diff --git a/docs/.vuepress/config.js b/docs/.vuepress/config.js
index 8faed7a5..e339e2ca 100644
--- a/docs/.vuepress/config.js
+++ b/docs/.vuepress/config.js
@@ -1,6 +1,7 @@
 const path = require("path");
 
 module.exports = context => ({
+  base: process.env.VUEPRESS_BASE || "/",
   title: "NoneBot",
   description: "基于 酷Q 的 Python 异步 QQ 机器人框架",
   markdown: {
@@ -117,12 +118,7 @@ module.exports = context => ({
               title: "进阶",
               collapsable: false,
               sidebar: "auto",
-              children: [
-                "",
-                "scheduler",
-                "permission",
-                "runtime-hook"
-              ]
+              children: ["", "scheduler", "permission", "runtime-hook"]
             }
           ],
           "/api/": [
diff --git a/docs/api/nonebot.md b/docs/api/nonebot.md
index cdb72bdb..68708c95 100644
--- a/docs/api/nonebot.md
+++ b/docs/api/nonebot.md
@@ -49,9 +49,18 @@ sidebarDepth: 0
 * `load_builtin_plugins` => `nonebot.plugin.load_builtin_plugins`
 
 
+* `get_plugin` => `nonebot.plugin.get_plugin`
+
+
 * `get_loaded_plugins` => `nonebot.plugin.get_loaded_plugins`
 
 
+* `export` => `nonebot.plugin.export`
+
+
+* `require` => `nonebot.plugin.require`
+
+
 ## `get_driver()`
 
 
diff --git a/docs/api/plugin.md b/docs/api/plugin.md
index 42cdf84f..5f7a7d46 100644
--- a/docs/api/plugin.md
+++ b/docs/api/plugin.md
@@ -25,6 +25,37 @@ sidebarDepth: 0
 
 
 
+## _class_ `Export`
+
+基类：`dict`
+
+
+* **说明**
+
+    插件导出内容以使得其他插件可以获得。
+
+
+
+* **示例**
+
+
+```python
+nonebot.export().default = "bar"
+
+@nonebot.export()
+def some_function():
+    pass
+
+# this don't work under python 3.9
+# use
+# export = nonebot.export(); @export.sub
+# instead
+@nonebot.export().sub
+def something_else():
+    pass
+```
+
+
 ## _class_ `Plugin`
 
 基类：`object`
@@ -59,6 +90,15 @@ sidebarDepth: 0
 * **说明**: 插件内定义的 `Matcher`
 
 
+### `export`
+
+
+* **类型**: `Export`
+
+
+* **说明**: 插件内定义的导出内容
+
+
 ## `on(type='', rule=None, permission=None, *, handlers=None, temp=False, priority=1, block=False, state=None)`
 
 
@@ -614,12 +654,35 @@ sidebarDepth: 0
 
 
 
+## `get_plugin(name)`
+
+
+* **说明**
+
+    获取当前导入的某个插件。
+
+
+
+* **参数**
+
+    
+    * `name: str`: 插件名，与 `load_plugin` 参数一致。如果为 `load_plugins` 导入的插件，则为文件(夹)名。
+
+
+
+* **返回**
+
+    
+    * `Optional[Plugin]`
+
+
+
 ## `get_loaded_plugins()`
 
 
 * **说明**
 
-    获取当前已导入的插件。
+    获取当前已导入的所有插件。
 
 
 
@@ -627,3 +690,42 @@ sidebarDepth: 0
 
     
     * `Set[Plugin]`
+
+
+
+## `export()`
+
+
+* **说明**
+
+    获取插件的导出内容对象
+
+
+
+* **返回**
+
+    
+    * `Export`
+
+
+
+## `require(name)`
+
+
+* **说明**
+
+    获取一个插件的导出内容
+
+
+
+* **参数**
+
+    
+    * `name: str`: 插件名，与 `load_plugin` 参数一致。如果为 `load_plugins` 导入的插件，则为文件(夹)名。
+
+
+
+* **返回**
+
+    
+    * `Optional[Export]`
diff --git a/nonebot/__init__.py b/nonebot/__init__.py
index c704479e..d642ff44 100644
--- a/nonebot/__init__.py
+++ b/nonebot/__init__.py
@@ -17,7 +17,10 @@
 - ``load_plugin`` => ``nonebot.plugin.load_plugin``
 - ``load_plugins`` => ``nonebot.plugin.load_plugins``
 - ``load_builtin_plugins`` => ``nonebot.plugin.load_builtin_plugins``
+- ``get_plugin`` => ``nonebot.plugin.get_plugin``
 - ``get_loaded_plugins`` => ``nonebot.plugin.get_loaded_plugins``
+- ``export`` => ``nonebot.plugin.export``
+- ``require`` => ``nonebot.plugin.require``
 """
 
