diff --git a/konabot/common/longtask.py b/konabot/common/longtask.py
index abc83c2..b64e2e8 100644
--- a/konabot/common/longtask.py
+++ b/konabot/common/longtask.py
@@ -25,6 +25,7 @@ from pydantic import BaseModel, ValidationError
 from .path import DATA_PATH
 
 LONGTASK_DATA_DIR = DATA_PATH / "longtasks.json"
+QQ_PRIVATE_CHAT_CHANNEL_PREFIX = "_CHANNEL_QQ_PRIVATE_"
 
 
 class LongTaskTarget(BaseModel):
@@ -65,7 +66,7 @@ class LongTaskTarget(BaseModel):
                     } BOT_CLASS={bot.__class__.__name__}"
                 )
                 return False
-            if self.channel_id == "":
+            if self.channel_id.startswith(QQ_PRIVATE_CHAT_CHANNEL_PREFIX):
                 # 私聊模式
                 await bot.send_private_msg(
                     user_id=int(self.target_id),
@@ -196,7 +197,7 @@ async def get_long_task_target(event: BaseEvent, bot: BaseBot) -> LongTaskTarget
         return LongTaskTarget(
             platform="qq",
             self_id=str(event.self_id),
-            channel_id="",
+            channel_id=f"{QQ_PRIVATE_CHAT_CHANNEL_PREFIX}{event.self_id}",
             target_id=str(event.user_id),
         )
     if isinstance(event, ConsoleMessageEvent):