diff --git a/app/controller/add_knowledge_route.py b/app/controller/add_knowledge_route.py
index 759ae21..3e5fcc4 100644
--- a/app/controller/add_knowledge_route.py
+++ b/app/controller/add_knowledge_route.py
@@ -34,7 +34,7 @@ def add_knowledge_route(app):
       yield f'data: {json.dumps({"type": "retrieve", "data": json.dumps(search_response.model_dump())}, ensure_ascii=False)}\n\n'
 
       async for chunk in chain.astream([
-        SystemMessage(content=f"""你需要根据如下内容来回答用户的问题：{search_response.answer}"""),
+        SystemMessage(content=f"""你需要根据如下内容来回答用户的问题：{search_response.answer}，如果内容为'在提供的资料中未找到相关信息'，你需要根据你自己的知识来回答用户问题"""),
         HumanMessage(content=param.question)
       ]):
         yield f'data: {json.dumps({"type": "messages", "data": chunk}, ensure_ascii=False)}\n\n'