 import importlib
@@ -239,4 +242,5 @@ async def _start_scheduler():
 
 from nonebot.plugin import on_message, on_notice, on_request, on_metaevent, CommandGroup
 from nonebot.plugin import on_startswith, on_endswith, on_keyword, on_command, on_regex
-from nonebot.plugin import load_plugin, load_plugins, load_builtin_plugins, get_loaded_plugins
+from nonebot.plugin import load_plugin, load_plugins, load_builtin_plugins
+from nonebot.plugin import export, require, get_plugin, get_loaded_plugins
diff --git a/nonebot/adapters/cqhttp/__init__.py b/nonebot/adapters/cqhttp/__init__.py
index 88b71820..714e9f62 100644
--- a/nonebot/adapters/cqhttp/__init__.py
+++ b/nonebot/adapters/cqhttp/__init__.py
@@ -112,9 +112,17 @@ async def _check_reply(bot: "Bot", event: "Event"):
         return
     msg_seg = event.message[index]
     event.reply = await bot.get_msg(message_id=msg_seg.data["id"])
-    if event.reply["sender"]["user_id"] == event.self_id:
+    # ensure string comparation
+    if str(event.reply["sender"]["user_id"]) == str(event.self_id):
         event.to_me = True
     del event.message[index]
+    if len(event.message) > index and event.message[index].type == "at":
+        del event.message[index]
+    if len(event.message) > index and event.message[index].type == "text":
+        event.message[index].data["text"] = event.message[index].data[
+            "text"].lstrip()
+        if not event.message[index].data["text"]:
+            del event.message[index]
     if not event.message:
         event.message.append(MessageSegment.text(""))
 
@@ -142,14 +150,14 @@ def _check_at_me(bot: "Bot", event: "Event"):
         if event.message[0] == at_me_seg:
             event.to_me = True
             del event.message[0]
-            if event.message[0].type == "text":
+            if event.message and event.message[0].type == "text":
                 event.message[0].data["text"] = event.message[0].data[
                     "text"].lstrip()
                 if not event.message[0].data["text"]:
                     del event.message[0]
-            if event.message[0] == at_me_seg:
+            if event.message and event.message[0] == at_me_seg:
                 del event.message[0]
-                if event.message[0].type == "text":
+                if event.message and event.message[0].type == "text":
                     event.message[0].data["text"] = event.message[0].data[
                         "text"].lstrip()
                     if not event.message[0].data["text"]:
diff --git a/nonebot/message.py b/nonebot/message.py
index 90af9a96..1b102633 100644
--- a/nonebot/message.py
+++ b/nonebot/message.py
@@ -92,8 +92,9 @@ async def _check_matcher(priority: int, bot: Bot, event: Event,
     async def _check(Matcher: Type[Matcher], bot: Bot, event: Event,
                      state: dict) -> Optional[Type[Matcher]]:
         try:
-            if await Matcher.check_perm(
-                    bot, event) and await Matcher.check_rule(bot, event, state):
+            if (not Matcher.expire_time or datetime.now() <= Matcher.expire_time
+               ) and await Matcher.check_perm(
+                   bot, event) and await Matcher.check_rule(bot, event, state):
                 return Matcher
         except Exception as e:
             logger.opt(colors=True, exception=e).error(
@@ -149,6 +150,8 @@ async def _run_matcher(Matcher: Type[Matcher], bot: Bot, event: Event,
     try:
         logger.debug(f"Running matcher {matcher}")
         await matcher.run(bot, event, state)
+    except StopPropagation as e:
+        exception = e
     except Exception as e:
         logger.opt(colors=True, exception=e).error(
             f"<r><bg #f8bbd0>Running matcher {matcher} failed.</bg #f8bbd0></r>"
@@ -166,7 +169,7 @@ async def _run_matcher(Matcher: Type[Matcher], bot: Bot, event: Event,
                 "<r><bg #f8bbd0>Error when running RunPostProcessors</bg #f8bbd0></r>"
             )
 
