diff --git a/src/plugins/PFC/conversation.py b/src/plugins/PFC/conversation.py
index ad9b5281..97f429ff 100644
--- a/src/plugins/PFC/conversation.py
+++ b/src/plugins/PFC/conversation.py
@@ -248,7 +248,7 @@ class Conversation:
                 self.observation_info.last_message_content = last_msg.get("processed_plain_text", "")
 
                 # 构建用于 Prompt 的历史记录字符串 (只使用最近的一部分)
-                history_slice_for_str = initial_messages[-20:]  # 可配置
+                history_slice_for_str = initial_messages[-30:]  # 可配置
                 self.observation_info.chat_history_str = await build_readable_messages(
                     history_slice_for_str,
                     replace_bot_name=True,
diff --git a/src/plugins/PFC/observation_info.py b/src/plugins/PFC/observation_info.py
index 102730b4..4f480c42 100644
--- a/src/plugins/PFC/observation_info.py
+++ b/src/plugins/PFC/observation_info.py
@@ -345,7 +345,7 @@ class ObservationInfo:
             self.chat_history = self.chat_history[-max_history_len:]
 
         # 更新历史记录字符串 (仅使用最近一部分生成，提高效率)
-        history_slice_for_str = self.chat_history[-20:]  # 例如最近 20 条
+        history_slice_for_str = self.chat_history[-30:]  # 例如最近 20 条
         try:
             self.chat_history_str = await build_readable_messages(
                 history_slice_for_str,