装/重装你的网站。<br/><br/>');
+    echo '<h2>检测到无 /data/install.lock 文件</h2><ul><li><font size="4">如果您尚未安装本程序，请<a href="/install/">前往安装</a></font></li><li><font size="4">如果您已经安装本程序，请手动放置一个空的 install.lock 文件到 /data 文件夹下，<b>为了您站点安全，在您完成它之前我们不会工作。</b></font></li></ul><br/><h4>为什么必须建立 install.lock 文件？</h4>它是安装保护文件，如果检测不到它，就会认为站点还没安装，此时任何人都可以安装/重装你的网站。<br/><br/>';
+    exit();
 }
 
 // if ($conf['cdnpublic'] == 1) {
diff --git a/src/install/function/Database.php b/src/install/function/Database.php
index ee14327..c3c088c 100755
--- a/src/install/function/Database.php
+++ b/src/install/function/Database.php
@@ -1,12 +1,13 @@
 <?php
 $sql = mysqli_query($connect, 'CREATE TABLE IF NOT EXISTS `hosting_account` (
-  `account_id` INT(11) NOT NULL AUTO_INCREMENT,
-  `account_client_id` INT(11) NOT NULL,
+  `account_id` INT(11) NOT NULL AUTO_INCREMENT COMMENT "主机账号ID",
+  `account_client_id` INT(11) NOT NULL COMMENT "所属客户ID",
+  `account_key` VARCHAR(8) NOT NULL,
+  `account_api_key` varchar(20) NOT NULL COMMENT "主机提供商标识",
   `account_username` VARCHAR(22) NOT NULL,
   `account_password` VARCHAR(16) NOT NULL,
   `account_domain` VARCHAR(70) NOT NULL,
   `account_sql` VARCHAR(8) NOT NULL,
-  `account_key` VARCHAR(8) NOT NULL,
   `account_status` INT(1) NOT NULL,
   `account_date` VARCHAR(20) NOT NULL,
   PRIMARY KEY (`account_id`)
@@ -14,25 +15,35 @@ $sql = mysqli_query($connect, 'CREATE TABLE IF NOT EXISTS `hosting_account` (
 
 $sql = mysqli_query($connect, 'CREATE TABLE IF NOT EXISTS `hosting_account_api` (
   `api_id` INT(11) unsigned NOT NULL AUTO_INCREMENT,
+  `api_key` varchar(30) NOT NULL,
   `api_username` VARCHAR(256) NOT NULL,
   `api_password` VARCHAR(256) NOT NULL,
   `api_cpanel_url` VARCHAR(100) NOT NULL,
   `api_server_ip` VARCHAR(15) NOT NULL,
   `api_ns_1` VARCHAR(30) NOT NULL,
   `api_ns_2` VARCHAR(30) NOT NULL,
+  `api_ns_3` varchar(30) NOT NULL,
   `api_package` VARCHAR(20) NOT NULL,
+  `api_callback_token` varchar(32) NOT NULL,
   PRIMARY KEY (`api_id`)
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4;');
 
 $sql = mysqli_query($connect, 'CREATE TABLE IF NOT EXISTS `hosting_config` (
   `site_id` INT(11) unsigned NOT NULL AUTO_INCREMENT,
-  `site_key` VARCHAR(10) NOT NULL,
-  `site_status` INT(2) NOT NULL,
-  `site_name` VARCHAR(30) NOT NULL,
-  `site_brand` VARCHAR(30) NOT NULL,
-  `site_company` VARCHAR(30) NOT NULL,
-  `site_path` VARCHAR(70) NOT NULL,
-  `site_email` VARCHAR(50) NOT NULL,
+  `site_key` varchar(20) NOT NULL,
+  `site_status` int(2) NOT NULL,
+  `site_name` varchar(30) NOT NULL,
+  `site_brand` varchar(30) NOT NULL,
+  `site_company` varchar(30) NOT NULL,
+  `site_path` varchar(70) NOT NULL,
+  `site_phone` varchar(30) NOT NULL,
+  `site_email` varchar(50) NOT NULL,
+  `page_title` varchar(80) NOT NULL,
+  `page_description` varchar(200) NOT NULL,
+  `page_keywords` varchar(100) NOT NULL,
+  `page_copyright` varchar(100) NOT NULL,
+  `page_author` varchar(30) NOT NULL,
+  `ifastnet_aff` int(11) DEFAULT NULL,
   PRIMARY KEY (`site_id`)
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4;');
 
