diff --git a/backend/country.php b/backend/country.php
new file mode 100644
index 0000000..1b87572
--- /dev/null
+++ b/backend/country.php
@@ -0,0 +1,35 @@
+<?php
+
+// 数据来源：country.db
+// 请求方式：getCountry($code)
+// 返回格式：
+// {
+//     "code": 国家的2位编码
+//     "en": 国家英文名称
+//     "cn": 国家中文名称
+// }
+
+class countryDB extends SQLite3 {
+    function __construct() {
+        $this->open('country.db'); // 国家地区缩写及代号数据库
+    }
+}
+
+function getCountry($code) { // 根据两位国家代码获取英文与中文全称 
+    if ($code == null) {
+        return null;
+    }
+    $db = new countryDB;
+    $raw = $db->query('SELECT * FROM main WHERE alpha_2="'.$code.'";')->fetchArray(SQLITE3_ASSOC);
+    $data['code'] = $code;
+    if ($raw) {
+        $data['en'] = $raw['name_en'];
+        $data['cn'] = $raw['name_cn'];
+    } else {
+        $data['en'] = "Unknow";
+        $data['cn'] = null;
+    }
+    return $data;
+}
+
+?>
\ No newline at end of file
diff --git a/backend/getCountry.php b/backend/getCountry.php
deleted file mode 100644
index 6ba12aa..0000000
--- a/backend/getCountry.php
+++ /dev/null
@@ -1,23 +0,0 @@
-<?php
-
-class countryDB extends SQLite3 {
-    function __construct() {
-        $this->open('country.db'); // 国家地区缩写及代号数据库
-    }
-}
-
-function getCountry($code) { // 根据两位国家代码获取英文与中文全称
-    $db = new countryDB;
-    if ($code == null) {
-        return null;
-    }
-    $dat = $db->query('SELECT * FROM main WHERE alpha_2="'.$code.'";')->fetchArray(SQLITE3_ASSOC);
-    if ($dat) {
-        $name_dat['en'] = $code." - ".$dat['name_en'];
-        $name_dat['cn'] = $dat['name_cn'];
-    } else {
-        $name_dat['en'] = $code." - Unknow";
-        $name_dat['cn'] = null;
-    }
-    return $name_dat;
-}
diff --git a/backend/getInfo.php b/backend/getInfo.php
deleted file mode 100644
index 9b9fbc1..0000000
--- a/backend/getInfo.php
+++ /dev/null
@@ -1,125 +0,0 @@
-<?php
-
-include("getCountry.php");
-include("qqwry.php");
-
-function getIPInfo($ip) {
-    $qqwry = new QQWry();
-    $detail = $qqwry->getDetail($ip);
-    $specialInfo = getSpecialInfo($ip);
-    if (is_string($specialInfo)) {
-        $info['ip'] = $ip;
-        $info['as'] = null;
-        $info['city'] = null;
-        $info['region'] = null;
-        $info['country'] = null;
-        $info['timezone'] = null;
-        $info['loc'] = null;
-        $info['isp'] = $specialInfo;
-    } else {
-        $rawIspInfo = getInfo($ip);
-        $info['ip'] = $ip;
-        $info['as'] = getAS($rawIspInfo);
-        $info['city'] = $rawIspInfo['city'];
-        $info['region'] = $rawIspInfo['region'];
-        $info['country'] = getCountry($rawIspInfo['country'])['en'];
-        $info['country'] .= "（".getCountry($rawIspInfo['country'])['cn']."）";
-        $info['timezone'] = $rawIspInfo['timezone'];
-        $info['loc'] = $rawIspInfo['loc'];
-        $info['isp'] = getIsp($rawIspInfo);
-    }
-    $info['scope'] = tryCIDR($detail['beginIP'], $detail['endIP']);
-    $info['detail'] = $detail['dataA'] . $detail['dataB'];
-
-    if ($_GET['cli'] == "true") { // 使用命令行模式
-        $cli = "IP: ".$info['ip'] . PHP_EOL;
-        $cli .= "AS: ".$info['as'] . PHP_EOL;
-        $cli .= "City: ".$info['city'] . PHP_EOL;
-        $cli .= "Region: ".$info['region'] . PHP_EOL;
-        $cli .= "Country: ".$info['country'] . PHP_EOL;
-        $cli .= "Timezone: ".$info['timezone'] . PHP_EOL;
-        $cli .= "Location: ".$info['loc'] . PHP_EOL;
-        $cli .= "ISP: ".$info['isp'] . PHP_EOL;
-        $cli .= "Scope: ".$info['scope'] . PHP_EOL;
-        $cli .= "Detail: ".$info['detail'] . PHP_EOL;
-        return $cli;
-    }
-
-    header('Content-Type: application/json; charset=utf-8'); // 以JSON格式发送
-    return json_encode($info);
-}
-
-function getSpecialInfo($ip) { // 识别特殊IP地址
-    if ('::1' === $ip) {
-        return 'localhost IPv6 access';
-    }
-    if (stripos($ip, 'fe80:') === 0) {
-        return 'link-local IPv6 access';
-    }
-    if (strpos($ip, '127.') === 0) {
-        return 'localhost IPv4 access';
-    }
-    if (strpos($ip, '10.') === 0) {
