diff --git a/Furious/Core/CoreManager.py b/Furious/Core/CoreManager.py
index f36fe62..896259a 100644
--- a/Furious/Core/CoreManager.py
+++ b/Furious/Core/CoreManager.py
@@ -155,7 +155,7 @@ class CoreManager(Mixins.CleanupOnExit):
         for attr in ['access', 'error']:
             fixLogObjectPath(config, attr, logRedirectValue, log)
 
-        if routing == 'Bypass Mainland China':
+        if routing == AppBuiltinRouting.BypassMainlandChina.value:
             # TUN Mode handling
             if not proxyModeOnly and SystemRuntime.isTUNMode():
                 showMBoxDirectRulesNotAllowed()
@@ -195,9 +195,9 @@ class CoreManager(Mixins.CleanupOnExit):
                     },
                 ],
             }
-        elif routing == 'Global':
+        elif routing == AppBuiltinRouting.Global.value:
             routingObject = {}
-        elif routing == 'Custom':
+        elif routing == AppBuiltinRouting.Custom.value:
             routingObject = config.get('routing', {})
         else:
             routingObject = {}
@@ -225,7 +225,7 @@ class CoreManager(Mixins.CleanupOnExit):
         log=True,
         **kwargs,
     ):
-        if routing == 'Bypass Mainland China':
+        if routing == AppBuiltinRouting.BypassMainlandChina.value:
             # TUN Mode handling
             if not proxyModeOnly and SystemRuntime.isTUNMode():
                 showMBoxDirectRulesNotAllowed()
@@ -236,12 +236,12 @@ class CoreManager(Mixins.CleanupOnExit):
                 'rule': DATA_DIR / 'hysteria' / 'bypass-mainland-China.acl',
                 'mmdb': DATA_DIR / 'hysteria' / 'country.mmdb',
             }
-        elif routing == 'Global':
+        elif routing == AppBuiltinRouting.Global.value:
             routingObject = {
                 'rule': '',
                 'mmdb': '',
             }
-        elif routing == 'Custom':
+        elif routing == AppBuiltinRouting.Custom.value:
             routingObject = {
                 'rule': config.get('acl', ''),
                 'mmdb': config.get('mmdb', ''),
diff --git a/Furious/Frozenlib/AppCommands.py b/Furious/Frozenlib/Enum.py
similarity index 72%
rename from Furious/Frozenlib/AppCommands.py
rename to Furious/Frozenlib/Enum.py
index 26618e2..590b7aa 100644
--- a/Furious/Frozenlib/AppCommands.py
+++ b/Furious/Frozenlib/Enum.py
@@ -19,9 +19,24 @@ from __future__ import annotations
 
 from enum import Enum
 
-__all__ = ['AppCommands']
+__all__ = [
+    'AppBuiltinCommand',
+    'AppBuiltinRouting',
+    'AppBuiltinProxyMode',
+]
 
 
-class AppCommands(Enum):
+class AppBuiltinCommand(Enum):
     Empty = 'empty'
     RunAs = 'runas'
+
+
+class AppBuiltinRouting(Enum):
+    BypassMainlandChina = 'Bypass Mainland China'
+    Global = 'Global'
+    Custom = 'Custom'
+
+
+class AppBuiltinProxyMode(Enum):
+    Auto = 'Auto'
+    NoChanges = 'NoChanges'
diff --git a/Furious/Frozenlib/Utility.py b/Furious/Frozenlib/Utility.py
index bc4bbfb..3d15be3 100644
--- a/Furious/Frozenlib/Utility.py
+++ b/Furious/Frozenlib/Utility.py
@@ -19,10 +19,10 @@ from __future__ import annotations
 
 from Furious.Frozenlib.Constants import *
 
+from enum import Enum
 from typing import AnyStr, Tuple
 
 import os
-import enum
 import time
 import pathlib
 import operator
@@ -43,7 +43,7 @@ __all__ = [
 ]
 
