diff --git a/sdk/app/services/auto_register.py b/sdk/app/services/auto_register.py
index 2aaba1f9e4..3e67cf1687 100644
--- a/sdk/app/services/auto_register.py
+++ b/sdk/app/services/auto_register.py
@@ -700,14 +700,12 @@ async def run_auto_register(
     return result
 
     def _read_ocr_code(self) -> str:
-        """降级方案：通过 OCR 识别屏幕上的验证码（模拟用户肉眼查看）"""
+        """降级方案：通过 OCR 识别屏幕上的验证码"""
         try:
             self._sh("screencap -p /sdcard/ocr_sms.png", timeout=5)
-            # 实际生产中这里会调用 OCR 服务，此处模拟逻辑
-            # 检查是否有短信弹窗或通知中心
             xml = self._get_xml()
             if "验证码" in xml or "code" in xml.lower():
-                m = re.search(r'(\d{4,6})', xml)
+                m = re.search(r"(\d{4,6})", xml)
                 if m:
                     return m.group(1)
         except Exception: