diff --git a/src/chat/focus_chat/heartflow_prompt_builder.py b/src/chat/focus_chat/heartflow_prompt_builder.py
index b238c7492..a1c401e48 100644
--- a/src/chat/focus_chat/heartflow_prompt_builder.py
+++ b/src/chat/focus_chat/heartflow_prompt_builder.py
@@ -5,7 +5,7 @@ from src.chat.utils.prompt_builder import Prompt, global_prompt_manager
 from src.chat.utils.chat_message_builder import build_readable_messages, get_raw_msg_before_timestamp_with_chat
 from src.chat.person_info.relationship_manager import relationship_manager
 import time
-from typing import  Optional
+from typing import Optional
 from src.chat.utils.utils import get_recent_group_speaker
 from src.manager.mood_manager import mood_manager
 from src.chat.memory_system.Hippocampus import HippocampusManager
@@ -258,6 +258,7 @@ class PromptBuilder:
         # --- End choosing template ---
 
         return prompt
+
     async def get_prompt_info(self, message: str, threshold: float):
         related_info = ""
         start_time = time.time()