 
-class Protocol(enum.Enum):
+class Protocol(Enum):
     Unknown = 'Unknown'
     VMess = 'VMess'
     VLESS = 'VLESS'
diff --git a/Furious/Frozenlib/__init__.py b/Furious/Frozenlib/__init__.py
index b0b85bf..e9f2dfc 100644
--- a/Furious/Frozenlib/__init__.py
+++ b/Furious/Frozenlib/__init__.py
@@ -15,9 +15,9 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
-from .AppCommands import *
 from .AppSettings import *
 from .Constants import *
+from .Enum import *
 from .Globals import *
 from .Mixins import *
 from .PySide6Legacy import *
diff --git a/Furious/TrayActions/EditConfiguration.py b/Furious/TrayActions/EditConfiguration.py
index 28d8119..63283ac 100644
--- a/Furious/TrayActions/EditConfiguration.py
+++ b/Furious/TrayActions/EditConfiguration.py
@@ -15,6 +15,8 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
+from __future__ import annotations
+
 from Furious.Frozenlib import *
 from Furious.Qt import *
 from Furious.Qt import gettext as _
diff --git a/Furious/TrayActions/Exit.py b/Furious/TrayActions/Exit.py
index a51e85b..7542f6f 100644
--- a/Furious/TrayActions/Exit.py
+++ b/Furious/TrayActions/Exit.py
@@ -15,6 +15,8 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
+from __future__ import annotations
+
 from Furious.Frozenlib import *
 from Furious.Qt import *
 from Furious.Qt import gettext as _
diff --git a/Furious/TrayActions/Import.py b/Furious/TrayActions/Import.py
index 2512886..b2fcb42 100644
--- a/Furious/TrayActions/Import.py
+++ b/Furious/TrayActions/Import.py
@@ -15,6 +15,8 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
+from __future__ import annotations
+
 from Furious.Frozenlib import *
 from Furious.Library import *
 from Furious.Qt import *
diff --git a/Furious/TrayActions/Language.py b/Furious/TrayActions/Language.py
index 8b2029b..960a97b 100644
--- a/Furious/TrayActions/Language.py
+++ b/Furious/TrayActions/Language.py
@@ -15,6 +15,8 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
+from __future__ import annotations
+
 from Furious.Frozenlib import *
 from Furious.Qt import *
 from Furious.Qt import gettext as _
diff --git a/Furious/TrayActions/Routing.py b/Furious/TrayActions/Routing.py
index f06a0e3..9dd11d8 100644
--- a/Furious/TrayActions/Routing.py
+++ b/Furious/TrayActions/Routing.py
@@ -15,15 +15,17 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
+from __future__ import annotations
+
 from Furious.Frozenlib import *
 from Furious.Qt import *
 from Furious.Qt import gettext as _
 
 __all__ = ['RoutingAction']
 
-BUILTIN_ROUTING = ['Bypass Mainland China', 'Global', 'Custom']
-
-registerAppSettings('Routing', validRange=BUILTIN_ROUTING)
+registerAppSettings(
+    'Routing', validRange=list(routing.value for routing in AppBuiltinRouting)
+)
 
 # ALL BUILTIN ROUTING VALUE
 _TRANSLATABLE_BUILTIN_ROUTING = [
@@ -51,7 +53,7 @@ class RoutingAction(AppQAction):
     def __init__(self, **kwargs):
         if AppSettings.get('Routing') == 'Bypass':
             # Update value for backward compatibility
-            AppSettings.set('Routing', 'Bypass Mainland China')
+            AppSettings.set('Routing', AppBuiltinRouting.BypassMainlandChina.value)
 
