diff --git a/docs/guide/basic-configuration.md b/docs/guide/basic-configuration.md
index e4c4449f..73e88382 100644
--- a/docs/guide/basic-configuration.md
+++ b/docs/guide/basic-configuration.md
@@ -46,6 +46,10 @@ CUSTOM_CONFIG2=  # 留空则从系统环境变量读取，如不存在则为空
 
 详细的配置项参考 [Config Reference](../api/config.md) 。
 
+## 系统环境变量
+
+如果在系统环境变量中定义了配置，则一样会被读取。
+
 ## bot.py 文件
 
 配置项也可以在 NoneBot 初始化时传入。此处可以传入任意合法 Python 变量。当然也可以在初始化完成后修改或新增。
@@ -65,4 +69,4 @@ config.custom_config4 = "new config after init"
 
 ## 优先级
 
-`bot.py init` > `env file` > `system env`
+`bot.py init` > `system env` > `env file`
diff --git a/nonebot/__init__.py b/nonebot/__init__.py
index 5aafc1ef..8c26145e 100644
--- a/nonebot/__init__.py
+++ b/nonebot/__init__.py
@@ -26,7 +26,13 @@
 
 import importlib
 import pkg_resources
-from nonebot.typing import Bot, Dict, Type, Union, Driver, Optional
+from typing import Dict, Type, Optional
+
+from nonebot.utils import escape_tag
+from nonebot.config import Env, Config
+from nonebot.adapters import BaseBot as Bot
+from nonebot.log import logger, default_filter
+from nonebot.drivers import BaseDriver as Driver
 
 _dist: pkg_resources.Distribution = pkg_resources.get_distribution("nonebot2")
 __version__ = _dist.version
@@ -136,11 +142,6 @@ def get_bots() -> Dict[str, Bot]:
     return driver.bots
 
 
-from nonebot.utils import escape_tag
-from nonebot.config import Env, Config
-from nonebot.log import logger, default_filter
-
-
 def init(*, _env_file: Optional[str] = None, **kwargs):
     """
     :说明:
diff --git a/nonebot/adapters/__init__.py b/nonebot/adapters/__init__.py
index 5f5d849a..00fad277 100644
--- a/nonebot/adapters/__init__.py
+++ b/nonebot/adapters/__init__.py
@@ -8,12 +8,14 @@
 import abc
 from functools import reduce, partial
 from dataclasses import dataclass, field
+from typing import Any, Dict, Union, TypeVar, Optional, Callable, Iterable, Awaitable, Generic, TYPE_CHECKING
 
 from pydantic import BaseModel
 
 from nonebot.config import Config
-from nonebot.typing import Driver, Message, WebSocket
-from nonebot.typing import Any, Dict, Union, Optional, Callable, Iterable, Awaitable, TypeVar, Generic
+
+if TYPE_CHECKING:
+    from nonebot.drivers import BaseDriver as Driver, BaseWebSocket as WebSocket
 
 
 class BaseBot(abc.ABC):
@@ -23,12 +25,12 @@ class BaseBot(abc.ABC):
 
     @abc.abstractmethod
     def __init__(self,
-                 driver: Driver,
+                 driver: "Driver",
                  connection_type: str,
                  config: Config,
                  self_id: str,
                  *,
-                 websocket: Optional[WebSocket] = None):
+                 websocket: Optional["WebSocket"] = None):
         """
         :参数:
 
@@ -60,7 +62,7 @@ class BaseBot(abc.ABC):
 
     @classmethod
     @abc.abstractmethod
-    async def check_permission(cls, driver: Driver, connection_type: str,
+    async def check_permission(cls, driver: "Driver", connection_type: str,
                                headers: dict, body: Optional[dict]) -> str:
         """
         :说明:
@@ -252,7 +254,7 @@ class BaseEvent(abc.ABC, Generic[T]):
 
     @property
     @abc.abstractmethod
-    def message(self) -> Optional[Message]:
+    def message(self) -> Optional["BaseMessage"]:
         """消息内容"""
         raise NotImplementedError
 
@@ -373,7 +375,9 @@ class BaseMessage(list, abc.ABC):
 
     @staticmethod
     @abc.abstractmethod
-    def _construct(msg: Union[str, dict, list]) -> Iterable[BaseMessageSegment]:
+    def _construct(
+            msg: Union[str, dict, list,
+                       BaseModel]) -> Iterable[BaseMessageSegment]:
         raise NotImplementedError
 
     def __add__(
diff --git a/nonebot/adapters/cqhttp/bot.py b/nonebot/adapters/cqhttp/bot.py
index 7b61c1e1..5ab62586 100644
--- a/nonebot/adapters/cqhttp/bot.py
+++ b/nonebot/adapters/cqhttp/bot.py
@@ -3,22 +3,25 @@ import sys
 import hmac
 import json
 import asyncio
+from typing import Any, Dict, Union, Optional, TYPE_CHECKING
 
 import httpx
 
 from nonebot.log import logger
 from nonebot.config import Config
+from nonebot.typing import overrides
 from nonebot.adapters import BaseBot
 from nonebot.message import handle_event
 from nonebot.exception import RequestDenied
-from nonebot.typing import Any, Dict, Union, Optional
-from nonebot.typing import overrides, Driver, WebSocket
 
 from .event import Event
 from .message import Message, MessageSegment
 from .exception import NetworkError, ApiNotAvailable, ActionFailed
 from .utils import log
 
+if TYPE_CHECKING:
+    from nonebot.drivers import BaseDriver as Driver, BaseWebSocket as WebSocket
+
 
 def get_auth_bearer(access_token: Optional[str] = None) -> Optional[str]:
     if not access_token:
@@ -212,12 +215,12 @@ class Bot(BaseBot):
     """
 
     def __init__(self,
-                 driver: Driver,
+                 driver: "Driver",
                  connection_type: str,
                  config: Config,
                  self_id: str,
                  *,
-                 websocket: Optional[WebSocket] = None):
+                 websocket: Optional["WebSocket"] = None):
 
         super().__init__(driver,
                          connection_type,
@@ -235,7 +238,7 @@ class Bot(BaseBot):
 
     @classmethod
     @overrides(BaseBot)
-    async def check_permission(cls, driver: Driver, connection_type: str,
+    async def check_permission(cls, driver: "Driver", connection_type: str,
                                headers: dict, body: Optional[dict]) -> str:
         """
         :说明:
diff --git a/nonebot/adapters/cqhttp/bot.pyi b/nonebot/adapters/cqhttp/bot.pyi
index cf487c20..07463175 100644
--- a/nonebot/adapters/cqhttp/bot.pyi
+++ b/nonebot/adapters/cqhttp/bot.pyi
@@ -1,8 +1,9 @@
 import asyncio
+from typing import Any, Dict, List, Union, Optional
 
 from nonebot.config import Config
 from nonebot.adapters import BaseBot
-from nonebot.typing import Any, Dict, List, Union, Driver, Optional, WebSocket
+from nonebot.drivers import BaseDriver as Driver, BaseWebSocket as WebSocket
 
 from .event import Event
 from .message import Message, MessageSegment
diff --git a/nonebot/adapters/cqhttp/event.py b/nonebot/adapters/cqhttp/event.py
index 5bc959c9..e813d24b 100644
--- a/nonebot/adapters/cqhttp/event.py
+++ b/nonebot/adapters/cqhttp/event.py
@@ -1,5 +1,7 @@
+from typing import Optional
+
+from nonebot.typing import overrides
 from nonebot.adapters import BaseEvent
-from nonebot.typing import Optional, overrides
 
 from .message import Message
 
diff --git a/nonebot/adapters/cqhttp/exception.py b/nonebot/adapters/cqhttp/exception.py
index 2bcc73f4..d91bcc64 100644
--- a/nonebot/adapters/cqhttp/exception.py
+++ b/nonebot/adapters/cqhttp/exception.py
@@ -1,4 +1,5 @@
-from nonebot.typing import Optional
+from typing import Optional
+
 from nonebot.exception import (AdapterException, ActionFailed as
                                BaseActionFailed, NetworkError as
                                BaseNetworkError, ApiNotAvailable as
diff --git a/nonebot/adapters/cqhttp/message.py b/nonebot/adapters/cqhttp/message.py
index 47d21bc8..acc6c6cf 100644
--- a/nonebot/adapters/cqhttp/message.py
+++ b/nonebot/adapters/cqhttp/message.py
@@ -1,6 +1,7 @@
 import re
+from typing import Any, Dict, Union, Tuple, Iterable, Optional
 
