diff --git a/konabot/plugins/simple_notify/ask_llm.py b/konabot/plugins/simple_notify/ask_llm.py
index 7c80689..601c4a3 100644
--- a/konabot/plugins/simple_notify/ask_llm.py
+++ b/konabot/plugins/simple_notify/ask_llm.py
@@ -49,6 +49,9 @@ SYSTEM_PROMPT = """你是一个专门解析提醒请求的助手。请分析用
 用户："5分钟前提醒我关火"
 输出：{"datetime": null, "datetime_delta": "PT5M", "datetime_delta_minus": true, "content": "关火", "is_notice": true}
 
+用户："五百年后提醒我关火"
+输出：{"datetime": null, "datetime_delta": "P500Y", "datetime_delta_minus": false, "content": "关火", "is_notice": true}
+
 用户："昨天提醒我关火"
 输出：{"datetime": null, "datetime_delta": "P1D", "datetime_delta_minus": true, "content": "关火", "is_notice": true}