diff --git a/none/__init__.py b/none/__init__.py
index d6fc779e..d63f004f 100644
--- a/none/__init__.py
+++ b/none/__init__.py
@@ -143,10 +143,8 @@ def load_builtin_plugins() -> None:
     load_plugins(plugin_dir, 'none.plugins')
 
 
-from .message import message_preprocessor
+from .message import message_preprocessor, Message, MessageSegment
 from .command import on_command, CommandSession, CommandGroup
 from .natural_language import on_natural_language, NLPSession, NLPResult
-from .notice_request import (
-    on_notice, NoticeSession,
-    on_request, RequestSession,
-)
+from .notice_request import (on_notice, NoticeSession,
+                             on_request, RequestSession)
diff --git a/none/expression.py b/none/expression.py
index 037a41eb..97a7f7c2 100644
--- a/none/expression.py
+++ b/none/expression.py
@@ -1,7 +1,7 @@
 import random
 from typing import Union, Sequence, Callable
 
-from aiocqhttp import message
+from .message import escape
 
 Expression_T = Union[str, Sequence[str], Callable]
 
@@ -23,5 +23,5 @@ def render(expr: Expression_T, *, escape_args=True,
     if escape_args:
         for k, v in kwargs.items():
             if isinstance(v, str):
-                kwargs[k] = message.escape(v)
+                kwargs[k] = escape(v)
     return expr.format(**kwargs)
diff --git a/none/natural_language.py b/none/natural_language.py
index b5f768ae..5a54d60b 100644
--- a/none/natural_language.py
+++ b/none/natural_language.py
@@ -3,11 +3,10 @@ import re
 from collections import namedtuple
 from typing import Dict, Any, Iterable, Optional, Callable, Union
 
-from aiocqhttp.message import Message
-
 from . import NoneBot, permission as perm
 from .command import call_command
 from .log import logger
+from .message import Message
 from .session import BaseSession
 
 _nl_processors = set()
diff --git a/none/plugins/base.py b/none/plugins/base.py
index 0347e3e0..7ef4b6ad 100644
--- a/none/plugins/base.py
+++ b/none/plugins/base.py
@@ -1,6 +1,5 @@
-from aiocqhttp.message import unescape
-
 from none import on_command, CommandSession, permission as perm
+from none.message import unescape
 
 
 @on_command('echo')