Why doesn't Xiaomi mobile phone display the solution?

1, because I didn't open the information reminder in the notification bar in the mobile phone permission, and I need to reset it in the settings.

2, mobile phone settings-personal and security-notification center. Check whether the switch displayed in the notification bar is turned on.

3. Mobile phone settings-Application-Display notification-Check whether the display notification has been cancelled.

4. Go to Settings-Personal and Security-and decide whether to join the pure background.

5. Display is allowed in Settings-Notification and Status Bar-Notification Management. If you need a floating window, you need to open it in Security Center-Rights Management and close it by default.