diff --git a/bot/linkai/link_ai_bot.py b/bot/linkai/link_ai_bot.py
index 6815eca..65cfe4a 100644
--- a/bot/linkai/link_ai_bot.py
+++ b/bot/linkai/link_ai_bot.py
@@ -370,12 +370,9 @@ class LinkAISessionManager(SessionManager):
 
 class LinkAISession(ChatGPTSession):
     def calc_tokens(self):
-        try:
-            cur_tokens = super().calc_tokens()
-        except Exception as e:
-            logger.debug("Exception when counting tokens precisely for query: {}".format(e))
-            cur_tokens = len(str(self.messages))
-        return cur_tokens
+        if not self.messages:
+            return 0
+        return len(str(self.messages))
 
     def discard_exceeding(self, max_tokens, cur_tokens=None):
         cur_tokens = self.calc_tokens()
diff --git a/channel/chat_channel.py b/channel/chat_channel.py
index c664435..ba017af 100644
--- a/channel/chat_channel.py
+++ b/channel/chat_channel.py
@@ -184,8 +184,6 @@ class ChatChannel(Channel):
         reply = e_context["reply"]
         if not e_context.is_pass():
             logger.debug("[WX] ready to handle context: type={}, content={}".format(context.type, context.content))
-            if e_context.is_break():
-                context["generate_breaked_by"] = e_context["breaked_by"]
             if context.type == ContextType.TEXT or context.type == ContextType.IMAGE_CREATE:  # 文字和图片消息
                 context["channel"] = e_context["channel"]
                 reply = super().build_reply_content(context.content, context)
diff --git a/plugins/hello/hello.py b/plugins/hello/hello.py
index dcc248f..007df6d 100644
--- a/plugins/hello/hello.py
+++ b/plugins/hello/hello.py
@@ -22,6 +22,7 @@ class Hello(Plugin):
         super().__init__()
         self.handlers[Event.ON_HANDLE_CONTEXT] = self.on_handle_context
         logger.info("[Hello] inited")
+        self.config = super().load_config()
 
     def on_handle_context(self, e_context: EventContext):
         if e_context["context"].type not in [
@@ -30,7 +31,8 @@ class Hello(Plugin):
             ContextType.PATPAT,
         ]:
             return
-
+        if not self.config or not self.config.get("use_character_desc"):
+            e_context["context"]["generate_breaked_by"] = EventAction.BREAK
         if e_context["context"].type == ContextType.JOIN_GROUP:
             if "group_welcome_msg" in conf():
                 reply = Reply()
diff --git a/plugins/linkai/midjourney.py b/plugins/linkai/midjourney.py
index 76395bd..9c6c57b 100644
--- a/plugins/linkai/midjourney.py
+++ b/plugins/linkai/midjourney.py
@@ -88,6 +88,8 @@ class MJBot:
         context = e_context['context']
         if context.type == ContextType.TEXT:
             cmd_list = context.content.split(maxsplit=1)
+            if not cmd_list:
+                return None
             if cmd_list[0].lower() == f"{trigger_prefix}mj":
                 return TaskType.GENERATE
             elif cmd_list[0].lower() == f"{trigger_prefix}mju":