-from nonebot.typing import Any, Dict, Union, Tuple, Iterable, Optional, overrides
+from nonebot.typing import overrides
 from nonebot.adapters import BaseMessage, BaseMessageSegment
 
 from .utils import log, escape, unescape, _b2s
diff --git a/nonebot/adapters/cqhttp/utils.py b/nonebot/adapters/cqhttp/utils.py
index ecfee872..747b964f 100644
--- a/nonebot/adapters/cqhttp/utils.py
+++ b/nonebot/adapters/cqhttp/utils.py
@@ -1,4 +1,5 @@
-from nonebot.typing import Optional
+from typing import Optional
+
 from nonebot.utils import logger_wrapper
 
 log = logger_wrapper("CQHTTP")
diff --git a/nonebot/adapters/ding/bot.py b/nonebot/adapters/ding/bot.py
index 840685c2..c8c9ad20 100644
--- a/nonebot/adapters/ding/bot.py
+++ b/nonebot/adapters/ding/bot.py
@@ -1,6 +1,7 @@
 import hmac
 import base64
 from datetime import datetime
+from typing import Any, Union, Optional, TYPE_CHECKING
 
 import httpx
 from nonebot.log import logger
@@ -8,7 +9,6 @@ from nonebot.config import Config
 from nonebot.adapters import BaseBot
 from nonebot.message import handle_event
 from nonebot.exception import RequestDenied
-from nonebot.typing import Any, Union, Driver, Optional
 
 from .utils import log
 from .event import Event
@@ -16,13 +16,16 @@ from .model import MessageModel
 from .message import Message, MessageSegment
 from .exception import NetworkError, ApiNotAvailable, ActionFailed, SessionExpired
 
+if TYPE_CHECKING:
+    from nonebot.drivers import BaseDriver as Driver
+
 
 class Bot(BaseBot):
     """
     钉钉 协议 Bot 适配。继承属性参考 `BaseBot <./#class-basebot>`_ 。
     """
 
-    def __init__(self, driver: Driver, connection_type: str, config: Config,
+    def __init__(self, driver: "Driver", connection_type: str, config: Config,
                  self_id: str, **kwargs):
 
         super().__init__(driver, connection_type, config, self_id, **kwargs)
@@ -35,7 +38,7 @@ class Bot(BaseBot):
         return "ding"
 
     @classmethod
-    async def check_permission(cls, driver: Driver, connection_type: str,
+    async def check_permission(cls, driver: "Driver", connection_type: str,
                                headers: dict, body: Optional[dict]) -> str:
         """
         :说明:
diff --git a/nonebot/adapters/ding/event.py b/nonebot/adapters/ding/event.py
index 876ad493..ccd1ab47 100644
--- a/nonebot/adapters/ding/event.py
+++ b/nonebot/adapters/ding/event.py
@@ -1,5 +1,6 @@
+from typing import Union, Optional
+
 from nonebot.adapters import BaseEvent
-from nonebot.typing import Union, Optional
 
 from .message import Message
 from .model import MessageModel, ConversationType, TextMessage
diff --git a/nonebot/adapters/ding/exception.py b/nonebot/adapters/ding/exception.py
index b1d74d14..37276eaa 100644
--- a/nonebot/adapters/ding/exception.py
+++ b/nonebot/adapters/ding/exception.py
@@ -1,4 +1,5 @@
-from nonebot.typing import Optional
+from typing import Optional
+
 from nonebot.exception import (AdapterException, ActionFailed as
                                BaseActionFailed, ApiNotAvailable as
                                BaseApiNotAvailable, NetworkError as
diff --git a/nonebot/adapters/ding/message.py b/nonebot/adapters/ding/message.py
index d8e88314..c8b39488 100644
--- a/nonebot/adapters/ding/message.py
+++ b/nonebot/adapters/ding/message.py
@@ -1,5 +1,7 @@
-from nonebot.typing import Any, Dict, Union, Iterable
+from typing import Any, Dict, Union, Iterable
+
 from nonebot.adapters import BaseMessage, BaseMessageSegment
+
 from .utils import log
 from .model import TextMessage
 
diff --git a/nonebot/adapters/ding/model.py b/nonebot/adapters/ding/model.py
index d317ea5b..8f0cbe1c 100644
--- a/nonebot/adapters/ding/model.py
+++ b/nonebot/adapters/ding/model.py
@@ -1,5 +1,6 @@
-from typing import List, Optional
 from enum import Enum
+from typing import List, Optional
+
 from pydantic import BaseModel
 
 
diff --git a/nonebot/config.py b/nonebot/config.py
index 756ef945..e1ac2b71 100644
--- a/nonebot/config.py
+++ b/nonebot/config.py
@@ -18,12 +18,11 @@ import os
 from pathlib import Path
 from datetime import timedelta
 from ipaddress import IPv4Address
+from typing import Any, Set, Dict, Union, Mapping, Optional
 
 from pydantic import BaseSettings, IPvAnyAddress
 from pydantic.env_settings import SettingsError, env_file_sentinel, read_env_file
 
-from nonebot.typing import Any, Set, Dict, Union, Mapping, Optional
-
 
 class BaseConfig(BaseSettings):
 
@@ -56,7 +55,7 @@ class BaseConfig(BaseSettings):
 
         for field in self.__fields__.values():
             env_val: Optional[str] = None
-            for env_name in field.field_info.extra['env_names']:
+            for env_name in field.field_info.extra["env_names"]:
                 env_val = env_vars.get(env_name)
                 if env_name in env_file_vars:
                     del env_file_vars[env_name]
diff --git a/nonebot/drivers/__init__.py b/nonebot/drivers/__init__.py
index 8227690f..af4f960e 100644
--- a/nonebot/drivers/__init__.py
+++ b/nonebot/drivers/__init__.py
@@ -6,10 +6,13 @@
 """
 
 import abc
+from typing import Dict, Type, Optional, Callable, TYPE_CHECKING
 
 from nonebot.log import logger
 from nonebot.config import Env, Config
-from nonebot.typing import Bot, Dict, Type, Union, Optional, Callable
+
+if TYPE_CHECKING:
+    from nonebot.adapters import BaseBot as Bot
 
 
 class BaseDriver(abc.ABC):
@@ -17,7 +20,7 @@ class BaseDriver(abc.ABC):
     Driver 基类。将后端框架封装，以满足适配器使用。
     """
 
-    _adapters: Dict[str, Type[Bot]] = {}
+    _adapters: Dict[str, Type["Bot"]] = {}
     """
     :类型: ``Dict[str, Type[Bot]]``
     :说明: 已注册的适配器列表
@@ -41,14 +44,14 @@ class BaseDriver(abc.ABC):
         :类型: ``Config``
         :说明: 配置对象
         """
-        self._clients: Dict[str, Bot] = {}
+        self._clients: Dict[str, "Bot"] = {}
         """
         :类型: ``Dict[str, Bot]``
         :说明: 已连接的 Bot
         """
 
     @classmethod
-    def register_adapter(cls, name: str, adapter: Type[Bot]):
+    def register_adapter(cls, name: str, adapter: Type["Bot"]):
         """
         :说明:
 
@@ -88,7 +91,7 @@ class BaseDriver(abc.ABC):
         raise NotImplementedError
 
     @property
-    def bots(self) -> Dict[str, Bot]:
+    def bots(self) -> Dict[str, "Bot"]:
         """
         :类型: ``Dict[str, Bot]``
         :说明: 获取当前所有已连接的 Bot
diff --git a/nonebot/drivers/fastapi.py b/nonebot/drivers/fastapi.py
index 841b82e5..073f3748 100644
--- a/nonebot/drivers/fastapi.py
+++ b/nonebot/drivers/fastapi.py
@@ -8,34 +8,22 @@ FastAPI 驱动适配
     https://fastapi.tiangolo.com/
 """
 
