How does Xiaomi set the desktop countdown?

Xiaomi mobile phone can't display the countdown on the desktop and lock screen for the time being, but it can be set in the mobile phone calendar. First open the mobile calendar, and then click "+"to create a new schedule. After making text comments on the information, click the countdown tab on the far right, and then set the start and end reminder time to complete the countdown setting. Or you can use cloud notes on your mobile phone, or you can set up multiple countdown reminders.