Besides the current time of our region, we can add more cities to the world clock on the Xiaomi smartphone.

Note: To remove times, we hold the desired time or city to mark it and tap the delete icon at the bottom.

Android 10 (MIUI 12.0)
Step 1:  Open the  Clock app
Step 2:  Tap on  World clock
Step 3:  Tap on  Add
Step 4:  Select a  city
  1. Open the Clock app
  2. Tap on World clock
  3. Tap on Add
  4. Select a city