-import hmac
 import json
 import asyncio
 import logging
+from typing import Optional, Callable
 
 import uvicorn
 from fastapi.responses import Response
-from fastapi import Body, status, Header, Request, FastAPI, Depends, HTTPException
+from fastapi import Body, status, Request, FastAPI, HTTPException
 from starlette.websockets import WebSocketDisconnect, WebSocket as FastAPIWebSocket
 
 from nonebot.log import logger
+from nonebot.typing import overrides
 from nonebot.config import Env, Config
 from nonebot.utils import DataclassEncoder
 from nonebot.exception import RequestDenied
 from nonebot.drivers import BaseDriver, BaseWebSocket
-from nonebot.typing import Optional, Callable, overrides
-
-
-def get_auth_bearer(access_token: Optional[str] = Header(
-    None, alias="Authorization")):
-    if not access_token:
-        return None
-    scheme, _, param = access_token.partition(" ")
-    if scheme.lower() not in ["bearer", "token"]:
-        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED,
-                            detail="Not authenticated",
-                            headers={"WWW-Authenticate": "Bearer"})
-    return param
 
 
 class Driver(BaseDriver):
diff --git a/nonebot/matcher.py b/nonebot/matcher.py
index 1c2eabe6..e91a4e26 100644
--- a/nonebot/matcher.py
+++ b/nonebot/matcher.py
@@ -5,20 +5,25 @@
 该模块实现事件响应器的创建与运行，并提供一些快捷方法来帮助用户更好的与机器人进行 对话 。
 """
 
-from nonebot.log import logger
 import typing
 import inspect
 from functools import wraps
 from datetime import datetime
 from contextvars import ContextVar
 from collections import defaultdict
+from typing import Type, List, Dict, Union, Callable, Optional, NoReturn, TYPE_CHECKING
 
 from nonebot.rule import Rule
+from nonebot.log import logger
 from nonebot.permission import Permission, USER
-from nonebot.typing import Type, List, Dict, Union, Callable, Optional, NoReturn
-from nonebot.typing import Bot, Event, Handler, Message, ArgsParser, MessageSegment
+from nonebot.typing import State, Handler, ArgsParser
 from nonebot.exception import PausedException, RejectedException, FinishedException
 
+if TYPE_CHECKING:
+    from nonebot.adapters import (BaseBot as Bot, BaseEvent as Event,
+                                  BaseMessage as Message, BaseMessageSegment as
+                                  MessageSegment)
+
 matchers: Dict[int, List[Type["Matcher"]]] = defaultdict(list)
 """
 :类型: ``Dict[int, List[Type[Matcher]]]``
@@ -88,9 +93,9 @@ class Matcher(metaclass=MatcherMeta):
     :说明: 事件响应器过期时间点
     """
 
-    _default_state: dict = {}
+    _default_state: State = {}
     """
-    :类型: ``dict``
+    :类型: ``State``
     :说明: 事件响应器默认状态
     """
 
@@ -123,7 +128,7 @@ class Matcher(metaclass=MatcherMeta):
             block: bool = False,
             *,
             module: Optional[str] = None,
-            default_state: Optional[dict] = None,
+            default_state: Optional[State] = None,
             expire_time: Optional[datetime] = None) -> Type["Matcher"]:
         """
         :说明:
@@ -140,7 +145,7 @@ class Matcher(metaclass=MatcherMeta):
           * ``priority: int``: 响应优先级
           * ``block: bool``: 是否阻止事件向更低优先级的响应器传播
           * ``module: Optional[str]``: 事件响应器所在模块名称
-          * ``default_state: Optional[dict]``: 默认状态 ``state``
+          * ``default_state: Optional[State]``: 默认状态 ``state``
           * ``expire_time: Optional[datetime]``: 事件响应器最终有效时间点，过时即被删除
 
         :返回:
@@ -167,7 +172,7 @@ class Matcher(metaclass=MatcherMeta):
         return NewMatcher
 
     @classmethod
-    async def check_perm(cls, bot: Bot, event: Event) -> bool:
+    async def check_perm(cls, bot: "Bot", event: "Event") -> bool:
         """
         :说明:
 
@@ -185,7 +190,7 @@ class Matcher(metaclass=MatcherMeta):
         return await cls.permission(bot, event)
 
     @classmethod
-    async def check_rule(cls, bot: Bot, event: Event, state: dict) -> bool:
+    async def check_rule(cls, bot: "Bot", event: "Event", state: State) -> bool:
         """
         :说明:
 
@@ -195,7 +200,7 @@ class Matcher(metaclass=MatcherMeta):
 
           * ``bot: Bot``: Bot 对象
           * ``event: Event``: 上报事件
-          * ``state: dict``: 当前状态
+          * ``state: State``: 当前状态
 
         :返回:
 
@@ -248,7 +253,8 @@ class Matcher(metaclass=MatcherMeta):
           * 无
         """
 
-        async def _receive(bot: Bot, event: Event, state: dict) -> NoReturn:
+        async def _receive(bot: "Bot", event: "Event",
+                           state: State) -> NoReturn:
             raise PausedException
 
         if cls.handlers:
@@ -267,7 +273,7 @@ class Matcher(metaclass=MatcherMeta):
     def got(
         cls,
         key: str,
-        prompt: Optional[Union[str, Message, MessageSegment]] = None,
+        prompt: Optional[Union[str, "Message", "MessageSegment"]] = None,
         args_parser: Optional[ArgsParser] = None
     ) -> Callable[[Handler], Handler]:
         """
@@ -282,7 +288,7 @@ class Matcher(metaclass=MatcherMeta):
           * ``args_parser: Optional[ArgsParser]``: 可选参数解析函数，空则使用默认解析函数
         """
 
-        async def _key_getter(bot: Bot, event: Event, state: dict):
+        async def _key_getter(bot: "Bot", event: "Event", state: State):
             state["_current_key"] = key
             if key not in state:
                 if prompt:
@@ -292,7 +298,7 @@ class Matcher(metaclass=MatcherMeta):
             else:
                 state["_skip_key"] = True
 
-        async def _key_parser(bot: Bot, event: Event, state: dict):
+        async def _key_parser(bot: "Bot", event: "Event", state: State):
             if key in state and state.get("_skip_key"):
                 del state["_skip_key"]
                 return
@@ -310,7 +316,7 @@ class Matcher(metaclass=MatcherMeta):
                 parser = cls.handlers.pop()
 
                 @wraps(func)
-                async def wrapper(bot: Bot, event: Event, state: dict):
+                async def wrapper(bot: "Bot", event: "Event", state: State):
                     await parser(bot, event, state)
                     await func(bot, event, state)
                     if "_current_key" in state:
@@ -323,7 +329,8 @@ class Matcher(metaclass=MatcherMeta):
         return _decorator
 
     @classmethod
-    async def send(cls, message: Union[str, Message, MessageSegment], **kwargs):
+    async def send(cls, message: Union[str, "Message", "MessageSegment"],
+                   **kwargs):
         """
         :说明:
 
@@ -340,8 +347,8 @@ class Matcher(metaclass=MatcherMeta):
 
     @classmethod
     async def finish(cls,
-                     message: Optional[Union[str, Message,
-                                             MessageSegment]] = None,
+                     message: Optional[Union[str, "Message",
+                                             "MessageSegment"]] = None,
                      **kwargs) -> NoReturn:
         """
         :说明:
@@ -361,8 +368,8 @@ class Matcher(metaclass=MatcherMeta):
 
     @classmethod
     async def pause(cls,
-                    prompt: Optional[Union[str, Message,
-                                           MessageSegment]] = None,
+                    prompt: Optional[Union[str, "Message",
+                                           "MessageSegment"]] = None,
                     **kwargs) -> NoReturn:
         """
         :说明:
@@ -382,8 +389,8 @@ class Matcher(metaclass=MatcherMeta):
 
     @classmethod
     async def reject(cls,
-                     prompt: Optional[Union[str, Message,
-                                            MessageSegment]] = None,
+                     prompt: Optional[Union[str, "Message",
+                                            "MessageSegment"]] = None,
                      **kwargs) -> NoReturn:
         """
         :说明:
@@ -402,7 +409,7 @@ class Matcher(metaclass=MatcherMeta):
         raise RejectedException
 