-        return 'private IPv4 access';
-    }
-    if (preg_match('/^172\.(1[6-9]|2\d|3[01])\./', $ip) === 1) {
-        return 'private IPv4 access';
-    }
-    if (strpos($ip, '192.168.') === 0) {
-        return 'private IPv4 access';
-    }
-    if (strpos($ip, '169.254.') === 0) {
-        return 'link-local IPv4 access';
-    }
-    return null;
-}
-
-function getInfo($ip) { // 获取IP详细信息
-    $json = file_get_contents('https://ipinfo.io/' . $ip . '/json');
-    if (!is_string($json)) {
-        return null;
-    }
-    $data = json_decode($json, true);
-    if (!is_array($data)) {
-        return null;
-    }
-    return $data;
-}
-
-function getIsp($rawIspInfo) { // 提取ISP信息
-    if (
-        !is_array($rawIspInfo)
-        || !array_key_exists('org', $rawIspInfo)
-        || !is_string($rawIspInfo['org'])
-        || empty($rawIspInfo['org'])
-    ) {
-        return 'Unknown ISP';
-    }
-    return preg_replace('/AS\\d+\\s/', '', $rawIspInfo['org']);
-}
-
-function getAS($rawIspInfo) { // 提取AS信息
-    if (
-        !is_array($rawIspInfo)
-        || !array_key_exists('org', $rawIspInfo)
-        || !is_string($rawIspInfo['org'])
-        || empty($rawIspInfo['org'])
-    ) {
-        return 'Unknown AS';
-    }
-    if (preg_match('/AS\\d+\\s/', $rawIspInfo['org'], $as) !== 1) {
-        return 'Unknown AS';
-    }
-    return trim($as['0']);
-}
-
-function tryCIDR($beginIP, $endIP) {
-    $tmp = ip2long($endIP) - ip2long($beginIP) + 1;
-    if (pow(2, intval(log($tmp, 2))) == $tmp) {
-        return $beginIP . '/' . (32 - log($tmp, 2));
-    } else {
-        return $beginIP . ' - ' . $endIP;
-    }
-}
-
-?>
diff --git a/backend/ipinfo.php b/backend/ipinfo.php
new file mode 100644
index 0000000..5b15807
--- /dev/null
+++ b/backend/ipinfo.php
@@ -0,0 +1,71 @@
+<?php
+
+// 数据来源：https://ipinfo.io/$ip/json
+// 请求方式：getInfo($ip)
+// 返回格式：
+// {
+//     "ip": 请求IP
+//     "as": AS信息
+//     "city": 城市
+//     "region": 行政区
+//     "country": 国家
+//     "timezone": 时区
+//     "loc": 经纬度
+//     "isp": ISP信息
+// }
+
+class IPinfo {
+    public function getInfo($ip) {
+        $rawInfo = self::getRawInfo($ip);
+        $info['ip'] = $ip;
+        $info['as'] = self::getAS($rawInfo);
+        $info['city'] = $rawInfo['city'];
+        $info['region'] = $rawInfo['region'];
+        $info['country'] = $rawInfo['country'];
+        $info['timezone'] = $rawInfo['timezone'];
+        $info['loc'] = $rawInfo['loc'];
+        $info['isp'] = self::getISP($rawInfo);
+        return $info;
+    }
+
+    private function getRawInfo($ip) { // 获取IP信息
+        $json = file_get_contents('https://ipinfo.io/' . $ip . '/json');
+        if (!is_string($json)) {
+            return null;
+        }
+        $data = json_decode($json, true);
+        if (!is_array($data)) {
+            return null;
+        }
+        return $data;
+    }
+
+    private function getISP($rawInfo) { // 提取ISP信息
+        if (
+            !is_array($rawInfo)
+            || !array_key_exists('org', $rawInfo)
+            || !is_string($rawInfo['org'])
+            || empty($rawInfo['org'])
+        ) {
+            return 'Unknown ISP';
+        }
+        return preg_replace('/AS\\d+\\s/', '', $rawInfo['org']);
+    }
+
+    private function getAS($rawInfo) { // 提取AS信息
+        if (
+            !is_array($rawInfo)
+            || !array_key_exists('org', $rawInfo)
+            || !is_string($rawInfo['org'])
+            || empty($rawInfo['org'])
+        ) {
+            return 'Unknown AS';
+        }
+        if (preg_match('/AS\\d+\\s/', $rawInfo['org'], $as) !== 1) {
+            return 'Unknown AS';
+        }
+        return trim($as['0']);
+    }
+}
+
+?>
\ No newline at end of file
diff --git a/backend/qqwry.dat b/backend/qqwry.dat
index de2efb9..05fa23b 100644
Binary files a/backend/qqwry.dat and b/backend/qqwry.dat differ
diff --git a/backend/qqwry.php b/backend/qqwry.php
index a6584cf..db9226c 100644
--- a/backend/qqwry.php
+++ b/backend/qqwry.php
@@ -1,25 +1,36 @@
 <?php
 
+// 数据来源：纯真IP数据库 qqwry.dat
+// 初始化类：new QQWry($fileName)
+// 请求方式：getDetail($ip)
+// 返回格式：
+// {
+//     "beginIP": IP段起始点
+//     "endIP": IP段结束点
+//     "dataA": 国家名
+//     "dataB": 地区名
+// }
+// 
+// 请求版本：getVersion()
+// 返回格式：YYYYMMDD
+
 class QQWry {
     private $fp; // 文件指针
     private $firstRecord; // 第一条记录的偏移地址
     private $lastRecord; // 最后一条记录的偏移地址
     private $recordNum; // 总记录条数
 
-    public function __construct() { // 构造函数
-        $this->fp = 0;
-        if (($this->fp = fopen(__DIR__ . '/qqwry.dat', 'rb')) !== false) {
-            $this->firstRecord = $this->read4byte();
-            $this->lastRecord  = $this->read4byte();
-            $this->recordNum = ($this->lastRecord - $this->firstRecord) / 7; // 每条索引长度为7字节
-        }
+    public function __construct($fileName) { // 构造函数
+        $this->fp = fopen($fileName, 'rb');
+        $this->firstRecord = $this->read4byte();
+        $this->lastRecord  = $this->read4byte();
+        $this->recordNum = ($this->lastRecord - $this->firstRecord) / 7; // 每条索引长度为7字节
     }
 
     public function __destruct() { // 析构函数
         if ($this->fp) {
             fclose($this->fp);
         }
-        $this->fp = 0;
     }
 
     private function read4byte() { // 读取4字节并转为long
@@ -151,3 +162,5 @@ class QQWry {
         }
     }
 }
+
+?>
\ No newline at end of file
diff --git a/backend/queryInfo.php b/backend/queryInfo.php
index feeb80c..48df7f4 100644
--- a/backend/queryInfo.php
+++ b/backend/queryInfo.php
@@ -1,14 +1,100 @@
 <?php
 
 include("getInfo.php");
+include("country.php");
+include("qqwry.php");
+include("ipinfo.php");
 
