diff --git a/Tester/Brook.py b/Tester/Brook.py
index 45a1685..3910f79 100644
--- a/Tester/Brook.py
+++ b/Tester/Brook.py
@@ -4,10 +4,10 @@
 import copy
 import itertools
 from Builder import Brook
-from Basis.Test import Settings
-from Basis.Logger import logging
-from Basis.Process import Process
-from Basis.Functions import hostFormat, genFlag, getAvailablePort
+from Utils.Logger import logger
+from Utils.Test import Settings
+from Utils.Process import Process
+from Utils.Common import hostFormat, genFlag, getAvailablePort
 
 
 def originStream(isUot: bool) -> dict:
@@ -78,7 +78,7 @@ def loadTest(stream: dict) -> dict:
             'port': proxyInfo['port'],
         }
     }
-    logging.debug('New Brook test -> %s' % testInfo)
+    logger.debug('New Brook test -> %s' % testInfo)
     return testInfo
 
 
@@ -91,4 +91,4 @@ def load():
         addStream(wsStream(isRaw, isSecure))  # websocket stream test
     for stream in streams:
         yield loadTest(stream)
-    logging.info('Brook test yield complete')
+    logger.info('Brook test yield complete')
diff --git a/Tester/Hysteria.py b/Tester/Hysteria.py
index 6e36b5f..a1f493e 100644
--- a/Tester/Hysteria.py
+++ b/Tester/Hysteria.py
@@ -5,11 +5,11 @@ import os
 import json
 import itertools
 from Builder import Hysteria
-from Basis.Test import Settings
-from Basis.Logger import logging
-from Basis.Process import Process
-from Basis.Constant import hysteriaProtocols
-from Basis.Functions import hostFormat, genFlag, getAvailablePort
+from Utils.Logger import logger
+from Utils.Test import Settings
+from Utils.Process import Process
+from Utils.Constant import hysteriaProtocols
+from Utils.Common import hostFormat, genFlag, getAvailablePort
 
 
 def loadServer(configFile: str, hysteriaConfig: dict) -> Process:
@@ -78,11 +78,11 @@ def loadTest(protocol: str, isObfs: bool, isAuth: bool) -> dict:
             'port': proxyInfo['port'],
         }
     }
-    logging.debug('New Hysteria test -> %s' % testInfo)
+    logger.debug('New Hysteria test -> %s' % testInfo)
     return testInfo
 
 
 def load():
     for protocol, isObfs, isAuth in itertools.product(hysteriaProtocols, [False, True], [False, True]):
         yield loadTest(protocol, isObfs, isAuth)
-    logging.info('Hysteria test yield complete')
+    logger.info('Hysteria test yield complete')
diff --git a/Tester/Plugin.py b/Tester/Plugin.py
index d873271..7907ac6 100644
--- a/Tester/Plugin.py
+++ b/Tester/Plugin.py
@@ -4,11 +4,11 @@
 import os
 import re
 import json
-from Basis.Test import Settings
-from Basis.Logger import logging
-from Basis.Process import Process
-from Basis.Constant import Plugins
-from Basis.Functions import genFlag, hostFormat, getAvailablePort
+from Utils.Logger import logger
+from Utils.Test import Settings
+from Utils.Process import Process
+from Utils.Constant import Plugins
+from Utils.Common import genFlag, hostFormat, getAvailablePort
 