     # 运行handlers
-    async def run(self, bot: Bot, event: Event, state: dict):
+    async def run(self, bot: "Bot", event: "Event", state: State):
         b_t = current_bot.set(bot)
         e_t = current_event.set(event)
         try:
diff --git a/nonebot/message.py b/nonebot/message.py
index d13731f8..89e04835 100644
--- a/nonebot/message.py
+++ b/nonebot/message.py
@@ -7,14 +7,17 @@ NoneBot 内部处理并按优先级分发事件给所有事件响应器，提供
 
 import asyncio
 from datetime import datetime
+from typing import Set, Type, Optional, Iterable, TYPE_CHECKING
 
 from nonebot.log import logger
 from nonebot.rule import TrieRule
 from nonebot.utils import escape_tag
 from nonebot.matcher import matchers, Matcher
-from nonebot.typing import Set, Type, Optional, Iterable, Bot, Event
 from nonebot.exception import IgnoredException, StopPropagation
-from nonebot.typing import EventPreProcessor, RunPreProcessor, EventPostProcessor, RunPostProcessor
+from nonebot.typing import State, EventPreProcessor, RunPreProcessor, EventPostProcessor, RunPostProcessor
+
+if TYPE_CHECKING:
+    from nonebot.adapters import BaseBot as Bot, BaseEvent as Event
 
 _event_preprocessors: Set[EventPreProcessor] = set()
 _event_postprocessors: Set[EventPostProcessor] = set()
@@ -34,7 +37,7 @@ def event_preprocessor(func: EventPreProcessor) -> EventPreProcessor:
 
       * ``bot: Bot``: Bot 对象
       * ``event: Event``: Event 对象
-      * ``state: dict``: 当前 State
+      * ``state: State``: 当前 State
     """
     _event_preprocessors.add(func)
     return func
@@ -52,7 +55,7 @@ def event_postprocessor(func: EventPostProcessor) -> EventPostProcessor:
 
       * ``bot: Bot``: Bot 对象
       * ``event: Event``: Event 对象
-      * ``state: dict``: 当前事件运行前 State
+      * ``state: State``: 当前事件运行前 State
     """
     _event_postprocessors.add(func)
     return func
@@ -71,7 +74,7 @@ def run_preprocessor(func: RunPreProcessor) -> RunPreProcessor:
       * ``matcher: Matcher``: 当前要运行的事件响应器
       * ``bot: Bot``: Bot 对象
       * ``event: Event``: Event 对象
-      * ``state: dict``: 当前 State
+      * ``state: State``: 当前 State
     """
     _run_preprocessors.add(func)
     return func
@@ -91,18 +94,18 @@ def run_postprocessor(func: RunPostProcessor) -> RunPostProcessor:
       * ``exception: Optional[Exception]``: 事件响应器运行错误（如果存在）
       * ``bot: Bot``: Bot 对象
       * ``event: Event``: Event 对象
-      * ``state: dict``: 当前 State
+      * ``state: State``: 当前 State
     """
     _run_postprocessors.add(func)
     return func
 
 
-async def _check_matcher(priority: int, bot: Bot, event: Event,
-                         state: dict) -> Iterable[Type[Matcher]]:
+async def _check_matcher(priority: int, bot: "Bot", event: "Event",
+                         state: State) -> Iterable[Type[Matcher]]:
     current_matchers = matchers[priority].copy()
 
-    async def _check(Matcher: Type[Matcher], bot: Bot, event: Event,
-                     state: dict) -> Optional[Type[Matcher]]:
+    async def _check(Matcher: Type[Matcher], bot: "Bot", event: "Event",
+                     state: State) -> Optional[Type[Matcher]]:
         try:
             if (not Matcher.expire_time or datetime.now() <= Matcher.expire_time
                ) and await Matcher.check_perm(
@@ -136,8 +139,8 @@ async def _check_matcher(priority: int, bot: Bot, event: Event,
     return filter(lambda x: x, results)
 
 
-async def _run_matcher(Matcher: Type[Matcher], bot: Bot, event: Event,
-                       state: dict) -> None:
+async def _run_matcher(Matcher: Type[Matcher], bot: "Bot", event: "Event",
+                       state: State) -> None:
     logger.info(f"Event will be handled by {Matcher}")
 
     matcher = Matcher()
@@ -186,7 +189,7 @@ async def _run_matcher(Matcher: Type[Matcher], bot: Bot, event: Event,
     return
 
 
-async def handle_event(bot: Bot, event: Event):
+async def handle_event(bot: "Bot", event: "Event"):
     """
     :说明:
 
diff --git a/nonebot/permission.py b/nonebot/permission.py
index f4c793b0..62d5f62f 100644
--- a/nonebot/permission.py
+++ b/nonebot/permission.py
@@ -10,16 +10,21 @@
 """
 
 import asyncio
+from typing import Union, Optional, Callable, NoReturn, Awaitable, TYPE_CHECKING
 
 from nonebot.utils import run_sync
-from nonebot.typing import Bot, Event, Union, NoReturn, Optional, Callable, Awaitable, PermissionChecker
+from nonebot.typing import PermissionChecker
+
+if TYPE_CHECKING:
+    from nonebot.adapters import BaseBot as Bot, BaseEvent as Event
 
 
 class Permission:
     __slots__ = ("checkers",)
 
-    def __init__(self, *checkers: Callable[[Bot, Event],
-                                           Awaitable[bool]]) -> None:
+    def __init__(
+            self, *checkers: Callable[["Bot", "Event"],
+                                      Awaitable[bool]]) -> None:
         """
         :参数:
 
@@ -36,7 +41,7 @@ class Permission:
           * ``Set[Callable[[Bot, Event], Awaitable[bool]]]``
         """
 
-    async def __call__(self, bot: Bot, event: Event) -> bool:
+    async def __call__(self, bot: "Bot", event: "Event") -> bool:
         """
         :说明:
 
@@ -75,19 +80,19 @@ class Permission:
         return Permission(*checkers)
 
 
-async def _message(bot: Bot, event: Event) -> bool:
+async def _message(bot: "Bot", event: "Event") -> bool:
     return event.type == "message"
 
 
-async def _notice(bot: Bot, event: Event) -> bool:
+async def _notice(bot: "Bot", event: "Event") -> bool:
     return event.type == "notice"
 
 
-async def _request(bot: Bot, event: Event) -> bool:
+async def _request(bot: "Bot", event: "Event") -> bool:
     return event.type == "request"
 
 
-async def _metaevent(bot: Bot, event: Event) -> bool:
+async def _metaevent(bot: "Bot", event: "Event") -> bool:
     return event.type == "meta_event"
 
 
@@ -121,28 +126,28 @@ def USER(*user: int, perm: Permission = Permission()):
       * ``perm: Permission``: 需要同时满足的权限
     """
 
-    async def _user(bot: Bot, event: Event) -> bool:
+    async def _user(bot: "Bot", event: "Event") -> bool:
         return event.type == "message" and event.user_id in user and await perm(
             bot, event)
 
     return Permission(_user)
 
 
-async def _private(bot: Bot, event: Event) -> bool:
+async def _private(bot: "Bot", event: "Event") -> bool:
     return event.type == "message" and event.detail_type == "private"
 
 
-async def _private_friend(bot: Bot, event: Event) -> bool:
+async def _private_friend(bot: "Bot", event: "Event") -> bool:
     return (event.type == "message" and event.detail_type == "private" and
             event.sub_type == "friend")
 
 
-async def _private_group(bot: Bot, event: Event) -> bool:
+async def _private_group(bot: "Bot", event: "Event") -> bool:
     return (event.type == "message" and event.detail_type == "private" and
             event.sub_type == "group")
 
 
-async def _private_other(bot: Bot, event: Event) -> bool:
+async def _private_other(bot: "Bot", event: "Event") -> bool:
     return (event.type == "message" and event.detail_type == "private" and
             event.sub_type == "other")
 
@@ -165,21 +170,21 @@ PRIVATE_OTHER = Permission(_private_other)
 """
 
 
-async def _group(bot: Bot, event: Event) -> bool:
+async def _group(bot: "Bot", event: "Event") -> bool:
     return event.type == "message" and event.detail_type == "group"
 
