diff --git a/include/config.php b/include/config.php
index 44fd488a..33e93827 100644
--- a/include/config.php
+++ b/include/config.php
@@ -62,11 +62,6 @@ if (file_exists('config/allconfig.php')) {
 */
 
 //load settings from database
-if (IS_ANNOUNCE) {
-    dbconn_announce();
-} else {
-    dbconn();
-}
 $settings = get_setting();
 foreach ($settings as $name => $value) {
     $GLOBALS[strtoupper($name)] = $value;
diff --git a/include/globalfunctions.php b/include/globalfunctions.php
index 53448490..22764150 100644
--- a/include/globalfunctions.php
+++ b/include/globalfunctions.php
@@ -152,7 +152,7 @@ function do_log($log, $level = 'info')
     if (!empty($TWEAK['logging'])) {
         $logging = $TWEAK['logging'];
     }
-	if (!empty($TWEAK['logging'])) {
+	if (($fd = fopen($logging, 'a')) !== false) {
 		$backtrace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 2);
 		$content = sprintf(
 			"[%s] [%s] [%s] %s:%s %s%s%s %s%s",
@@ -167,7 +167,8 @@ function do_log($log, $level = 'info')
 			$log,
 			PHP_EOL
 		);
-		file_put_contents($logging, $content, FILE_APPEND);
+		fwrite($fd, $content);
+		fclose($fd);
 	}
 }
 
diff --git a/nexus/Database/DB.php b/nexus/Database/DB.php
index 8e0dcdd3..2ccbd5f6 100644
--- a/nexus/Database/DB.php
+++ b/nexus/Database/DB.php
@@ -29,6 +29,11 @@ class DB
         return $this;
     }
 
+    public function getDriver()
+    {
+        return $this->driver;
+    }
+
     public static function getInstance()
     {
         if (self::$instance) {
@@ -42,25 +47,27 @@ class DB
 
     public function connect($host, $username, $password, $database, $port)
     {
-        $this->driver->connect($host, $username, $password, $database, $port);
+        $result = $this->driver->connect($host, $username, $password, $database, $port);
+        if (!$result) {
+            throw new DatabaseException(sprintf('[%s]: %s', $this->errno(), $this->error()));
+        }
+        $this->driver->query("SET NAMES UTF8");
+        $this->driver->query("SET collation_connection = 'utf8_general_ci'");
+        $this->driver->query("SET sql_mode=''");
         $this->isConnected = true;
-        do_log("do mysql_connect with: " . json_encode(func_get_args()));
+        $log = json_encode(func_get_args());
+        do_log($log);
         return true;
     }
 
     public function autoConnect()
     {
         if ($this->isConnected()) {
-            return;
+            return null;
         }
         $config = config('database.mysql');
-        if (!mysql_connect($config['host'], $config['username'], $config['password'], $config['database'], $config['port'])) {
-            throw new DatabaseException(sprintf("mysql connect error: [%s] %s", mysql_errno(), mysql_error()));
-        }
-        mysql_query("SET NAMES UTF8");
-        mysql_query("SET collation_connection = 'utf8_general_ci'");
-        mysql_query("SET sql_mode=''");
-        $this->isConnected = true;
+        do_log(json_encode($config));
+        return $this->connect($config['host'], $config['username'], $config['password'], $config['database'], $config['port']);
     }
 
     public function query(string $sql)
diff --git a/nexus/Install/Install.php b/nexus/Install/Install.php
index 6f3ea9aa..864a9c15 100644
--- a/nexus/Install/Install.php
+++ b/nexus/Install/Install.php
@@ -10,7 +10,13 @@ class Install
 
     private $minimumPhpVersion = '7.2.0';
 
-    protected $steps = ['环境检测', '添加 .env 文件', '新建数据表', '导入数据', '创建管理员账号'];
+    protected $steps = ['环境检测', '添加 .env 文件', '创建数据表', '导入数据', '创建管理员账号'];
+
+    protected $initializeTables = [
+        'adminpanel', 'agent_allowed_exception', 'agent_allowed_family', 'allowedemails', 'audiocodecs', 'avps', 'bannedemails', 'categories',
+        'caticons', 'codecs', 'countries', 'downloadspeed', 'faq', 'isp', 'language', 'media', 'modpanel', 'processings', 'rules', 'schools',
+        'searchbox', 'secondicons', 'sources', 'standards', 'stylesheets', 'sysoppanel', 'teams', 'torrents_state', 'uploadspeed', 'agent_allowed_family',
+    ];
 
 
     public function __construct()
@@ -421,7 +427,7 @@ class Install
 
     public function saveSettings($settings)
     {
-        foreach ($settings as $prefix => &$group) {
+        foreach ($settings as $prefix => $group) {
             $this->doLog("[SAVE SETTING], prefix: $prefix, nameAndValues: " . json_encode($group));
             saveSetting($prefix, $group);
         }
@@ -443,4 +449,24 @@ class Install
         }
         return true;
     }
+
+    public function importInitialData($sqlFile = '')
+    {
+        if (empty($sqlFile)) {
+            $sqlFile = ROOT_PATH . '_db/dbstructure_v1.6.sql';
+        }
+        $string = file_get_contents($sqlFile);
+        $pattern = "/INSERT INTO `(\w+)` VALUES \(.*\);\n/i";
+        preg_match_all($pattern, $string, $matches, PREG_SET_ORDER);
+        foreach ($matches as $match) {
+            $table = $match[1];
+            $sql = trim($match[0]);
+            if (!in_array($table, $this->initializeTables)) {
+                continue;
+            }
+            $this->doLog("[IMPORT DATA] $table, $sql");
+            sql_query($sql);
+        }
+        return true;
+    }
 }
\ No newline at end of file
diff --git a/public/install/install.php b/public/install/install.php
index 1678f5ea..5f16899b 100644
--- a/public/install/install.php
+++ b/public/install/install.php
@@ -108,6 +108,7 @@ if ($currentStep == 4) {
     $pass = $settingTableRows['pass'];
     while ($isPost) {
         try {
+            $install->importInitialData();
             $install->saveSettings($settings);
             $install->createSymbolicLinks($symbolicLinks);
             $install->nextStep();
@@ -205,6 +206,9 @@ if ($currentStep == 5) {
               </form>
           </div>
       </div>
+      <div class="mt-10 text-center">
+          欢迎使用 NexusPHP 安装程序，如有疑问，点击<a href="http://nexusphp.cn/" target="_blank" class="text-blue-500 p-1">这里</a>获取参考。
+      </div>
   </body>
 <script>
     function goBack() {