 pluginParams = {}
 
@@ -220,8 +220,8 @@ def cloakLoad() -> None:
     pluginParams['CK_PUBLIC'] = re.search(r'\s+(\S+)$', ckKey.split('\n')[0])[1]
     pluginParams['CK_PRIVATE'] = re.search(r'\s+(\S+)$', ckKey.split('\n')[1])[1]
     pluginParams['CK_UID'] = re.search(r'\s+(\S+)\n', os.popen('ck-server -uid').read())[1]  # generate uid for clock
-    logging.info('generate cloak uid -> %s' % pluginParams['CK_UID'])
-    logging.info('generate cloak key -> %s (Public) | %s (Private)' % (
+    logger.info('generate cloak uid -> %s' % pluginParams['CK_UID'])
+    logger.info('generate cloak key -> %s (Public) | %s (Private)' % (
         pluginParams['CK_PUBLIC'], pluginParams['CK_PRIVATE']
     ))
     ckPrefix = 'UID=${CK_UID};PublicKey=${CK_PUBLIC};ServerName=${SITE};'  # cloak plugin's basic command
diff --git a/Tester/Shadowsocks.py b/Tester/Shadowsocks.py
index d101c3f..846a513 100644
--- a/Tester/Shadowsocks.py
+++ b/Tester/Shadowsocks.py
@@ -7,11 +7,11 @@ import base64
 import itertools
 from Tester import Plugin
 from Builder import Shadowsocks
-from Basis.Test import Settings
-from Basis.Logger import logging
-from Basis.Process import Process
-from Basis.Functions import md5Sum, genFlag, getAvailablePort
-from Basis.Constant import PathEnv, ssMethods, ssAllMethods, mbedtlsMethods
+from Utils.Logger import logger
+from Utils.Test import Settings
+from Utils.Process import Process
+from Utils.Common import md5Sum, genFlag, getAvailablePort
+from Utils.Constant import PathEnv, ssMethods, ssAllMethods, mbedtlsMethods
 
 
 def loadConfig(proxyInfo: dict) -> dict:  # load basic config option
@@ -134,7 +134,7 @@ def loadTest(serverType: str, clientType: str, method: str, plugin: dict or None
     }
     if plugin is not None:
         testInfo['server'] = plugin['inject'](testInfo['server'], plugin)
-    logging.debug('New Shadowsocks test -> %s' % testInfo)
+    logger.debug('New Shadowsocks test -> %s' % testInfo)
     return testInfo
 
 
@@ -167,4 +167,4 @@ def load(isExtra: bool = False):
             yield next(ssIter)
         except StopIteration:
             break
-    logging.info('Shadowsocks test yield complete')
+    logger.info('Shadowsocks test yield complete')
diff --git a/Tester/ShadowsocksR.py b/Tester/ShadowsocksR.py
index 439d114..38d8851 100644
--- a/Tester/ShadowsocksR.py
+++ b/Tester/ShadowsocksR.py
@@ -3,12 +3,12 @@
 
 import os
 import json
-from Basis.Test import Settings
 from Builder import ShadowsocksR
-from Basis.Logger import logging
-from Basis.Process import Process
-from Basis.Functions import genFlag, getAvailablePort
-from Basis.Constant import ssrMethods, ssrProtocols, ssrObfuscations
+from Utils.Logger import logger
+from Utils.Test import Settings
+from Utils.Process import Process
+from Utils.Common import genFlag, getAvailablePort
+from Utils.Constant import ssrMethods, ssrProtocols, ssrObfuscations
 
 
 def loadServer(configFile: str, proxyInfo: dict) -> Process:  # load server process
@@ -64,7 +64,7 @@ def loadTest(method: str, protocol: str, obfs: str) -> dict:
             'port': proxyInfo['port'],
         }
     }
-    logging.debug('New ShadowsocksR test -> %s' % testInfo)
+    logger.debug('New ShadowsocksR test -> %s' % testInfo)
     return testInfo
 
 
@@ -75,4 +75,4 @@ def load():
         yield loadTest('aes-128-ctr', protocol, 'plain')
     for obfs in ssrObfuscations:
         yield loadTest('aes-128-ctr', 'origin', obfs)
-    logging.info('ShadowsocksR test yield complete')
+    logger.info('ShadowsocksR test yield complete')
diff --git a/Tester/Trojan.py b/Tester/Trojan.py
index abc33a5..a1b4602 100644
--- a/Tester/Trojan.py
+++ b/Tester/Trojan.py
@@ -5,11 +5,11 @@ import os
 import json
 from Tester import Xray
 from Builder import Trojan
-from Basis.Test import Settings
-from Basis.Logger import logging
-from Basis.Process import Process
-from Basis.Constant import xtlsFlows
-from Basis.Functions import md5Sum, genFlag, getAvailablePort
+from Utils.Logger import logger
+from Utils.Test import Settings
+from Utils.Process import Process
+from Utils.Constant import xtlsFlows
+from Utils.Common import md5Sum, genFlag, getAvailablePort
 