 
-async def _group_member(bot: Bot, event: Event) -> bool:
+async def _group_member(bot: "Bot", event: "Event") -> bool:
     return (event.type == "message" and event.detail_type == "group" and
             event.sender.get("role") == "member")
 
 
-async def _group_admin(bot: Bot, event: Event) -> bool:
+async def _group_admin(bot: "Bot", event: "Event") -> bool:
     return (event.type == "message" and event.detail_type == "group" and
             event.sender.get("role") == "admin")
 
 
-async def _group_owner(bot: Bot, event: Event) -> bool:
+async def _group_owner(bot: "Bot", event: "Event") -> bool:
     return (event.type == "message" and event.detail_type == "group" and
             event.sender.get("role") == "owner")
 
@@ -206,7 +211,7 @@ GROUP_OWNER = Permission(_group_owner)
 """
 
 
-async def _superuser(bot: Bot, event: Event) -> bool:
+async def _superuser(bot: "Bot", event: "Event") -> bool:
     return event.type == "message" and event.user_id in bot.config.superusers
 
 
diff --git a/nonebot/plugin.py b/nonebot/plugin.py
index 57410566..527ff533 100644
--- a/nonebot/plugin.py
+++ b/nonebot/plugin.py
@@ -9,17 +9,17 @@ import re
 import sys
 import pkgutil
 import importlib
-from datetime import datetime
+from types import ModuleType
 from dataclasses import dataclass
 from importlib._bootstrap import _load
 from contextvars import Context, ContextVar, copy_context
+from typing import Any, Set, List, Dict, Type, Tuple, Union, Optional
 
 from nonebot.log import logger
 from nonebot.matcher import Matcher
 from nonebot.permission import Permission
-from nonebot.typing import Handler, RuleChecker
+from nonebot.typing import State, Handler, RuleChecker
 from nonebot.rule import Rule, startswith, endswith, keyword, command, regex
-from nonebot.typing import Any, Set, List, Dict, Type, Tuple, Union, Optional, ArgsParser, ModuleType
 
 plugins: Dict[str, "Plugin"] = {}
 """
@@ -108,7 +108,7 @@ def on(type: str = "",
        temp: bool = False,
        priority: int = 1,
        block: bool = False,
-       state: Optional[dict] = None) -> Type[Matcher]:
+       state: Optional[State] = None) -> Type[Matcher]:
     """
     :说明:
 
@@ -123,7 +123,7 @@ def on(type: str = "",
       * ``temp: bool``: 是否为临时事件响应器（仅执行一次）
       * ``priority: int``: 事件响应器优先级
       * ``block: bool``: 是否阻止事件向更低优先级传递
-      * ``state: Optional[dict]``: 默认的 state
+      * ``state: Optional[State]``: 默认的 state
 
     :返回:
 
@@ -147,7 +147,7 @@ def on_metaevent(rule: Optional[Union[Rule, RuleChecker]] = None,
                  temp: bool = False,
                  priority: int = 1,
                  block: bool = False,
-                 state: Optional[dict] = None) -> Type[Matcher]:
+                 state: Optional[State] = None) -> Type[Matcher]:
     """
     :说明:
 
@@ -160,7 +160,7 @@ def on_metaevent(rule: Optional[Union[Rule, RuleChecker]] = None,
       * ``temp: bool``: 是否为临时事件响应器（仅执行一次）
       * ``priority: int``: 事件响应器优先级
       * ``block: bool``: 是否阻止事件向更低优先级传递
-      * ``state: Optional[dict]``: 默认的 state
+      * ``state: Optional[State]``: 默认的 state
 
     :返回:
 
@@ -185,7 +185,7 @@ def on_message(rule: Optional[Union[Rule, RuleChecker]] = None,
                temp: bool = False,
                priority: int = 1,
                block: bool = True,
-               state: Optional[dict] = None) -> Type[Matcher]:
+               state: Optional[State] = None) -> Type[Matcher]:
     """
     :说明:
 
@@ -199,7 +199,7 @@ def on_message(rule: Optional[Union[Rule, RuleChecker]] = None,
       * ``temp: bool``: 是否为临时事件响应器（仅执行一次）
       * ``priority: int``: 事件响应器优先级
       * ``block: bool``: 是否阻止事件向更低优先级传递
-      * ``state: Optional[dict]``: 默认的 state
+      * ``state: Optional[State]``: 默认的 state
 
     :返回:
 
@@ -223,7 +223,7 @@ def on_notice(rule: Optional[Union[Rule, RuleChecker]] = None,
               temp: bool = False,
               priority: int = 1,
               block: bool = False,
-              state: Optional[dict] = None) -> Type[Matcher]:
+              state: Optional[State] = None) -> Type[Matcher]:
     """
     :说明:
 
@@ -236,7 +236,7 @@ def on_notice(rule: Optional[Union[Rule, RuleChecker]] = None,
       * ``temp: bool``: 是否为临时事件响应器（仅执行一次）
       * ``priority: int``: 事件响应器优先级
       * ``block: bool``: 是否阻止事件向更低优先级传递
-      * ``state: Optional[dict]``: 默认的 state
+      * ``state: Optional[State]``: 默认的 state
 
     :返回:
 
@@ -260,7 +260,7 @@ def on_request(rule: Optional[Union[Rule, RuleChecker]] = None,
                temp: bool = False,
                priority: int = 1,
                block: bool = False,
-               state: Optional[dict] = None) -> Type[Matcher]:
+               state: Optional[State] = None) -> Type[Matcher]:
     """
     :说明:
 
@@ -273,7 +273,7 @@ def on_request(rule: Optional[Union[Rule, RuleChecker]] = None,
       * ``temp: bool``: 是否为临时事件响应器（仅执行一次）
       * ``priority: int``: 事件响应器优先级
       * ``block: bool``: 是否阻止事件向更低优先级传递
-      * ``state: Optional[dict]``: 默认的 state
+      * ``state: Optional[State]``: 默认的 state
 
     :返回:
 
@@ -308,7 +308,7 @@ def on_startswith(msg: str,
       * ``temp: bool``: 是否为临时事件响应器（仅执行一次）
       * ``priority: int``: 事件响应器优先级
       * ``block: bool``: 是否阻止事件向更低优先级传递
-      * ``state: Optional[dict]``: 默认的 state
+      * ``state: Optional[State]``: 默认的 state
 
     :返回:
 
@@ -334,7 +334,7 @@ def on_endswith(msg: str,
       * ``temp: bool``: 是否为临时事件响应器（仅执行一次）
       * ``priority: int``: 事件响应器优先级
       * ``block: bool``: 是否阻止事件向更低优先级传递
-      * ``state: Optional[dict]``: 默认的 state
+      * ``state: Optional[State]``: 默认的 state
 
     :返回:
 
@@ -360,7 +360,7 @@ def on_keyword(keywords: Set[str],
       * ``temp: bool``: 是否为临时事件响应器（仅执行一次）
       * ``priority: int``: 事件响应器优先级
       * ``block: bool``: 是否阻止事件向更低优先级传递
-      * ``state: Optional[dict]``: 默认的 state
+      * ``state: Optional[State]``: 默认的 state
 
     :返回:
 
@@ -390,14 +390,14 @@ def on_command(cmd: Union[str, Tuple[str, ...]],
       * ``temp: bool``: 是否为临时事件响应器（仅执行一次）
       * ``priority: int``: 事件响应器优先级
       * ``block: bool``: 是否阻止事件向更低优先级传递
-      * ``state: Optional[dict]``: 默认的 state
+      * ``state: Optional[State]``: 默认的 state
 
     :返回:
 
       - ``Type[Matcher]``
     """
 
-    async def _strip_cmd(bot, event, state: dict):
+    async def _strip_cmd(bot, event, state: State):
         message = event.message
         event.message = message.__class__(
             str(message)[len(state["_prefix"]["raw_command"]):].strip())
@@ -430,7 +430,7 @@ def on_regex(pattern: str,
       * ``temp: bool``: 是否为临时事件响应器（仅执行一次）
       * ``priority: int``: 事件响应器优先级
       * ``block: bool``: 是否阻止事件向更低优先级传递
-      * ``state: Optional[dict]``: 默认的 state
+      * ``state: Optional[State]``: 默认的 state
 
