I used this tool to root n flash the TWRP recovery into my Mi4i...backup the IMEI then start flashing the EU update from here...
The link for the tool : http://forum.xda-developers.com/mi-4i/development/tool-mi-toolkit-v4-root-twrp-stock-t3170607
Flashing:
1) boot to recovery
2) nandroid...