diff --git a/.env.example b/.env.example
index 4d833f1..e62f315 100644
--- a/.env.example
+++ b/.env.example
@@ -7,3 +7,6 @@ REDIS_HOST=127.0.0.1
 REDIS_PORT=6379
 REDIS_PASSWD=
 REDIS_PREFIX=tgbot
+
+# ChinaZ API
+ICP_KEY=
diff --git a/cmdRoute.php b/cmdRoute.php
index 6681649..a4438c4 100644
--- a/cmdRoute.php
+++ b/cmdRoute.php
@@ -5,6 +5,7 @@ require_once 'models/ipInfo.php';
 require_once 'models/cfopPic.php';
 require_once 'models/kmsCheck.php';
 require_once 'models/ntpCheck.php';
+require_once 'models/icpQuery.php';
 require_once 'models/punycode.php';
 require_once 'models/whoisQuery.php';
 
@@ -13,6 +14,7 @@ $cmds = array( // 命令列表
     'dc',
     'kms',
     'ntp',
+    'icp',
     'cfop',
     'whois',
     'punycode'
@@ -32,6 +34,9 @@ function route($cmd, $rawParam) { // 命令请求路由
         case 'ntp':
             $entry = new ntpCheckEntry;
             break;
+        case 'icp':
+            $entry = new icpQueryEntry;
+            break;
         case 'cfop':
             $entry = new cfopPicEntry;
             break;
diff --git a/models/icpQuery.php b/models/icpQuery.php
new file mode 100644
index 0000000..4e478a0
--- /dev/null
+++ b/models/icpQuery.php
@@ -0,0 +1,123 @@
+<?php
+
+class icpQuery {
+    private $apiPath = 'https://apidatav2.chinaz.com/single/icp';
+
+    public function __construct() {
+        global $env;
+        $this->apiPath .= '?key=' . $env['ICP_KEY'] . '&domain=';
+    }
+
+    private function getIcpInfo($domain) { // ICP备案查询
+        $info = json_decode(file_get_contents($this->apiPath . $domain), true);
+        if ($info['StateCode'] === 1) { // 存在ICP备案
+            $info = array(
+                'status' => 'ok',
+                'hasIcp' => true
+            ) + $info['Result'];
+        } else if ($info['StateCode'] === 0) { // 无ICP备案
+            $info = array(
+                'status' => 'ok',
+                'hasIcp' => false,
+                'icpMsg' => $info['Reason']
+            );
+        } else {
+            $info = array(
+                'status' => 'error', // 服务错误
+                'message' => 'Server error'
+            );
+        }
+        return $info;
+    }
+
+    public function icpInfo($domain) { // ICP查询入口 带缓存
+        $redis = new redisCache('icp');
+        $info = $redis->getData($domain); // 查询缓存数据
+        if (!$info) { // 缓存未命中
+            $info = $this->getIcpInfo($domain); // 执行查询
+            if ($info['status'] !== 'ok') { // 查询错误
+                return $info;
+            }
+            unset($info['status']);
+            $redis->setData($domain, json_encode($info), 30 * 86400); // 缓存30day
+        } else { // 缓存命中
+            $info = json_decode($info, true); // 使用缓存数据
+        }
+        return array(
+            'status' => 'ok'
+        ) + $info;
+    }
+}
+
+class icpQueryEntry {
+    private function check($str) { // 检查输入参数
+        $content = (new extractDomain)->analyse($str);
+        if (!isset($content['domain'])) { // 格式错误
+            return array(
+                'status' => 'error',
+                'message' => 'Illegal Request'
+            );
+        }
+        if (!isset($content['tld'])) { // 未知TLD
+            return array(
+                'status' => 'error',
+                'message' => 'Unknow TLD'
+            );
+        }
+        return array(
+            'status' => 'ok',
+            'domain' => $content['site'] // 返回主域名
+        );
+    }
+
+    public function query($rawParam) { // ICP备案查询入口
+        if ($rawParam == '' || $rawParam === 'help') { // 显示使用说明
+            tgApi::sendMessage(array(
+                'parse_mode' => 'Markdown',
+                'text' => '*Usage:*  `/icp domain`',
+            ));
+            return;
+        }
+        $content = $this->check($rawParam);
+        if ($content['status'] !== 'ok') { // 请求参数错误
+            tgApi::sendText($content['message']);
+            return;
+        }
+        $domain = $content['domain'];
+        $info = (new icpQuery)->icpInfo($domain); // 发起查询
+        if ($info['status'] !== 'ok') {
+            tgApi::sendText($info['message']); // 查询出错
+            return;
+        }
+        if (!$info['hasIcp']) { // 没有ICP备案
+            tgApi::sendMessage(array(
+                'parse_mode' => 'Markdown',
+                'text' => '`' . $domain . '`' . PHP_EOL . $info['icpMsg']
+            ));
+            return;
+        }
+        $msg = '`' . $domain . '`' . PHP_EOL;
+        $msg .= '*类型：*' . $info['CompanyType'] . PHP_EOL;
+        if ($info['Owner'] != '') { // 负责人不为空
+            $msg .= '*负责人：*' . $info['Owner'] . PHP_EOL;
+        }
+        if ($info['Owner'] != $info['CompanyName']) { // 名称与负责人不重复
+            $msg .= '*名称：*' . $info['CompanyName'] . PHP_EOL;
+        }
+        $msg .= '*主页：*';
+        $pages = explode(';', $info['MainPage']);
+        foreach ($pages as $page) { // 可能存在多个主页 逐个输出
+            $msg .= '`' . $page . '`  ';
+        }
+        $msg .= PHP_EOL;
+        $msg .= '*网站名：*' . $info['SiteName'] . PHP_EOL;
+        $msg .= '*审核时间：*' . $info['VerifyTime'] . PHP_EOL;
+        $msg .= '*许可证号：*' . $info['SiteLicense'] . PHP_EOL;
+        tgApi::sendMessage(array( // 返回查询数据
+            'parse_mode' => 'Markdown',
+            'text' => $msg
+        ));
+    }
+}
+
+?>