 
 def loadServer(configFile: str, proxyInfo: dict, streamConfig: dict, xtlsFlow: str or None) -> Process:
@@ -80,7 +80,7 @@ def loadBasicTest(tcpTlsStream: dict) -> dict:
             'port': proxyInfo['port'],
         }
     }
-    logging.debug('New trojan test -> %s' % testInfo)
+    logger.debug('New trojan test -> %s' % testInfo)
     return testInfo
 
 
@@ -110,7 +110,7 @@ def loadTest(stream: dict) -> dict:
             'port': proxyInfo['port'],
         }
     }
-    logging.debug('New Trojan test -> %s' % testInfo)
+    logger.debug('New Trojan test -> %s' % testInfo)
     return testInfo
 
 
@@ -119,4 +119,4 @@ def load():
     yield loadBasicTest(streams[1])  # Trojan basic test -> TCP stream with TLS
     for stream in streams:  # test all stream cases
         yield loadTest(stream)
-    logging.info('Trojan test yield complete')
+    logger.info('Trojan test yield complete')
diff --git a/Tester/TrojanGo.py b/Tester/TrojanGo.py
index 93d9521..18dbf50 100644
--- a/Tester/TrojanGo.py
+++ b/Tester/TrojanGo.py
@@ -5,11 +5,11 @@ import os
 import json
 from Tester import Plugin
 from Builder import TrojanGo
-from Basis.Test import Settings
-from Basis.Logger import logging
-from Basis.Process import Process
-from Basis.Constant import trojanGoMethods
-from Basis.Functions import md5Sum, genFlag, getAvailablePort
+from Utils.Logger import logger
+from Utils.Test import Settings
+from Utils.Process import Process
+from Utils.Constant import trojanGoMethods
+from Utils.Common import md5Sum, genFlag, getAvailablePort
 
 
 def loadServer(configFile: str, proxyInfo: dict) -> Process:
@@ -85,7 +85,7 @@ def loadTest(wsObject: dict or None, ssObject: dict or None, plugin: dict or Non
     }
     if plugin is not None:
         testInfo['server'] = plugin['inject'](testInfo['server'], plugin)
-    logging.debug('New Trojan-Go test -> %s' % testInfo)
+    logger.debug('New Trojan-Go test -> %s' % testInfo)
     return testInfo
 
 
@@ -103,4 +103,4 @@ def load():
         yield loadTest(wsObject, None if ssObject['method'] == '' else ssObject, None)
     for plugin in Plugin.load('trojan-go'):  # different plugin for trojan-go
         yield loadTest(None, None, plugin)
-    logging.info('Trojan-Go test yield complete')
+    logger.info('Trojan-Go test yield complete')
diff --git a/Tester/V2ray.py b/Tester/V2ray.py
index f278a70..c4a8617 100644
--- a/Tester/V2ray.py
+++ b/Tester/V2ray.py
@@ -3,9 +3,9 @@
 
 import copy
 import itertools
-from Basis.Test import Settings
-from Basis.Functions import genFlag
-from Basis.Constant import quicMethods, udpObfuscations
+from Utils.Test import Settings
+from Utils.Common import genFlag
+from Utils.Constant import quicMethods, udpObfuscations
 
 httpConfig = {
     'version': '1.1',
diff --git a/Tester/VLESS.py b/Tester/VLESS.py
index 78a92e1..f39c431 100644
--- a/Tester/VLESS.py
+++ b/Tester/VLESS.py
@@ -5,11 +5,11 @@ import os
 import json
 from Tester import Xray
 from Builder import VLESS
-from Basis.Test import Settings
-from Basis.Logger import logging
-from Basis.Process import Process
-from Basis.Constant import xtlsFlows
-from Basis.Functions import md5Sum, genUUID, getAvailablePort
+from Utils.Logger import logger
+from Utils.Test import Settings
+from Utils.Process import Process
+from Utils.Constant import xtlsFlows
+from Utils.Common import md5Sum, genUUID, getAvailablePort
 