-$ip = $_GET['ip'];
+function getIPInfo($ip) {
+    $qqwry = new QQWry('qqwry.dat');
+    $detail = $qqwry->getDetail($ip);
+    $specialInfo = checkSpecial($ip);
+    if (is_string($specialInfo)) {
+        $info['ip'] = $ip;
+        $info['as'] = null;
+        $info['city'] = null;
+        $info['region'] = null;
+        $info['country'] = null;
+        $info['timezone'] = null;
+        $info['loc'] = null;
+        $info['isp'] = $specialInfo;
+    } else {
+        $data = IPinfo::getInfo($ip);
+        $country = getCountry($data['country']);
+        $info['ip'] = $data['ip'];
+        $info['as'] = $data['as'];
+        $info['city'] = $data['city'];
+        $info['region'] = $data['region'];
+        $info['country'] = $data['country'] . ' - ' . $country['en'];
+        $info['country'] .= "（" . $country['cn'] . "）";
+        $info['timezone'] = $data['timezone'];
+        $info['loc'] = $data['loc'];
+        $info['isp'] = $data['isp'];
+    }
+    $info['scope'] = tryCIDR($detail['beginIP'], $detail['endIP']);
+    $info['detail'] = $detail['dataA'] . $detail['dataB'];
 
-if (!filter_var($ip, \FILTER_VALIDATE_IP)) {
-    echo "Illegal IP format".PHP_EOL;
-    exit;
+    if ($_GET['cli'] == "true") { // 使用命令行模式
+        $cli = "IP: ".$info['ip'] . PHP_EOL;
+        $cli .= "AS: ".$info['as'] . PHP_EOL;
+        $cli .= "City: ".$info['city'] . PHP_EOL;
+        $cli .= "Region: ".$info['region'] . PHP_EOL;
+        $cli .= "Country: ".$info['country'] . PHP_EOL;
+        $cli .= "Timezone: ".$info['timezone'] . PHP_EOL;
+        $cli .= "Location: ".$info['loc'] . PHP_EOL;
+        $cli .= "ISP: ".$info['isp'] . PHP_EOL;
+        $cli .= "Scope: ".$info['scope'] . PHP_EOL;
+        $cli .= "Detail: ".$info['detail'] . PHP_EOL;
+        return $cli;
+    }
+
+    header('Content-Type: application/json; charset=utf-8'); // 以JSON格式发送
+    return json_encode($info);
+}
+
+function checkSpecial($ip) { // 检查特殊IP地址并返回说明
+    if ('::1' === $ip) {
+        return 'localhost IPv6 access';
+    }
+    if (stripos($ip, 'fe80:') === 0) {
+        return 'link-local IPv6 access';
+    }
+    if (strpos($ip, '127.') === 0) {
+        return 'localhost IPv4 access';
+    }
+    if (strpos($ip, '10.') === 0) {
+        return 'private IPv4 access';
+    }
+    if (preg_match('/^172\.(1[6-9]|2\d|3[01])\./', $ip) === 1) {
+        return 'private IPv4 access';
+    }
+    if (strpos($ip, '192.168.') === 0) {
+        return 'private IPv4 access';
+    }
+    if (strpos($ip, '169.254.') === 0) {
+        return 'link-local IPv4 access';
+    }
+    return null;
+}
+
+function tryCIDR($beginIP, $endIP) { // 给定IP范围，尝试计算CIDR
+    $tmp = ip2long($endIP) - ip2long($beginIP) + 1;
+    if (pow(2, intval(log($tmp, 2))) == $tmp) { // 判断是否为2的整数次方
+        return $beginIP . '/' . (32 - log($tmp, 2));
+    } else {
+        return $beginIP . ' - ' . $endIP;
+    }
+}
+
+function main() {
+    $ip = $_GET['ip'];
+    if (!filter_var($ip, \FILTER_VALIDATE_IP)) {
+        echo "Illegal IP format".PHP_EOL;
+        exit;
+    }
+    echo getIPInfo($ip);
 }
 
-echo getIPInfo($ip);
+main();
 
 ?>