diff --git a/factory/top500_manual.py b/factory/top500_manual.py
index ae4b312..b0a7035 100644
--- a/factory/top500_manual.py
+++ b/factory/top500_manual.py
@@ -3,13 +3,13 @@
 '''
 此脚本用于对 top500_manual.list 中网站进行评估，判断需要直连或代理
 该脚本应当在内网环境中运行
-TODO:并发
 '''
 
 import requests
 import time
+import threading
 
-# 读入 top500 列表
+# Read top500
 domains = [] 
 with open("resultant/top500_manual.list", "r", encoding='utf-8') as f:
     for domain in f.readlines():
@@ -17,35 +17,55 @@ with open("resultant/top500_manual.list", "r", encoding='utf-8') as f:
             continue
         domains.append(domain[:-1])
 
-# 判断直连或代理
 domains_proxy = []
 domains_direct = []
-
-def UrlScaner(domain):
-    requests_header = {
+requests_header = {
     'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36',
     'Cache-Control': 'max-age=0',
     'Accept-Language': 'zh-CN,zh;q=0.8,zh-HK;q=0.6,zh-TW;q=0.4,en;q=0.2',
     'Connection': 'keep-alive'
 }
-    is_proxy = False
-    try:
-        requests.get('http://www.' + domain, timeout=10, headers=requests_header)
-    except BaseException:
-        try:
-            requests.get('http://' + domain, timeout=10, headers=requests_header)
-        except BaseException:
-            is_proxy = True
 
-    if is_proxy:
-        domains_proxy.append(domain)
-    else:
-        domains_direct.append(domain)
+# thread to judge direct/proxy
+class DomainScaner(threading.Thread):
+    def __init__(self):
+        threading.Thread.__init__(self)
 
-    print('Proxy %s：%s' % (is_proxy, domain) )
+    def run(self):
+        while len(domains):
+            domain = domains.pop(0)
+            is_proxy = False
+            try:
+                requests.get('http://www.' + domain, timeout=10, headers=requests_header)
+            except BaseException:
+                try:
+                    requests.get('http://' + domain, timeout=10, headers=requests_header)
+                except BaseException:
+                    is_proxy = True
 
-for domain in domains:
-    UrlScaner(domain)
+            if is_proxy:
+                domains_proxy.append(domain)
+            else:
+                domains_direct.append(domain)
+
+            print('[Doamins Remain: %d]\tProxy %s：%s' % (len(domains), is_proxy, domain) )
+
+
+        global scaner_thread_num
+        scaner_thread_num -= 1
+
+
+print('top500 Script Starting...\n\n')
+
+# Start Thread
+scaner_thread_num = 0
+for i in range(5):
+    DomainScaner().start()
+    scaner_thread_num += 1
+
+# wait thread done
+while scaner_thread_num:
+    pass
 
 
 # write files