-    if matcher.block:
+    if matcher.block or isinstance(exception, StopPropagation):
         raise StopPropagation
 
 
diff --git a/nonebot/plugin.py b/nonebot/plugin.py
index 32be4dbc..f063726c 100644
--- a/nonebot/plugin.py
+++ b/nonebot/plugin.py
@@ -11,6 +11,7 @@ import pkgutil
 import importlib
 from dataclasses import dataclass
 from importlib._bootstrap import _load
+from contextvars import Context, ContextVar, copy_context
 
 from nonebot.log import logger
 from nonebot.matcher import Matcher
@@ -25,7 +26,49 @@ plugins: Dict[str, "Plugin"] = {}
 :说明: 已加载的插件
 """
 
-_tmp_matchers: Set[Type[Matcher]] = set()
+_tmp_matchers: ContextVar[Set[Type[Matcher]]] = ContextVar("_tmp_matchers")
+_export: ContextVar["Export"] = ContextVar("_export")
+
+
+class Export(dict):
+    """
+    :说明:
+      插件导出内容以使得其他插件可以获得。
+    :示例:
+
+    .. code-block:: python
+
+        nonebot.export().default = "bar"
+
+        @nonebot.export()
+        def some_function():
+            pass
+
+        # this don't work under python 3.9
+        # use
+        # export = nonebot.export(); @export.sub
+        # instead
+        @nonebot.export().sub
+        def something_else():
+            pass
+    """
+
+    def __call__(self, func, **kwargs):
+        self[func.__name__] = func
+        self.update(kwargs)
+        return func
+
+    def __setitem__(self, key, value):
+        super().__setitem__(key,
+                            Export(value) if isinstance(value, dict) else value)
+
+    def __setattr__(self, name, value):
+        self[name] = Export(value) if isinstance(value, dict) else value
+
+    def __getattr__(self, name):
+        if name not in self:
+            self[name] = Export()
+        return self[name]
 
 
 @dataclass(eq=False)
@@ -46,6 +89,11 @@ class Plugin(object):
     - **类型**: ``Set[Type[Matcher]]``
     - **说明**: 插件内定义的 ``Matcher``
     """
+    export: Export
+    """
+    - **类型**: ``Export``
+    - **说明**: 插件内定义的导出内容
+    """
 
 
 def on(type: str = "",
@@ -80,7 +128,7 @@ def on(type: str = "",
                           block=block,
                           handlers=handlers,
                           default_state=state)
-    _tmp_matchers.add(matcher)
+    _tmp_matchers.get().add(matcher)
     return matcher
 
 
@@ -112,7 +160,7 @@ def on_metaevent(rule: Optional[Union[Rule, RuleChecker]] = None,
                           block=block,
                           handlers=handlers,
                           default_state=state)
-    _tmp_matchers.add(matcher)
+    _tmp_matchers.get().add(matcher)
     return matcher
 
 
@@ -146,7 +194,7 @@ def on_message(rule: Optional[Union[Rule, RuleChecker]] = None,
                           block=block,
                           handlers=handlers,
                           default_state=state)
-    _tmp_matchers.add(matcher)
+    _tmp_matchers.get().add(matcher)
     return matcher
 
 
@@ -178,7 +226,7 @@ def on_notice(rule: Optional[Union[Rule, RuleChecker]] = None,
                           block=block,
                           handlers=handlers,
                           default_state=state)
-    _tmp_matchers.add(matcher)
+    _tmp_matchers.get().add(matcher)
     return matcher
 
 
@@ -210,7 +258,7 @@ def on_request(rule: Optional[Union[Rule, RuleChecker]] = None,
                           block=block,
                           handlers=handlers,
                           default_state=state)
-    _tmp_matchers.add(matcher)
+    _tmp_matchers.get().add(matcher)
     return matcher
 