     :返回:
 
@@ -521,7 +521,7 @@ class MatcherGroup:
           * ``temp: bool``: 是否为临时事件响应器（仅执行一次）
           * ``priority: int``: 事件响应器优先级
           * ``block: bool``: 是否阻止事件向更低优先级传递
-          * ``state: Optional[dict]``: 默认的 state
+          * ``state: Optional[State]``: 默认的 state
 
         :返回:
 
@@ -547,7 +547,7 @@ class MatcherGroup:
           * ``temp: bool``: 是否为临时事件响应器（仅执行一次）
           * ``priority: int``: 事件响应器优先级
           * ``block: bool``: 是否阻止事件向更低优先级传递
-          * ``state: Optional[dict]``: 默认的 state
+          * ``state: Optional[State]``: 默认的 state
 
         :返回:
 
@@ -575,7 +575,7 @@ class MatcherGroup:
           * ``temp: bool``: 是否为临时事件响应器（仅执行一次）
           * ``priority: int``: 事件响应器优先级
           * ``block: bool``: 是否阻止事件向更低优先级传递
-          * ``state: Optional[dict]``: 默认的 state
+          * ``state: Optional[State]``: 默认的 state
 
         :返回:
 
@@ -602,7 +602,7 @@ class MatcherGroup:
           * ``temp: bool``: 是否为临时事件响应器（仅执行一次）
           * ``priority: int``: 事件响应器优先级
           * ``block: bool``: 是否阻止事件向更低优先级传递
-          * ``state: Optional[dict]``: 默认的 state
+          * ``state: Optional[State]``: 默认的 state
 
         :返回:
 
@@ -629,7 +629,7 @@ class MatcherGroup:
           * ``temp: bool``: 是否为临时事件响应器（仅执行一次）
           * ``priority: int``: 事件响应器优先级
           * ``block: bool``: 是否阻止事件向更低优先级传递
-          * ``state: Optional[dict]``: 默认的 state
+          * ``state: Optional[State]``: 默认的 state
 
         :返回:
 
@@ -661,7 +661,7 @@ class MatcherGroup:
           * ``temp: bool``: 是否为临时事件响应器（仅执行一次）
           * ``priority: int``: 事件响应器优先级
           * ``block: bool``: 是否阻止事件向更低优先级传递
-          * ``state: Optional[dict]``: 默认的 state
+          * ``state: Optional[State]``: 默认的 state
 
         :返回:
 
@@ -687,7 +687,7 @@ class MatcherGroup:
           * ``temp: bool``: 是否为临时事件响应器（仅执行一次）
           * ``priority: int``: 事件响应器优先级
           * ``block: bool``: 是否阻止事件向更低优先级传递
-          * ``state: Optional[dict]``: 默认的 state
+          * ``state: Optional[State]``: 默认的 state
 
         :返回:
 
@@ -713,7 +713,7 @@ class MatcherGroup:
           * ``temp: bool``: 是否为临时事件响应器（仅执行一次）
           * ``priority: int``: 事件响应器优先级
           * ``block: bool``: 是否阻止事件向更低优先级传递
-          * ``state: Optional[dict]``: 默认的 state
+          * ``state: Optional[State]``: 默认的 state
 
         :返回:
 
@@ -743,14 +743,14 @@ class MatcherGroup:
           * ``temp: bool``: 是否为临时事件响应器（仅执行一次）
           * ``priority: int``: 事件响应器优先级
           * ``block: bool``: 是否阻止事件向更低优先级传递
-          * ``state: Optional[dict]``: 默认的 state
+          * ``state: Optional[State]``: 默认的 state
 
         :返回:
 
           - ``Type[Matcher]``
         """
 
-        async def _strip_cmd(bot, event, state: dict):
+        async def _strip_cmd(bot, event, state: State):
             message = event.message
             event.message = message.__class__(
                 str(message)[len(state["_prefix"]["raw_command"]):].strip())
@@ -785,7 +785,7 @@ class MatcherGroup:
           * ``temp: bool``: 是否为临时事件响应器（仅执行一次）
           * ``priority: int``: 事件响应器优先级
           * ``block: bool``: 是否阻止事件向更低优先级传递
-          * ``state: Optional[dict]``: 默认的 state
+          * ``state: Optional[State]``: 默认的 state
 
         :返回:
 
diff --git a/nonebot/plugin.pyi b/nonebot/plugin.pyi
index 607c1d27..a4617f80 100644
--- a/nonebot/plugin.pyi
+++ b/nonebot/plugin.pyi
@@ -1,8 +1,12 @@
 import re
+from types import ModuleType
 from contextvars import ContextVar
+from typing import Any, Set, List, Dict, Type, Tuple, Union, Optional
 
-from nonebot.typing import Rule, Matcher, Handler, Permission, RuleChecker
-from nonebot.typing import Set, List, Dict, Type, Tuple, Union, Optional, ModuleType
+from nonebot.rule import Rule
+from nonebot.matcher import Matcher
+from nonebot.permission import Permission
+from nonebot.typing import State, Handler, RuleChecker
 
 plugins: Dict[str, "Plugin"] = ...
 
@@ -37,7 +41,7 @@ def on(type: str = ...,
        temp: bool = ...,
        priority: int = ...,
        block: bool = ...,
-       state: Optional[dict] = ...) -> Type[Matcher]:
+       state: Optional[State] = ...) -> Type[Matcher]:
     ...
 
 
@@ -47,7 +51,7 @@ def on_metaevent(rule: Optional[Union[Rule, RuleChecker]] = ...,
                  temp: bool = ...,
                  priority: int = ...,
                  block: bool = ...,
-                 state: Optional[dict] = ...) -> Type[Matcher]:
+                 state: Optional[State] = ...) -> Type[Matcher]:
     ...
 
 
@@ -58,7 +62,7 @@ def on_message(rule: Optional[Union[Rule, RuleChecker]] = ...,
                temp: bool = ...,
                priority: int = ...,
                block: bool = ...,
-               state: Optional[dict] = ...) -> Type[Matcher]:
+               state: Optional[State] = ...) -> Type[Matcher]:
     ...
 
 
@@ -68,7 +72,7 @@ def on_notice(rule: Optional[Union[Rule, RuleChecker]] = ...,
               temp: bool = ...,
               priority: int = ...,
               block: bool = ...,
-              state: Optional[dict] = ...) -> Type[Matcher]:
+              state: Optional[State] = ...) -> Type[Matcher]:
     ...
 
 
@@ -78,7 +82,7 @@ def on_request(rule: Optional[Union[Rule, RuleChecker]] = ...,
                temp: bool = ...,
                priority: int = ...,
                block: bool = ...,
-               state: Optional[dict] = ...) -> Type[Matcher]:
+               state: Optional[State] = ...) -> Type[Matcher]:
     ...
 
 
@@ -90,7 +94,7 @@ def on_startswith(msg: str,
                   temp: bool = ...,
                   priority: int = ...,
                   block: bool = ...,
-                  state: Optional[dict] = ...) -> Type[Matcher]:
+                  state: Optional[State] = ...) -> Type[Matcher]:
     ...
 
 
@@ -102,7 +106,7 @@ def on_endswith(msg: str,
                 temp: bool = ...,
                 priority: int = ...,
                 block: bool = ...,
-                state: Optional[dict] = ...) -> Type[Matcher]:
+                state: Optional[State] = ...) -> Type[Matcher]:
     ...
 
 
@@ -114,7 +118,7 @@ def on_keyword(keywords: Set[str],
                temp: bool = ...,
                priority: int = ...,
                block: bool = ...,
-               state: Optional[dict] = ...) -> Type[Matcher]:
+               state: Optional[State] = ...) -> Type[Matcher]:
     ...
 
 
@@ -127,7 +131,7 @@ def on_command(cmd: Union[str, Tuple[str, ...]],
                temp: bool = ...,
                priority: int = ...,
                block: bool = ...,
-               state: Optional[dict] = ...) -> Type[Matcher]:
+               state: Optional[State] = ...) -> Type[Matcher]:
     ...
 
