diff --git a/src/elf/grafana_cli.py b/src/elf/grafana_cli.py
index e74b247..230716f 100644
--- a/src/elf/grafana_cli.py
+++ b/src/elf/grafana_cli.py
@@ -24,9 +24,7 @@ def contains_chinese(text: str) -> bool:
     """Check if text contains Chinese characters."""
     if not isinstance(text, str):
         return False
-    # Unicode ranges for Chinese characters
-    chinese_pattern = re.compile(r'[\u4e00-\u9fff\u3400-\u4dbf\u20000-\u2a6df\u2a700-\u2b73f\u2b740-\u2b81f\u2b820-\u2ceaf\uf900-\ufaff\u3300-\u33ff\ufe30-\ufe4f\uf900-\ufaff\u2f800-\u2fa1f]')
-    return bool(chinese_pattern.search(text))
+    return text != text.encode('ascii', 'ignore').decode('ascii')
 
 async def mutate_chinese_titles(data: Dict[str, Any]) -> None:
     """Recursively translate Chinese titles to English."""