 
@@ -387,27 +435,35 @@ def load_plugin(module_path: str) -> Optional[Plugin]:
     :返回:
       - ``Optional[Plugin]``
     """
-    try:
-        _tmp_matchers.clear()
-        if module_path in plugins:
-            return plugins[module_path]
-        elif module_path in sys.modules:
-            logger.warning(
-                f"Module {module_path} has been loaded by other plugins! Ignored"
+
+    def _load_plugin(module_path: str) -> Optional[Plugin]:
+        try:
+            _tmp_matchers.set(set())
+            _export.set(Export())
+            if module_path in plugins:
+                return plugins[module_path]
+            elif module_path in sys.modules:
+                logger.warning(
+                    f"Module {module_path} has been loaded by other plugins! Ignored"
+                )
+                return
+            module = importlib.import_module(module_path)
+            for m in _tmp_matchers.get():
+                m.module = module_path
+            plugin = Plugin(module_path, module, _tmp_matchers.get(),
+                            _export.get())
+            plugins[module_path] = plugin
+            logger.opt(
+                colors=True).info(f'Succeeded to import "<y>{module_path}</y>"')
+            return plugin
+        except Exception as e:
+            logger.opt(colors=True, exception=e).error(
+                f'<r><bg #f8bbd0>Failed to import "{module_path}"</bg #f8bbd0></r>'
             )
-            return
-        module = importlib.import_module(module_path)
-        for m in _tmp_matchers:
-            m.module = module_path
-        plugin = Plugin(module_path, module, _tmp_matchers.copy())
-        plugins[module_path] = plugin
-        logger.opt(
-            colors=True).info(f'Succeeded to import "<y>{module_path}</y>"')
-        return plugin
-    except Exception as e:
-        logger.opt(colors=True, exception=e).error(
-            f'<r><bg #f8bbd0>Failed to import "{module_path}"</bg #f8bbd0></r>')
-        return None
+            return None
+
+    context: Context = copy_context()
+    return context.run(_load_plugin, module_path)
 
 
 def load_plugins(*plugin_dir: str) -> Set[Plugin]:
@@ -419,33 +475,42 @@ def load_plugins(*plugin_dir: str) -> Set[Plugin]:
     :返回:
       - ``Set[Plugin]``
     """
-    loaded_plugins = set()
-    for module_info in pkgutil.iter_modules(plugin_dir):
-        _tmp_matchers.clear()
+
+    def _load_plugin(module_info) -> Optional[Plugin]:
+        _tmp_matchers.set(set())
+        _export.set(Export())
         name = module_info.name
         if name.startswith("_"):
-            continue
+            return
 
         spec = module_info.module_finder.find_spec(name, None)
         if spec.name in plugins:
-            continue
+            return
         elif spec.name in sys.modules:
             logger.warning(
                 f"Module {spec.name} has been loaded by other plugin! Ignored")
-            continue
+            return
 
         try:
             module = _load(spec)
 
-            for m in _tmp_matchers:
+            for m in _tmp_matchers.get():
                 m.module = name
-            plugin = Plugin(name, module, _tmp_matchers.copy())
+            plugin = Plugin(name, module, _tmp_matchers.get(), _export.get())
             plugins[name] = plugin
-            loaded_plugins.add(plugin)
             logger.opt(colors=True).info(f'Succeeded to import "<y>{name}</y>"')
+            return plugin
         except Exception as e:
             logger.opt(colors=True, exception=e).error(
                 f'<r><bg #f8bbd0>Failed to import "{name}"</bg #f8bbd0></r>')
+            return None
+
+    loaded_plugins = set()
+    for module_info in pkgutil.iter_modules(plugin_dir):
+        context: Context = copy_context()
+        result = context.run(_load_plugin, module_info)
+        if result:
+            loaded_plugins.add(result)
     return loaded_plugins
 
 
@@ -459,11 +524,46 @@ def load_builtin_plugins() -> Optional[Plugin]:
     return load_plugin("nonebot.plugins.base")
 