 
@@ -140,7 +144,7 @@ def on_regex(pattern: str,
              temp: bool = ...,
              priority: int = ...,
              block: bool = ...,
-             state: Optional[dict] = ...) -> Type[Matcher]:
+             state: Optional[State] = ...) -> Type[Matcher]:
     ...
 
 
@@ -183,8 +187,9 @@ class CommandGroup:
                  temp: bool = ...,
                  priority: int = ...,
                  block: bool = ...,
-                 state: Optional[dict] = ...):
-        ...
+                 state: Optional[State] = ...):
+        self.basecmd: Tuple[str, ...] = ...
+        self.base_kwargs: Dict[str, Any] = ...
 
     def command(self,
                 cmd: Union[str, Tuple[str, ...]],
@@ -196,7 +201,7 @@ class CommandGroup:
                 temp: bool = ...,
                 priority: int = ...,
                 block: bool = ...,
-                state: Optional[dict] = ...) -> Type[Matcher]:
+                state: Optional[State] = ...) -> Type[Matcher]:
         ...
 
 
@@ -211,7 +216,7 @@ class MatcherGroup:
                  temp: bool = ...,
                  priority: int = ...,
                  block: bool = ...,
-                 state: Optional[dict] = ...):
+                 state: Optional[State] = ...):
         ...
 
     def on(self,
@@ -223,7 +228,7 @@ class MatcherGroup:
            temp: bool = ...,
            priority: int = ...,
            block: bool = ...,
-           state: Optional[dict] = ...) -> Type[Matcher]:
+           state: Optional[State] = ...) -> Type[Matcher]:
         ...
 
     def on_metaevent(self,
@@ -233,7 +238,7 @@ class MatcherGroup:
                      temp: bool = False,
                      priority: int = 1,
                      block: bool = False,
-                     state: Optional[dict] = None) -> Type[Matcher]:
+                     state: Optional[State] = None) -> Type[Matcher]:
         ...
 
     def on_message(self,
@@ -244,7 +249,7 @@ class MatcherGroup:
                    temp: bool = False,
                    priority: int = 1,
                    block: bool = True,
-                   state: Optional[dict] = None) -> Type[Matcher]:
+                   state: Optional[State] = None) -> Type[Matcher]:
         ...
 
     def on_notice(self,
@@ -254,7 +259,7 @@ class MatcherGroup:
                   temp: bool = False,
                   priority: int = 1,
                   block: bool = False,
-                  state: Optional[dict] = None) -> Type[Matcher]:
+                  state: Optional[State] = None) -> Type[Matcher]:
         ...
 
     def on_request(self,
@@ -264,7 +269,7 @@ class MatcherGroup:
                    temp: bool = False,
                    priority: int = 1,
                    block: bool = False,
-                   state: Optional[dict] = None) -> Type[Matcher]:
+                   state: Optional[State] = None) -> Type[Matcher]:
         ...
 
     def on_startswith(self,
@@ -276,7 +281,7 @@ class MatcherGroup:
                       temp: bool = ...,
                       priority: int = ...,
                       block: bool = ...,
-                      state: Optional[dict] = ...) -> Type[Matcher]:
+                      state: Optional[State] = ...) -> Type[Matcher]:
         ...
 
     def on_endswith(self,
@@ -288,7 +293,7 @@ class MatcherGroup:
                     temp: bool = ...,
                     priority: int = ...,
                     block: bool = ...,
-                    state: Optional[dict] = ...) -> Type[Matcher]:
+                    state: Optional[State] = ...) -> Type[Matcher]:
         ...
 
     def on_keyword(self,
@@ -300,7 +305,7 @@ class MatcherGroup:
                    temp: bool = ...,
                    priority: int = ...,
                    block: bool = ...,
-                   state: Optional[dict] = ...) -> Type[Matcher]:
+                   state: Optional[State] = ...) -> Type[Matcher]:
         ...
 
     def on_command(self,
@@ -313,7 +318,7 @@ class MatcherGroup:
                    temp: bool = ...,
                    priority: int = ...,
                    block: bool = ...,
-                   state: Optional[dict] = ...) -> Type[Matcher]:
+                   state: Optional[State] = ...) -> Type[Matcher]:
         ...
 
     def on_regex(self,
@@ -326,5 +331,5 @@ class MatcherGroup:
                  temp: bool = ...,
                  priority: int = ...,
                  block: bool = ...,
-                 state: Optional[dict] = ...) -> Type[Matcher]:
+                 state: Optional[State] = ...) -> Type[Matcher]:
         ...
diff --git a/nonebot/plugins/base.py b/nonebot/plugins/base.py
index c937f5c0..bb6c4164 100644
--- a/nonebot/plugins/base.py
+++ b/nonebot/plugins/base.py
@@ -1,15 +1,16 @@
 from functools import reduce
 
 from nonebot.rule import to_me
+from nonebot.typing import State
 from nonebot.plugin import on_command
 from nonebot.permission import SUPERUSER
-from nonebot.typing import Bot, Event, MessageSegment
+from nonebot.adapters import BaseBot as Bot, BaseEvent as Event, BaseMessageSegment as MessageSegment
 
 say = on_command("say", to_me(), permission=SUPERUSER)
 
 
 @say.handle()
-async def say_unescape(bot: Bot, event: Event, state: dict):
+async def say_unescape(bot: Bot, event: Event, state: State):
     Message = event.message.__class__
 
     def _unescape(message: Message, segment: MessageSegment):
@@ -25,7 +26,7 @@ echo = on_command("echo", to_me())
 
 
 @echo.handle()
-async def echo_escape(bot: Bot, event: Event, state: dict):
+async def echo_escape(bot: Bot, event: Event, state: State):
     # Message = event.message.__class__
     # MessageSegment = event.message[0].__class__
 
diff --git a/nonebot/rule.py b/nonebot/rule.py
index c58d5874..47ed8fc7 100644
--- a/nonebot/rule.py
+++ b/nonebot/rule.py
@@ -12,13 +12,17 @@
 import re
 import asyncio
 from itertools import product
+from typing import Any, Dict, Union, Tuple, Optional, Callable, NoReturn, Awaitable, TYPE_CHECKING
 
 from pygtrie import CharTrie
 
 from nonebot import get_driver
 from nonebot.log import logger
 from nonebot.utils import run_sync
-from nonebot.typing import Bot, Any, Dict, Event, Union, Tuple, NoReturn, Optional, Callable, Awaitable, RuleChecker
+from nonebot.typing import State, RuleChecker
+
+if TYPE_CHECKING:
+    from nonebot.adapters import BaseBot as Bot, BaseEvent as Event
 
 
 class Rule:
@@ -39,12 +43,12 @@ class Rule:
     __slots__ = ("checkers",)
 
     def __init__(
-            self, *checkers: Callable[[Bot, Event, dict],
+            self, *checkers: Callable[["Bot", "Event", State],
                                       Awaitable[bool]]) -> None:
         """
         :参数:
 
-          * ``*checkers: Callable[[Bot, Event, dict], Awaitable[bool]]``: **异步** RuleChecker
+          * ``*checkers: Callable[[Bot, Event, State], Awaitable[bool]]``: **异步** RuleChecker
 
         """
         self.checkers = set(checkers)
@@ -55,10 +59,10 @@ class Rule:
 
         :类型:
 
-          * ``Set[Callable[[Bot, Event, dict], Awaitable[bool]]]``
+          * ``Set[Callable[[Bot, Event, State], Awaitable[bool]]]``
         """
 
-    async def __call__(self, bot: Bot, event: Event, state: dict) -> bool:
+    async def __call__(self, bot: "Bot", event: "Event", state: State) -> bool:
         """
         :说明:
 
@@ -68,7 +72,7 @@ class Rule:
 
           * ``bot: Bot``: Bot 对象
           * ``event: Event``: Event 对象
-          * ``state: dict``: 当前 State
+          * ``state: State``: 当前 State
 
         :返回:
 
@@ -113,8 +117,8 @@ class TrieRule:
         cls.suffix[suffix[::-1]] = value
 
     @classmethod
-    def get_value(cls, bot: Bot, event: Event,
-                  state: dict) -> Tuple[Dict[str, Any], Dict[str, Any]]:
+    def get_value(cls, bot: "Bot", event: "Event",
+                  state: State) -> Tuple[Dict[str, Any], Dict[str, Any]]:
         if event.type != "message":
             state["_prefix"] = {"raw_command": None, "command": None}
             state["_suffix"] = {"raw_command": None, "command": None}
@@ -176,7 +180,7 @@ def startswith(msg: str) -> Rule:
       * ``msg: str``: 消息开头字符串
     """
 
