diff --git a/packages/mitmproxy/src/lib/dns/https.js b/packages/mitmproxy/src/lib/dns/https.js
index 0abe080..1f14b3c 100644
--- a/packages/mitmproxy/src/lib/dns/https.js
+++ b/packages/mitmproxy/src/lib/dns/https.js
@@ -1,33 +1,41 @@
-const { promisify } = require('util')
-const doh = require('dns-over-http')
-const BaseDNS = require('./base')
-const log = require('../../utils/util.log')
-const dohQueryAsync = promisify(doh.query)
+const { promisify } = require('util');
+const doh = require('dns-over-http');
+const BaseDNS = require('./base');
+const log = require('../../utils/util.log');
+const dohQueryAsync = promisify(doh.query);
 
 module.exports = class DNSOverHTTPS extends BaseDNS {
-  constructor (dnsServer) {
-    super()
-    this.dnsServer = dnsServer
+  constructor(dnsServer) {
+    super();
+    this.dnsServer = dnsServer;
   }
 
-  async _lookup (hostname) {
+  async _lookup(hostname) {
+    // 直接判断域名是否为example.com
+    if (hostname === 'github.com') {
+      log.info('域名github.com使用内置IP集');
+      // 返回预设的IP地址集
+      return ['20.27.177.113', '20.205.243.166', '20.200.245.247'];
+      // 20.27.177.113日本(三网平均延时88MS(三网优秀)) 20.205.243.166新加坡(三网平均延时96MS(电信联通106.5平均延时，移动平均77MS)) 20.200.245.247韩国(三网平均108ms(移动平均120ms))
+    }
+
     try {
-      const result = await dohQueryAsync({ url: this.dnsServer }, [{ type: 'A', name: hostname }])
+      const result = await dohQueryAsync({ url: this.dnsServer }, [{ type: 'A', name: hostname }]);
       if (result.answers.length === 0) {
         // 说明没有获取到ip
-        log.info('该域名没有ip地址解析:', hostname)
-        return []
+        log.info('该域名没有ip地址解析:', hostname);
+        return [];
       }
-      const ret = result.answers.filter(item => { return item.type === 'A' }).map(item => { return item.data })
+      const ret = result.answers.filter(item => item.type === 'A').map(item => item.data);
       if (ret.length === 0) {
-        log.info('该域名没有IPv4地址解析:', hostname)
+        log.info('该域名没有IPv4地址解析:', hostname);
       } else {
-        log.info('获取到域名地址：', hostname, JSON.stringify(ret))
+        log.info('获取到域名地址：', hostname, JSON.stringify(ret));
       }
-      return ret
+      return ret;
     } catch (e) {
-      log.warn('DNS query error:', hostname, ', dns:', this.dnsServer, ', error:', e)
-      return []
+      log.warn('DNS query error:', hostname, ', dns:', this.dnsServer, ', error:', e);
+      return [];
     }
   }
 }