Dear friends here is the flashing instruction of xiaomi mobile
Download xiaomi(mi) fast-boot firmware from the given linkXiaomi(MI)
Download MI flash.exe
Click on browse option to browse firmware and chose image option.
Now power on your device with fast-boot mood(for the fast-boot mode volume down and power key at the same time)
Connect to the mobile with USB data cable and click on refresh option. You can see your device listed.
Flashing process started wait a min while flashing process complete.
Now flashing process complete and your device is ready to use.
Note :- When you flash your device MI cloud account permanently removed from your device.
Here is the video of Mi4 flashing