         super().__init__(
             _('Routing'),
@@ -59,11 +61,11 @@ class RoutingAction(AppQAction):
             menu=AppQMenu(
                 *list(
                     RoutingChildAction(
-                        _(routing),
+                        _(routing.value),
                         checkable=True,
-                        checked=AppSettings.get('Routing') == routing,
+                        checked=AppSettings.get('Routing') == routing.value,
                     )
-                    for routing in BUILTIN_ROUTING
+                    for routing in AppBuiltinRouting
                 ),
             ),
             **kwargs,
diff --git a/Furious/TrayActions/Settings.py b/Furious/TrayActions/Settings.py
index 3ee74cd..690c77b 100644
--- a/Furious/TrayActions/Settings.py
+++ b/Furious/TrayActions/Settings.py
@@ -15,6 +15,8 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
+from __future__ import annotations
+
 from Furious.Frozenlib import *
 from Furious.Qt import *
 from Furious.Qt import gettext as _
diff --git a/Furious/TrayActions/SystemProxy.py b/Furious/TrayActions/SystemProxy.py
index 6321899..94b02ae 100644
--- a/Furious/TrayActions/SystemProxy.py
+++ b/Furious/TrayActions/SystemProxy.py
@@ -15,15 +15,17 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
+from __future__ import annotations
+
 from Furious.Frozenlib import *
 from Furious.Qt import *
 from Furious.Qt import gettext as _
 
 __all__ = ['SystemProxyAction']
 
-BUILTIN_PROXY_MODE = ['Auto', 'NoChanges']
-
-registerAppSettings('SystemProxyMode', validRange=BUILTIN_PROXY_MODE)
+registerAppSettings(
+    'SystemProxyMode', validRange=list(mode.value for mode in AppBuiltinProxyMode)
+)
 
 
 class SystemProxyChildAction(AppQAction):
@@ -32,9 +34,9 @@ class SystemProxyChildAction(AppQAction):
 
     def triggeredCallback(self, checked):
         if self.textCompare('Automatically Configure System Proxy'):
-            AppSettings.set('SystemProxyMode', 'Auto')
+            AppSettings.set('SystemProxyMode', AppBuiltinProxyMode.Auto.value)
         elif self.textCompare('Do Not Change System Proxy'):
-            AppSettings.set('SystemProxyMode', 'NoChanges')
+            AppSettings.set('SystemProxyMode', AppBuiltinProxyMode.NoChanges.value)
 
 
 class SystemProxyAction(AppQAction):
@@ -46,12 +48,14 @@ class SystemProxyAction(AppQAction):
                 SystemProxyChildAction(
                     _('Automatically Configure System Proxy'),
                     checkable=True,
-                    checked=AppSettings.get('SystemProxyMode') == 'Auto',
+                    checked=AppSettings.get('SystemProxyMode')
+                    == AppBuiltinProxyMode.Auto.value,
                 ),
                 SystemProxyChildAction(
                     _('Do Not Change System Proxy'),
                     checkable=True,
-                    checked=AppSettings.get('SystemProxyMode') == 'NoChanges',
+                    checked=AppSettings.get('SystemProxyMode')
+                    == AppBuiltinProxyMode.NoChanges.value,
                 ),
             ),
             **kwargs,
diff --git a/Furious/Utility/SystemProxy.py b/Furious/Utility/SystemProxy.py
index d2b7792..332a177 100644
--- a/Furious/Utility/SystemProxy.py
+++ b/Furious/Utility/SystemProxy.py
@@ -29,7 +29,7 @@ logger = logging.getLogger(__name__)
 
 def handleAppSystemProxyMode() -> bool:
     try:
-        if AppSettings.get('SystemProxyMode') == 'Auto':
+        if AppSettings.get('SystemProxyMode') == AppBuiltinProxyMode.Auto.value:
             # Automatically configure
             return True
         else:
diff --git a/Furious/Widget/Application.py b/Furious/Widget/Application.py
index 60418b2..98276d7 100644
--- a/Furious/Widget/Application.py
+++ b/Furious/Widget/Application.py
@@ -89,17 +89,17 @@ class SingletonApplication(ApplicationExitHelper):
 
         if self.socket.waitForConnected(1000):
             if len(sys.argv) == 1:
-                command = AppCommands.Empty.value
+                command = AppBuiltinCommand.Empty.value
             else:
                 command = sys.argv[1]
 
             self.socket.write(command.encode())
             self.socket.flush()
 
