1. Unlock Bootloader
Download official unlock tool here : https://en.miui.com/unlock/
2. Download the newest ROM and extract boot.img
Download the full ROM here: http://c.mi.com/oc/miuidownload/index
(ROM for Chinese model:http://www.miui.com/download-365.html)
3. Install Magisk Manager, the...
Global rom is more lightweight, if it has DC dimming, I will prefer it than Chinese ROM. Chinese rom have too much nubia services, and it push ad notification automatically. And battery life is poor than global rom (Need further test)