 
 def loadServer(configFile: str, proxyInfo: dict, streamConfig: dict, xtlsFlow: str or None) -> Process:
@@ -71,7 +71,7 @@ def loadTest(stream: dict) -> dict:
             'port': proxyInfo['port'],
         }
     }
-    logging.debug('New VLESS test -> %s' % testInfo)
+    logger.debug('New VLESS test -> %s' % testInfo)
     return testInfo
 
 
@@ -79,4 +79,4 @@ def load():
     streams = Xray.loadStream()  # load xray-core stream list
     for stream in streams:  # test all stream cases
         yield loadTest(stream)
-    logging.info('VLESS test yield complete')
+    logger.info('VLESS test yield complete')
diff --git a/Tester/VMess.py b/Tester/VMess.py
index bc8dce7..8d9af17 100644
--- a/Tester/VMess.py
+++ b/Tester/VMess.py
@@ -6,11 +6,11 @@ import json
 import itertools
 from Tester import V2ray
 from Builder import VMess
-from Basis.Test import Settings
-from Basis.Logger import logging
-from Basis.Process import Process
-from Basis.Constant import PathEnv, vmessMethods
-from Basis.Functions import md5Sum, genUUID, getAvailablePort
+from Utils.Logger import logger
+from Utils.Test import Settings
+from Utils.Process import Process
+from Utils.Constant import PathEnv, vmessMethods
+from Utils.Common import md5Sum, genUUID, getAvailablePort
 
 
 def loadServer(configFile: str, proxyInfo: dict, streamConfig: dict) -> Process:  # load server process
@@ -69,7 +69,7 @@ def loadTest(method: str, aid: int, stream: dict) -> dict:
             'port': proxyInfo['port'],
         }
     }
-    logging.debug('New VMess test -> %s' % testInfo)
+    logger.debug('New VMess test -> %s' % testInfo)
     return testInfo
 
 
@@ -79,4 +79,4 @@ def load():
         yield loadTest(method, aid, streams[0])
     for stream in streams[1:]:  # skip first stream that has benn checked
         yield loadTest('auto', 0, stream)  # aead with auto security
-    logging.info('VMess test yield complete')
+    logger.info('VMess test yield complete')
diff --git a/Tester/Xray.py b/Tester/Xray.py
index 2e5bb53..abd167b 100644
--- a/Tester/Xray.py
+++ b/Tester/Xray.py
@@ -4,9 +4,9 @@
 import copy
 import itertools
 from Tester import V2ray
-from Basis.Test import Settings
-from Basis.Functions import genFlag
-from Basis.Constant import xtlsFlows, quicMethods, udpObfuscations
+from Utils.Test import Settings
+from Utils.Common import genFlag
+from Utils.Constant import xtlsFlows, quicMethods, udpObfuscations
 
 loadConfig = V2ray.loadConfig
 tcpStream = V2ray.tcpStream
diff --git a/Basis/Test.py b/Utils/Test.py
similarity index 79%
rename from Basis/Test.py
rename to Utils/Test.py
index 2cb96cb..6c7c071 100644
--- a/Basis/Test.py
+++ b/Utils/Test.py
@@ -5,9 +5,9 @@ import os
 import time
 import requests
 from threading import Thread
-from Basis.Logger import logging
-from Basis.Constant import WorkDir, TestHost, TestSite
-from Basis.Functions import md5Sum, genFlag, hostFormat, checkPortStatus
+from Utils.Logger import logger
+from Utils.Constant import WorkDir, TestHost, TestSite
+from Utils.Common import md5Sum, genFlag, hostFormat, isVacantPort
 
 Settings = {
     'workDir': WorkDir,
@@ -27,7 +27,7 @@ def loadBind(serverV6: bool = False, clientV6: bool = False) -> None:
 
 def waitPort(port: int, times: int = 50, delay: int = 100) -> bool:  # wait until port occupied
     for i in range(times):
-        if not checkPortStatus(port):  # port occupied
+        if not isVacantPort(port):  # port occupied
             return True
         time.sleep(delay / 1000)  # default wait 100ms * 50 => 5s
     return False  # timeout
@@ -35,24 +35,24 @@ def waitPort(port: int, times: int = 50, delay: int = 100) -> bool:  # wait unti
 
 def genCert(host: str, certInfo: dict, remark: str = 'ProxyC') -> None:  # generate self-signed certificate
     certOrgInfo = ['--organization', remark, '--organizationUnit', remark]  # organization info
-    logging.critical('Load self-signed certificate')
+    logger.critical('Load self-signed certificate')
     os.system('mkdir -p %s' % Settings['workDir'])  # make sure that work directory exist
 
     # create CA data at first (by mad)
-    logging.critical('Creating CA certificate and key...')
+    logger.critical('Creating CA certificate and key...')
     os.system(' '.join(  # generate CA certificate and privkey
         ['mad', 'ca', '--ca', certInfo['caCert'], '--key', certInfo['caKey'], '--commonName', remark] + certOrgInfo
     ))
 
     # generate private key and sign certificate
-    logging.critical('Signing certificate...')
+    logger.critical('Signing certificate...')
     os.system(' '.join(['mad', 'cert', '--domain', host] + [  # generate certificate and privkey, then signed by CA
         '--ca', certInfo['caCert'], '--ca_key', certInfo['caKey'],
         '--cert', certInfo['cert'], '--key', certInfo['key'],
     ] + certOrgInfo))
 
     # install CA certificate and record self-signed cert info
-    logging.critical('Installing CA certificate...')
+    logger.critical('Installing CA certificate...')
     os.system('cat %s >> /etc/ssl/certs/ca-certificates.crt' % certInfo['caCert'])  # add into system's trust list
 
 
@@ -70,21 +70,21 @@ def loadCert(host: str = TestHost, certId: str = '') -> None:  # load certificat
     Settings['host'] = host
     Settings['cert'] = certInfo['cert']
     Settings['key'] = certInfo['key']
-    logging.warning('Certificate load complete -> ID = %s' % certId)
+    logger.warning('Certificate load complete -> ID = %s' % certId)
 
 
 def httpCheck(socksInfo: dict, url: str, testId: str, timeout: int = 10) -> None:
     socksProxy = 'socks5://%s:%i' % (hostFormat(socksInfo['addr'], v6Bracket = True), socksInfo['port'])
     try:
-        logging.debug('[%s] Http request via %s' % (testId, socksProxy))
+        logger.debug('[%s] Http request via %s' % (testId, socksProxy))
         request = requests.get(url, timeout = timeout, proxies = {  # http request via socks5
             'http': socksProxy,
             'https': socksProxy,
         })
         request.raise_for_status()  # throw error when server return 4xx or 5xx (don't actually need)
-        logging.info('[%s] %s -> ok' % (testId, socksProxy))
+        logger.info('[%s] %s -> ok' % (testId, socksProxy))
     except Exception as exp:
-        logging.error('[%s] %s -> error\n%s' % (testId, socksProxy, exp))  # show detail of error reason
+        logger.error('[%s] %s -> error\n%s' % (testId, socksProxy, exp))  # show detail of error reason
         raise RuntimeError('Http request via socks5 failed')
 
 
@@ -93,8 +93,8 @@ def runTest(testInfo: dict, testUrl: str, testSelect: set or None, delay: int =
     if testSelect is not None:  # testSelect is None -> run all test
         if testId not in testSelect:  # skip unselected task
             return
-    logging.warning('[%s] %s' % (testId, testInfo['caption']))  # show caption
-    logging.debug('[%s] Server ID -> %s | Client ID -> %s' % (
+    logger.warning('[%s] %s' % (testId, testInfo['caption']))  # show caption
+    logger.debug('[%s] Server ID -> %s | Client ID -> %s' % (
         testId, testInfo['server'].id, testInfo['client'].id
     ))
     testInfo['server'].id = testId + '-server'
@@ -103,14 +103,14 @@ def runTest(testInfo: dict, testUrl: str, testSelect: set or None, delay: int =
     # build server and client and wait them start
     testInfo['server'].start()  # start test server
     if waitPort(testInfo['interface']['port']):  # wait for server
-        logging.debug('[%s] Test server start complete' % testId)
+        logger.debug('[%s] Test server start complete' % testId)
     testInfo['client'].start()  # start test client
     if waitPort(testInfo['socks']['port']):  # wait for client
-        logging.debug('[%s] Test client start complete' % testId)
+        logger.debug('[%s] Test client start complete' % testId)
 
     # start test process
     try:
-        logging.debug('[%s] Test process start' % testId)
+        logger.debug('[%s] Test process start' % testId)
         time.sleep(delay)  # delay a short time before check
         httpCheck(testInfo['socks'], testUrl, testId)  # run http request test
         testInfo['client'].quit()  # clean up client
@@ -118,16 +118,16 @@ def runTest(testInfo: dict, testUrl: str, testSelect: set or None, delay: int =
     except:
         testInfo['client'].quit()
         testInfo['server'].quit()
-        logging.warning('[%s] Client info' % testId)
-        logging.error('[%(id)s-server]\n▲ CMD => %(cmd)s\n▲ ENV => %(env)s\n▲ FILE => %(file)s\n%(output)s' % {
+        logger.warning('[%s] Client info' % testId)
+        logger.error('[%(id)s-server]\n▲ CMD => %(cmd)s\n▲ ENV => %(env)s\n▲ FILE => %(file)s\n%(output)s' % {
             'id': testId,
             'cmd': testInfo['client'].cmd,
             'env': testInfo['client'].env,
             'file': testInfo['client'].file,
             'output': '-' * 96 + '\n' + testInfo['client'].output + '-' * 96,
         })
-        logging.warning('[%s] Server info' % testId)
-        logging.error('[%(id)s-client]\n▲ CMD => %(cmd)s\n▲ ENV => %(env)s\n▲ FILE => %(file)s\n%(output)s' % {
+        logger.warning('[%s] Server info' % testId)
+        logger.error('[%(id)s-client]\n▲ CMD => %(cmd)s\n▲ ENV => %(env)s\n▲ FILE => %(file)s\n%(output)s' % {
             'id': testId,
             'cmd': testInfo['server'].cmd,
             'env': testInfo['server'].env,
diff --git a/main.py b/main.py
index 8c16917..3754dd8 100755
--- a/main.py
+++ b/main.py
@@ -7,8 +7,8 @@ import time
 import _thread
 import argparse
 import compileall
-from Basis import Constant
-from Basis.Exception import checkException
+from Utils import Constant
+from Utils.Exception import checkException
 
 
 def mainArgParse(rawArgs: list) -> argparse.Namespace:
@@ -62,18 +62,18 @@ else:
 
 
 from Tester import testEntry
-from Basis.Check import Check
-from Basis import Api, DnsProxy
-from Basis.Logger import logging
-from Basis.Manager import Manager
-from Basis.Test import Test, loadBind, loadCert
+from Utils.Check import Check
+from Utils import Api, DnsProxy
+from Utils.Logger import logger
+from Utils.Manager import Manager
+from Utils.Test import Test, loadBind, loadCert
 from concurrent.futures import ThreadPoolExecutor
 
 
 def pythonCompile(dirRange: str = '/') -> None:  # python optimize compile
     for optimize in [-1, 1, 2]:
         compileall.compile_dir(dirRange, quiet = 1, optimize = optimize)
-        logging.warning('Python optimize compile -> %s (level = %i)' % (dirRange, optimize))
+        logger.warning('Python optimize compile -> %s (level = %i)' % (dirRange, optimize))
 
 
 def runCheck(taskId: str, taskInfo: dict) -> None:
@@ -81,13 +81,13 @@ def runCheck(taskId: str, taskInfo: dict) -> None:
     checkResult = {}
     try:
         checkResult = Check(taskId, taskInfo)  # check by task info
-        logging.warning('[%s] Task finish' % taskId)
+        logger.warning('[%s] Task finish' % taskId)
     except checkException as exp:
         success = False
-        logging.error('[%s] Task error -> %s' % (taskId, exp))
+        logger.error('[%s] Task error -> %s' % (taskId, exp))
     except:
         success = False
-        logging.error('[%s] Task error -> Unknown error' % taskId)
+        logger.error('[%s] Task error -> Unknown error' % taskId)
     finally:
         if not success:  # got some error in check process
             taskInfo.pop('check')
@@ -99,12 +99,12 @@ def runCheck(taskId: str, taskInfo: dict) -> None:
 
 
 def loop(threadNum: int) -> None:
-    logging.warning('Loop check start -> %i threads' % threadNum)
+    logger.warning('Loop check start -> %i threads' % threadNum)
     threadPool = ThreadPoolExecutor(max_workers = threadNum)  # init thread pool
     while True:
         try:
             taskId, taskInfo = Manager.popTask()  # pop a task
-            logging.warning('[%s] Load new task' % taskId)
+            logger.warning('[%s] Load new task' % taskId)
         except:  # no more task
             time.sleep(2)
             continue
@@ -114,26 +114,26 @@ def loop(threadNum: int) -> None:
 if testMode:  # test mode
     loadBind(serverV6 = testArgs.ipv6, clientV6 = testArgs.ipv6)  # ipv4 / ipv6 (127.0.0.1 / ::1)
     loadCert(certId = testArgs.cert)  # cert config
-    logging.critical('TEST ITEM: %s' % testArgs.PROTOCOL)
-    logging.critical('SELECT: ' + str(testArgs.select))
-    logging.critical('URL: %s' % testArgs.url)
-    logging.critical('THREAD NUMBER: %i' % testArgs.thread)
-    logging.critical('-' * 32 + ' TEST START ' + '-' * 32)
+    logger.critical('TEST ITEM: %s' % testArgs.PROTOCOL)
+    logger.critical('SELECT: ' + str(testArgs.select))
+    logger.critical('URL: %s' % testArgs.url)
+    logger.critical('THREAD NUMBER: %i' % testArgs.thread)
+    logger.critical('-' * 32 + ' TEST START ' + '-' * 32)
     if testArgs.PROTOCOL == 'all':  # run all test items
         for item in testEntry:
             if item == ('ss' if testArgs.all else 'ss-all'):  # skip ss / ss-all
                 continue
-            logging.critical('TEST ITEM -> ' + item)
+            logger.critical('TEST ITEM -> ' + item)
             Test(testEntry[item], testArgs.thread, testArgs.url, testArgs.select)
     else:  # run single item
         if testArgs.PROTOCOL == 'ss' and testArgs.all:  # test shadowsocks extra items
             testItem = 'ss-all'
         Test(testEntry[testArgs.PROTOCOL], testArgs.thread, testArgs.url, testArgs.select)
-    logging.critical('-' * 32 + ' TEST COMPLETE ' + '-' * 32)
+    logger.critical('-' * 32 + ' TEST COMPLETE ' + '-' * 32)
     sys.exit(0)  # test complete
 
 
-logging.warning('ProxyC starts running (%s)' % Constant.Version)
+logger.warning('ProxyC starts running (%s)' % Constant.Version)
 _thread.start_new_thread(pythonCompile, ('/usr',))  # python compile (generate .pyc file)
 _thread.start_new_thread(DnsProxy.start, (Constant.DnsServer, 53))  # start dns server
 _thread.start_new_thread(loop, (Constant.CheckThread, ))  # start check loop