diff --git a/talkingq-url/banban/service/im.py b/talkingq-url/banban/service/im.py
index 72cf2da..fa69068 100644
--- a/talkingq-url/banban/service/im.py
+++ b/talkingq-url/banban/service/im.py
@@ -4,11 +4,11 @@ import json
 from collections.abc import Mapping
 from pathlib import Path
 from typing import Any
-
+from services.offline_audio_cache import offline_audio_cache
 from fastapi import HTTPException
 from services.database_service_base import DatabaseServiceBase
 from banban.service.message_audio_storage import MessageAudioStorageService, MessageAudioStorageError
-
+from banban.service.binding import BindingService
 try:
     from banban.dao.im import ImDAO, DeviceIdentity, ConversationMessageCreateResult
     from banban.schemas.im import (
@@ -19,6 +19,9 @@ try:
 except ModuleNotFoundError:
     from banban.dao.im import ImDAO, DeviceIdentity, ConversationMessageCreateResult
     from banban.schemas.im import ChildConversationMessageItem, DeviceMessageCreateRequest, ParentChildMessageCreateRequest
+from handlers.audio_file_handler import message_audio_storage_service
+from utils.logger import session_logger
+
 
 
 PARENT_PARTICIPANT_TYPE = 1
@@ -286,6 +289,14 @@ class ImService(DatabaseServiceBase):
                 child_id=child_id,
                 payload=payload,
             )
+            binding_service = BindingService()
+            device = await binding_service.get_current_binding(parent_user_id)
+            try:
+                audio_url = await message_audio_storage_service.get_audio_url(stored_audio.file_key)
+            except Exception:
+                session_logger.error(device.device_id, "audio", f"failed to get audio url: {stored_audio.file_key}", exc_info=True)
+                audio_url = stored_audio.file_key
+            await offline_audio_cache.add_audio_url(device.device_id, f"{audio_url}")
         except Exception:
             try:
                 await self.audio_storage.delete_audio(stored_audio.file_key)
diff --git a/talkingq-url/handlers/mqtt_handler.py b/talkingq-url/handlers/mqtt_handler.py
index 1726cd7..d7e0e30 100644
--- a/talkingq-url/handlers/mqtt_handler.py
+++ b/talkingq-url/handlers/mqtt_handler.py
@@ -344,7 +344,7 @@ class TalkingQMQTTService:
                 "status": "success",
                 "type": 0,
                 "params": {
-                    "url": "http://101.35.224.118:8080/assets/audio/parent_online_zh.mp3"
+                    "url": f"http://{settings.server_host}:{settings.server_port}/assets/audio/parent_online_zh.mp3"
                 },
             }
             await self._publish(f"device/{device_id}/event_resp", response_payload)
@@ -371,7 +371,7 @@ class TalkingQMQTTService:
                         "status": "success",
                         "type": 0,
                         "params": {
-                            "url": "http://101.35.224.118:8080/assets/audio/parent_online_zh.mp3"
+                            "url": f"http://{settings.server_host}:{settings.server_port}/assets/audio/parent_online_zh.mp3"
                         },
                     },
                 )
diff --git a/talkingq-url/handlers/websocket_message_handler.py b/talkingq-url/handlers/websocket_message_handler.py
index 4454776..4030538 100644
--- a/talkingq-url/handlers/websocket_message_handler.py
+++ b/talkingq-url/handlers/websocket_message_handler.py
@@ -19,7 +19,6 @@ from handlers.prompt_sound_handler import handle_prompt_sound_request
 from handlers.session_cleanup_handler import handle_old_session_cleanup
 from config import settings
 from banban.service.im import im_service as im_conversation_service
-from handlers.audio_file_handler import message_audio_storage_service, save_audio_file
 from fastapi import HTTPException
 
 async def handle_websocket_messages(websocket: WebSocket, device_id: str, serial_number: str):