Xiaomi: How do I turn on notifications and lock screen notifications in the phone settings?

1. Go to the "Settings" page. Tap "Lock screen" and turn on "Wake Lock screen for notifications".
2. Return to the "Settings" page and tap "Notifications". Tap "Lock screen notifications", and turn on the switch for the Calex Smart App.
3. Return to the "Notifications" page and tap "Floating notifications". Turn on the switch for the Calex Smart App.
4. Return to the "Notifications" page and tap "Notification badges". Turn on the switch for the Calex Smart App.
5. Return to the "Settings" page and tap "Battery & performance". Turn off "Battery saver" and "Ultra battery saver". (When these two switches are turned on, the system will block related notifications.)
6. Return to the "Settings" page and tap "Permissions" under "App Settings". Tap "Autostart" and turn on the switch for the Calex Smart App.
7. Return to the "Permissions" page and tap "App permissions". Tap the Calex Smart App and turn on "Show on lock screen", "Start in background", and "Display pop-up window".