If you already have unlocked the bootloader then boot to bootloader and flash TWRP:
fastboot flash recovery twrp.img
and reboot to recovery by holding VOLUME UP + POWER
or just boot TWRP without flashing it:
fastboot boot twrp.img
but where do i find the /system file?
Full ROM here: https://mega.nz/#!zVxl0agI!UrcTWf9LfDZV-9xLCdgTu85RKTYnaeNZSSgOJX7FwXM
---------- Post added at 02:35 ---------- Previous post was at 02:25 ----------
check his commits regarding the "twrp: ...
If you know the link of stock rom kindly provide here .
Where can I get the AOSP 8 GO ROM to download?
Hi, I did post the link for that in the other thread - AOSP 8 GO ROM is the stock ROM.
There are generic GSI's available for AOSP8.1 and AOSP9 at https://github.com/phhusson/treble_experimentations/...
So, to be clear the one that have been listed on your given link (Miui's website) are actually Android Stock Rom and not Miui, right?
Correct, they are non Miui, Xiaomi Android Go 8.1 stock.