 
+def get_plugin(name: str) -> Optional[Plugin]:
+    """
+    :说明:
+      获取当前导入的某个插件。
+    :参数:
+      * ``name: str``: 插件名，与 ``load_plugin`` 参数一致。如果为 ``load_plugins`` 导入的插件，则为文件(夹)名。
+    :返回:
+      - ``Optional[Plugin]``
+    """
+    return plugins.get(name)
+
+
 def get_loaded_plugins() -> Set[Plugin]:
     """
     :说明:
-      获取当前已导入的插件。
+      获取当前已导入的所有插件。
     :返回:
       - ``Set[Plugin]``
     """
     return set(plugins.values())
+
+
+def export() -> Export:
+    """
+    :说明:
+      获取插件的导出内容对象
+    :返回:
+      - ``Export``
+    """
+    return _export.get()
+
+
+def require(name: str) -> Optional[Export]:
+    """
+    :说明:
+      获取一个插件的导出内容
+    :参数:
+      * ``name: str``: 插件名，与 ``load_plugin`` 参数一致。如果为 ``load_plugins`` 导入的插件，则为文件(夹)名。
+    :返回:
+      - ``Optional[Export]``
+    """
+    plugin = get_plugin(name)
+    return plugin.export if plugin else None
diff --git a/nonebot/plugin.pyi b/nonebot/plugin.pyi
index 6cf93b97..37d775d6 100644
--- a/nonebot/plugin.pyi
+++ b/nonebot/plugin.pyi
@@ -1,17 +1,32 @@
 import re
+from contextvars import ContextVar
 
 from nonebot.typing import Rule, Matcher, Handler, Permission, RuleChecker
 from nonebot.typing import Set, List, Dict, Type, Tuple, Union, Optional, ModuleType
 
 plugins: Dict[str, "Plugin"] = ...
 
-_tmp_matchers: Set[Type[Matcher]] = ...
+_tmp_matchers: ContextVar[Set[Type[Matcher]]] = ...
+_export: ContextVar["Export"] = ...
+
+
+class Export(dict):
+
+    def __call__(self, func, **kwargs):
+        ...
+
+    def __setattr__(self, name, value):
+        ...
+
+    def __getattr__(self, name):
+        ...
 
 
 class Plugin(object):
     name: str
     module: ModuleType
     matcher: Set[Type[Matcher]]
+    export: Export
 
 
 def on(type: str = ...,
@@ -141,10 +156,22 @@ def load_builtin_plugins():
     ...
 
 
+def get_plugin(name: str) -> Optional[Plugin]:
+    ...
+
+
 def get_loaded_plugins() -> Set[Plugin]:
     ...
 
 
+def export() -> Export:
+    ...
+
+
+def require(name: str) -> Export:
+    ...
+
+
 class CommandGroup:
 
     def __init__(self,
diff --git a/pages/changelog.md b/pages/changelog.md
index ef8bad8f..859be509 100644
--- a/pages/changelog.md
+++ b/pages/changelog.md
@@ -4,6 +4,14 @@ sidebar: auto
 
 # 更新日志
 
+## v2.0.0a7
+
+- 修复 cqhttp 检查 to me 时出现 IndexError
+- 修复已失效的事件响应器仍会运行一次的 bug
+- 修改 cqhttp 检查 reply 时未去除后续 at 以及空格
+- 添加 get_plugin 获取插件函数
+- 添加插件 export, require 方法
+
 ## v2.0.0a6
 
 - 修复 block 失效问题 (hotfix)
diff --git a/tests/bot.py b/tests/bot.py
index 7a294564..68a4e399 100644
--- a/tests/bot.py
+++ b/tests/bot.py
@@ -22,6 +22,8 @@ nonebot.load_builtin_plugins()
 # load local plugins
 nonebot.load_plugins("test_plugins")
 
+print(nonebot.require("test_export"))
+
 # modify some config / config depends on loaded configs
 config = nonebot.get_driver().config
 config.custom_config3 = config.custom_config1
diff --git a/tests/test_plugins/test_export.py b/tests/test_plugins/test_export.py
new file mode 100644
index 00000000..ec549571
--- /dev/null
+++ b/tests/test_plugins/test_export.py
@@ -0,0 +1,15 @@
+import nonebot
+
+export = nonebot.export()
+export.foo = "bar"
+export["bar"] = "foo"
+
+
+@export
+def a():
+    pass
+
+
+@export.sub
+def b():
+    pass