@@ -82,8 +93,8 @@ $sql = mysqli_query($connect, 'CREATE TABLE IF NOT EXISTS `hosting_smtp` (
 
 $sql = mysqli_query($connect, 'CREATE TABLE IF NOT EXISTS `hosting_ssl` (
   `ssl_id` INT(11) unsigned NOT NULL AUTO_INCREMENT,
+  `ssl_client_id` INT(11) NOT NULL COMMENT "所属客户ID",
   `ssl_key` INT(12) NOT NULL,
-  `ssl_for` INT(11) NOT NULL,
   PRIMARY KEY (`ssl_id`)
 ) ENGINE=MyISAM AUTO_INCREMENT=1000 DEFAULT CHARSET=utf8mb4;');
 
@@ -97,7 +108,7 @@ $sql = mysqli_query($connect, 'CREATE TABLE IF NOT EXISTS `hosting_ssl_api` (
 
 $sql = mysqli_query($connect, 'CREATE TABLE IF NOT EXISTS `hosting_tickets` (
   `ticket_id` INT(11) unsigned NOT NULL AUTO_INCREMENT,
-  `ticket_for` INT(11) NOT NULL,
+  `ticket_client_id` INT(11) NOT NULL COMMENT "所属客户ID",
   `ticket_subject` VARCHAR(50) NOT NULL,
   `ticket_email` VARCHAR(100) NOT NULL,
   `ticket_department` VARCHAR(10) NOT NULL,
@@ -156,7 +167,7 @@ $sql = mysqli_query($connect, 'CREATE TABLE IF NOT EXISTS `hosting_news`(
 
 $sql = mysqli_query($connect, "CREATE TABLE IF NOT EXISTS `hosting_emails`(
   `email_id` INT(11) NOT NULL AUTO_INCREMENT,
-  `email_for` INT(11) NOT NULL,
+  `email_client_id` INT(11) NOT NULL COMMENT '所属客户ID',
   `email_date` VARCHAR(255) NOT NULL,
   `email_subject` VARCHAR(255) NOT NULL,
   `email_body` VARCHAR(5000) NOT NULL,
diff --git a/src/install/function/configuration.php b/src/install/function/configuration.php
index d9e292c..e9917b6 100755
--- a/src/install/function/configuration.php
+++ b/src/install/function/configuration.php
@@ -11,7 +11,7 @@ $username = $_POST['username'];
 $password = $_POST['password'];
 $dbname = $_POST['dbname'];
 $dbport = !empty($_POST['dbport']) ? $_POST['dbport'] : 3306;
-$prefix = isset($_POST['prefix']) ? $_POST['prefix'] : 'uiisc';
+$prefix = isset($_POST['prefix']) ? $_POST['prefix'] : 'hosting';
 
 @file_put_contents(CONFIG_FILE, "<?php
 \$dbconfig = array(
diff --git a/src/install/views/configuration.php b/src/install/views/configuration.php
index 55730d1..f6dbe93 100755
--- a/src/install/views/configuration.php
+++ b/src/install/views/configuration.php
@@ -34,6 +34,10 @@ require __DIR__ . '/header.php';
                         <label class="form-label">Database Port</label>
                         <input type="text" name="dbport" class="form-control" placeholder="Enter database port here(default:3306)">
                     </div>
+                    <div class="mb-5">
+                        <label class="form-label">Database prefix</label>
+                        <input type="text" name="prefix" class="form-control" placeholder="Enter database prefix here(default:hosting)">
+                    </div>
                     <div class="mt-15">
                         <input type="submit" name="submit" class="btn btn-primary" value="Validate">
                     </div>