diff --git a/doc/README_EN.md b/doc/README_EN.md
index eefd15e..2607f16 100644
--- a/doc/README_EN.md
+++ b/doc/README_EN.md
@@ -28,6 +28,7 @@
 *   Notification system (e.g., login reminders, anomaly alerts)
 *   Audit logs for comprehensive recording of user behavior and system changes
 *   Lightweight Node.js-based backend with low resource consumption
+*   Built-in heartbeat keep-alive mechanism to ensure stable connections
 
 
 ## 📸 Screenshots