-            if command == AppCommands.Empty.value:
+            if command == AppBuiltinCommand.Empty.value:
                 # Show tray message in the started instance. Do not start
                 return True
-            elif command == AppCommands.RunAs.value:
+            elif command == AppBuiltinCommand.RunAs.value:
                 if self.socket.waitForDisconnected(3000):
                     # The other instance have been exited. Start
                     return False
@@ -198,7 +198,7 @@ class Application(ApplicationFactory, SingletonApplication):
         else:
             datastr = str(data)
 
-        if datastr == AppCommands.Empty.value:
+        if datastr == AppBuiltinCommand.Empty.value:
             if isinstance(self.systemTray, SystemTrayIcon):
                 logger.info('attempting to start multiple instance. Show tray message')
 
@@ -206,7 +206,7 @@ class Application(ApplicationFactory, SingletonApplication):
             else:
                 # The tray hasn't been initialized. Do nothing
                 pass
-        elif datastr == AppCommands.RunAs.value:
+        elif datastr == AppBuiltinCommand.RunAs.value:
             logger.info('detected requests to start as admin in new instance. Exiting')
 
             self.exit()
@@ -301,7 +301,7 @@ class Application(ApplicationFactory, SingletonApplication):
     def cleanup():
         Mixins.CleanupOnExit.cleanupAll()
 
-        if AppSettings.get('SystemProxyMode') == 'Auto':
+        if AppSettings.get('SystemProxyMode') == AppBuiltinProxyMode.Auto.value:
             # Automatically configure
             SystemProxy.off()
             SystemProxy.daemonOff()
@@ -452,7 +452,7 @@ class Application(ApplicationFactory, SingletonApplication):
             Win32Session.set(Application.cleanup)
             Win32Session.run()
 
-            if AppSettings.get('SystemProxyMode') == 'Auto':
+            if AppSettings.get('SystemProxyMode') == AppBuiltinProxyMode.Auto.value:
                 # Automatically configure
                 SystemProxy.off()
                 SystemProxy.daemonOn_()
diff --git a/Furious/Widget/UserServersQTableWidget.py b/Furious/Widget/UserServersQTableWidget.py
index 741d4d0..9bd2306 100644
--- a/Furious/Widget/UserServersQTableWidget.py
+++ b/Furious/Widget/UserServersQTableWidget.py
@@ -527,7 +527,7 @@ class TestDownloadSpeedWorker(WebGETManager):
 
         self.coreManager.start(
             configcopy,
-            'Global',
+            AppBuiltinRouting.Global.value,
             self.coreExitCallback,
             msgCallbackCore=self.coreMsgCallback,
             deepcopy=False,
@@ -555,7 +555,7 @@ class TestDownloadSpeedWorker(WebGETManager):
 
         self.coreManager.start(
             configcopy,
-            'Global',
+            AppBuiltinRouting.Global.value,
             self.coreExitCallback,
             msgCallbackCore=self.coreMsgCallback,
             deepcopy=False,
diff --git a/Furious/Window/AppMainWindow.py b/Furious/Window/AppMainWindow.py
index 2882848..4b4c086 100644
--- a/Furious/Window/AppMainWindow.py
+++ b/Furious/Window/AppMainWindow.py
@@ -502,7 +502,7 @@ class AppMainWindow(AppQMainWindow):
                         arguments=[
                             '-Command',
                             f'Start-Process \'{APP().applicationFilePath()}\' '
-                            f'\'{AppCommands.RunAs.value}\' -Verb runAs',
+                            f'\'{AppBuiltinCommand.RunAs.value}\' -Verb runAs',
                         ],
                     )
                 elif PLATFORM == 'Darwin':
@@ -511,7 +511,7 @@ class AppMainWindow(AppQMainWindow):
                         arguments=[
                             '-e',
                             f'do shell script \"{APP().applicationFilePath()} '
-                            f'{AppCommands.RunAs.value}\" with administrator privileges',
+                            f'{AppBuiltinCommand.RunAs.value}\" with administrator privileges',
                         ],
                     )
             else: