diff --git a/src/wechat_decrypt_tool/routers/chat.py b/src/wechat_decrypt_tool/routers/chat.py
index b79d96a..0ee597a 100644
--- a/src/wechat_decrypt_tool/routers/chat.py
+++ b/src/wechat_decrypt_tool/routers/chat.py
@@ -3851,8 +3851,7 @@ def _collect_chat_messages(
                     render_type = "system"
                     template = _extract_xml_tag_text(raw_text, "template")
                     if template:
-                        import re
-
+                        # import re
                         pat_usernames.update({m.group(1) for m in re.finditer(r"\$\{([^}]+)\}", template) if m.group(1)})
                         content_text = "[拍一拍]"
                     else:
@@ -3992,8 +3991,7 @@ def _collect_chat_messages(
                 elif local_type == 50:
                     render_type = "voip"
                     try:
-                        import re
-
+                        # import re
                         block = raw_text
                         m_voip = re.search(
                             r"(<VoIPBubbleMsg[^>]*>.*?</VoIPBubbleMsg>)",
@@ -4750,7 +4748,7 @@ def list_chat_messages(
                     render_type = "system"
                     template = _extract_xml_tag_text(raw_text, "template")
                     if template:
-                        import re
+                        # import re
 
                         pat_usernames.update({m.group(1) for m in re.finditer(r"\$\{([^}]+)\}", template) if m.group(1)})
                         content_text = "[拍一拍]"
@@ -4882,7 +4880,7 @@ def list_chat_messages(
                 elif local_type == 50:
                     render_type = "voip"
                     try:
-                        import re
+                        # import re
 
                         block = raw_text
                         m_voip = re.search(
@@ -5231,7 +5229,7 @@ def list_chat_messages(
 
                     if existing_local:
                         try:
-                            import re
+                            # import re
                             cur = str(m.get("emojiUrl") or "")
                             if cur and re.match(r"^https?://", cur, flags=re.I) and ("/api/chat/media/emoji" not in cur):
                                 m["emojiRemoteUrl"] = cur