diff --git a/routes/chat.py b/routes/chat.py
index 60135e0..bc901ee 100644
--- a/routes/chat.py
+++ b/routes/chat.py
@@ -471,7 +471,7 @@ async def create_agent_and_generate_response(
         preamble_text = await call_preamble_llm(chat_history, query_text, get_preamble_text(language), language, model_name, api_key, model_server)
         # 只有当preamble_text不为空且不为"<empty>"时才添加到消息列表
         if preamble_text and preamble_text.strip() and preamble_text != "<empty>":
-            pre_message_list.append({"role": "assistant","content": preamble_text})
+            pre_message_list.append({"role": "assistant","content": preamble_text+"\n"})
             logger.info(f"Stream mode: Generated preamble text ({len(preamble_text)} chars)")
         else:
             logger.info("Stream mode: Skipped empty preamble text")