-    async def _startswith(bot: Bot, event: Event, state: dict) -> bool:
+    async def _startswith(bot: "Bot", event: "Event", state: State) -> bool:
         return event.plain_text.startswith(msg)
 
     return Rule(_startswith)
@@ -193,7 +197,7 @@ def endswith(msg: str) -> Rule:
       * ``msg: str``: 消息结尾字符串
     """
 
-    async def _endswith(bot: Bot, event: Event, state: dict) -> bool:
+    async def _endswith(bot: "Bot", event: "Event", state: State) -> bool:
         return event.plain_text.endswith(msg)
 
     return Rule(_endswith)
@@ -210,7 +214,7 @@ def keyword(*keywords: str) -> Rule:
       * ``*keywords: str``: 关键词
     """
 
-    async def _keyword(bot: Bot, event: Event, state: dict) -> bool:
+    async def _keyword(bot: "Bot", event: "Event", state: State) -> bool:
         return bool(event.plain_text and
                     any(keyword in event.plain_text for keyword in keywords))
 
@@ -256,7 +260,7 @@ def command(*cmds: Union[str, Tuple[str, ...]]) -> Rule:
             for start, sep in product(command_start, command_sep):
                 TrieRule.add_prefix(f"{start}{sep.join(command)}", command)
 
-    async def _command(bot: Bot, event: Event, state: dict) -> bool:
+    async def _command(bot: "Bot", event: "Event", state: State) -> bool:
         return state["_prefix"]["command"] in commands
 
     return Rule(_command)
@@ -282,7 +286,7 @@ def regex(regex: str, flags: Union[int, re.RegexFlag] = 0) -> Rule:
 
     pattern = re.compile(regex, flags)
 
-    async def _regex(bot: Bot, event: Event, state: dict) -> bool:
+    async def _regex(bot: "Bot", event: "Event", state: State) -> bool:
         matched = pattern.search(str(event.message))
         if matched:
             state["_matched"] = matched.group()
@@ -305,7 +309,7 @@ def to_me() -> Rule:
       * 无
     """
 
-    async def _to_me(bot: Bot, event: Event, state: dict) -> bool:
+    async def _to_me(bot: "Bot", event: "Event", state: State) -> bool:
         return bool(event.to_me)
 
     return Rule(_to_me)
diff --git a/nonebot/typing.py b/nonebot/typing.py
index cdc6ee38..8ed2a4a5 100644
--- a/nonebot/typing.py
+++ b/nonebot/typing.py
@@ -29,7 +29,7 @@ if TYPE_CHECKING:
     from nonebot.drivers import BaseDriver, BaseWebSocket
     from nonebot.permission import Permission as PermissionClass
     from nonebot.adapters import BaseBot, BaseEvent, BaseMessage, BaseMessageSegment
-    from nonebot.matcher import Matcher as MatcherClass, MatcherGroup as MatcherGroupClass
+    from nonebot.matcher import Matcher as MatcherClass
 
 
 def overrides(InterfaceClass: object):
@@ -92,34 +92,42 @@ MessageSegment = TypeVar("MessageSegment", bound="BaseMessageSegment")
   所有 MessageSegment 的基类。
 """
 
-EventPreProcessor = Callable[[Bot, Event, dict], Awaitable[None]]
+State = Dict[Any, Any]
 """
-:类型: ``Callable[[Bot, Event, dict], Awaitable[None]]``
+:类型: ``Dict[Any, Any]``
+
+:说明:
+
+  事件处理状态 State 类型
+"""
+EventPreProcessor = Callable[[Bot, Event, State], Awaitable[None]]
+"""
+:类型: ``Callable[[Bot, Event, State], Awaitable[None]]``
 
 :说明:
 
   事件预处理函数 EventPreProcessor 类型
 """
-EventPostProcessor = Callable[[Bot, Event, dict], Awaitable[None]]
+EventPostProcessor = Callable[[Bot, Event, State], Awaitable[None]]
 """
-:类型: ``Callable[[Bot, Event, dict], Awaitable[None]]``
+:类型: ``Callable[[Bot, Event, State], Awaitable[None]]``
 
 :说明:
 
   事件预处理函数 EventPostProcessor 类型
 """
-RunPreProcessor = Callable[["Matcher", Bot, Event, dict], Awaitable[None]]
+RunPreProcessor = Callable[["Matcher", Bot, Event, State], Awaitable[None]]
 """
-:类型: ``Callable[[Matcher, Bot, Event, dict], Awaitable[None]]``
+:类型: ``Callable[[Matcher, Bot, Event, State], Awaitable[None]]``
 
 :说明:
 
   事件响应器运行前预处理函数 RunPreProcessor 类型
 """
-RunPostProcessor = Callable[["Matcher", Optional[Exception], Bot, Event, dict],
+RunPostProcessor = Callable[["Matcher", Optional[Exception], Bot, Event, State],
                             Awaitable[None]]
 """
-:类型: ``Callable[[Matcher, Optional[Exception], Bot, Event, dict], Awaitable[None]]``
+:类型: ``Callable[[Matcher, Optional[Exception], Bot, Event, State], Awaitable[None]]``
 
 :说明:
 
@@ -134,14 +142,6 @@ Matcher = TypeVar("Matcher", bound="MatcherClass")
 
   Matcher 即响应事件的处理类。通过 Rule 判断是否响应事件，运行 Handler。
 """
-MatcherGroup = TypeVar("MatcherGroup", bound="MatcherGroupClass")
-"""
-:类型: ``MatcherGroup``
-
-:说明:
-
-  MatcherGroup 为 Matcher 的集合。可以共享 Handler。
-"""
 Rule = TypeVar("Rule", bound="RuleClass")
 """
 :类型: ``Rule``
@@ -150,9 +150,9 @@ Rule = TypeVar("Rule", bound="RuleClass")
 
   Rule 即判断是否响应事件的处理类。内部存储 RuleChecker ，返回全为 True 则响应事件。
 """
-RuleChecker = Callable[[Bot, Event, dict], Union[bool, Awaitable[bool]]]
+RuleChecker = Callable[[Bot, Event, State], Union[bool, Awaitable[bool]]]
 """
-:类型: ``Callable[[Bot, Event, dict], Union[bool, Awaitable[bool]]]``
+:类型: ``Callable[[Bot, Event, State], Union[bool, Awaitable[bool]]]``
 
 :说明:
 
@@ -174,17 +174,17 @@ PermissionChecker = Callable[[Bot, Event], Union[bool, Awaitable[bool]]]
 
   RuleChecker 即判断是否响应消息的处理函数。
 """
-Handler = Callable[[Bot, Event, dict], Awaitable[None]]
+Handler = Callable[[Bot, Event, State], Awaitable[None]]
 """
-:类型: ``Callable[[Bot, Event, dict], Awaitable[None]]``
+:类型: ``Callable[[Bot, Event, State], Awaitable[None]]``
 
 :说明:
 
   Handler 即事件的处理函数。
 """
-ArgsParser = Callable[[Bot, Event, dict], Awaitable[None]]
+ArgsParser = Callable[[Bot, Event, State], Awaitable[None]]
 """
-:类型: ``Callable[[Bot, Event, dict], Awaitable[None]]``
+:类型: ``Callable[[Bot, Event, State], Awaitable[None]]``
 
 :说明:
 
diff --git a/nonebot/utils.py b/nonebot/utils.py
index 7ef93769..8253d3c7 100644
--- a/nonebot/utils.py
+++ b/nonebot/utils.py
@@ -3,9 +3,10 @@ import json
 import asyncio
 import dataclasses
 from functools import wraps, partial
+from typing import Any, Optional, Callable, Awaitable
 
 from nonebot.log import logger
-from nonebot.typing import Any, Optional, Callable, Awaitable, overrides
+from nonebot.typing import overrides
 
 
 def escape_tag(s: str) -> str: