diff --git a/Basis/Compile.py b/Basis/Compile.py
deleted file mode 100644
index ad90c81..0000000
--- a/Basis/Compile.py
+++ /dev/null
@@ -1,11 +0,0 @@
-#!/usr/bin/env python3
-# -*- coding: utf-8 -*-
-
-import compileall
-from Basis.Logger import logging
-
-
-def startCompile(dirRange: str = '/') -> None:
-    for optimize in [-1, 1, 2]:
-        compileall.compile_dir(dirRange, quiet = 1, maxlevels = 256, optimize = optimize)
-        logging.warning('Python optimize compile -> %s (level = %i)' % (dirRange, optimize))
diff --git a/Basis/Constant.py b/Basis/Constant.py
index 15d3f0a..b81e32e 100644
--- a/Basis/Constant.py
+++ b/Basis/Constant.py
@@ -2,7 +2,14 @@
 # -*- coding: utf-8 -*-
 
 Version = 'dev'
+ApiToken = ''
+# ApiToken = 'dnomd343'
+# LogLevel = 'DEBUG'
+LogLevel = 'WARNING'
+LogFile = 'runtime.log'
 WorkDir = '/tmp/ProxyC'
+ObfsSite = 'www.bing.com'
+DnsServer = ['223.5.5.5', '119.29.29.29']
 PathEnv = '/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin'
 
 # Shadowsocks Info
diff --git a/Basis/Logger.py b/Basis/Logger.py
index 0069306..cf8f9b8 100644
--- a/Basis/Logger.py
+++ b/Basis/Logger.py
@@ -4,18 +4,23 @@
 import sys
 import logging
 from colorlog import ColoredFormatter
+from Basis.Constant import LogLevel, LogFile
+
+logLevel = {  # log level
+    'debug': logging.DEBUG,
+    'info': logging.INFO,
+    'warning': logging.WARNING,
+    'error': logging.ERROR,
+    'critical': logging.CRITICAL
+}[LogLevel.lower()]
+dateFormat = '%Y-%m-%d %H:%M:%S'  # log date format
+logFormat = '[%(asctime)s] [%(levelname)s] %(message)s (%(module)s.%(funcName)s)'  # log format
 
-logFile = 'runtime.log'
-# logLevel = logging.INFO
-# logLevel = logging.DEBUG
-logLevel = logging.WARNING
-dateFormat = '%Y-%m-%d %H:%M:%S'
-logFormat = '[%(asctime)s] [%(levelname)s] %(message)s (%(module)s.%(funcName)s)'
 logging.basicConfig(
     level = logLevel,
     format = logFormat,
     datefmt = dateFormat,
-    filename = logFile,
+    filename = LogFile,
 )
 logHandler = logging.StreamHandler(stream = sys.stdout)
 logHandler.setFormatter(ColoredFormatter(
@@ -30,11 +35,3 @@ logHandler.setFormatter(ColoredFormatter(
     }
 ))
 logging.getLogger().addHandler(logHandler)
-
-
-if __name__ == '__main__':
-    logging.debug('debug')
-    logging.info('info')
-    logging.warning('warn')
-    logging.error('error')
-    logging.critical('critical')
diff --git a/Basis/Manager.py b/Basis/Manager.py
index 691631f..3d272be 100644
--- a/Basis/Manager.py
+++ b/Basis/Manager.py
@@ -78,7 +78,7 @@ class Task(object):
             task['status'] = self.__TASK_RUNNING  # set task status as running
             logging.info('Manager pop task [%s] -> %s' % (taskId, task['data']))
             return taskId, copy.deepcopy(task['data'])
-        logging.debug('Manager has no more loaded tasks')
+        logging.debug('Manager has no more task')
         raise RuntimeError('No more tasks')
 
     def finishTask(self, taskId: str, taskData: dict) -> None:  # update task data when completed
diff --git a/Basis/Test.py b/Basis/Test.py
index e23c8ef..83f4523 100644
--- a/Basis/Test.py
+++ b/Basis/Test.py
@@ -6,12 +6,12 @@ import time
 import requests
 from threading import Thread
 from Basis.Logger import logging
-from Basis.Constant import WorkDir
+from Basis.Constant import WorkDir, ObfsSite
 from Basis.Functions import md5Sum, genFlag, hostFormat, checkPortStatus
 
 Settings = {
     'workDir': WorkDir,
-    'site': 'www.bing.com',
+    'site': ObfsSite,
     'serverBind': '',
     'clientBind': '',
     'host': '',
diff --git a/main.py b/main.py
index 6bdada4..36b3622 100755
--- a/main.py
+++ b/main.py
@@ -1,41 +1,44 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
+
 import time
 import _thread
-from Basis import DnsProxy
+import compileall
+from Basis import Constant
 from Basis.Check import Check
+from Basis import Api, DnsProxy
 from Basis.Logger import logging
 from Basis.Manager import Manager
-from Basis.Api import startServer
-from Basis.Constant import Version
-from Basis.Compile import startCompile
 from concurrent.futures import ThreadPoolExecutor
 
-# dnsServers = None
-dnsServers = ['223.5.5.5', '119.28.28.28']
+
+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))
 
 
 def runCheck(taskId: str, taskInfo: dict) -> None:
-    checkResult = Check(taskId, taskInfo)
+    checkResult = Check(taskId, taskInfo)  # check by task info
     logging.warning('[%s] Task finish' % taskId)
-    Manager.finishTask(taskId, checkResult)
+    Manager.finishTask(taskId, checkResult)  # commit check result
 
 
 def loopCheck(threadNum: int = 16) -> None:
-    threadPool = ThreadPoolExecutor(max_workers = threadNum)
+    threadPool = ThreadPoolExecutor(max_workers = threadNum)  # init thread pool
     while True:
         try:
-            taskId, taskInfo = Manager.popTask()
+            taskId, taskInfo = Manager.popTask()  # pop a task
             logging.warning('[%s] Load new task' % taskId)
         except:  # no more task
             time.sleep(2)
             continue
-        threadPool.submit(runCheck, taskId, taskInfo)
+        threadPool.submit(runCheck, taskId, taskInfo)  # submit into thread pool
 
 
-logging.warning('ProxyC starts running (%s)' % Version)
-_thread.start_new_thread(startCompile, ('/usr', ))  # python compile (generate .pyc file)
-_thread.start_new_thread(DnsProxy.start, (dnsServers, 53))  # start dns server
+logging.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(loopCheck, ())  # start loop check
-startServer(apiToken = '')  # start api server
+Api.startServer(apiToken = Constant.ApiToken)  # start api server