This solution ↑ still works today(2022/2/14) but I would like to describe in more detail for those who first flash mi 8 se EU rom
For POINT 1 Above:sirius_images_V11.0.3.0.PEBCNXM_20190926.0000.00_9.0_cn_bc09b23ef4 can be downoad here :
https://mifirm.net/model/sirius.ttt#cn
For POINT 2 Above:TWRP 3.2.3-1227 can be download here:
https://mifirm.net/model/sirius.ttt#twrp
For POINT 3 Above: type " fastboot boot
twrp.img" through adb command (Change
twrp.img to your own twrp filename ,
here the TWRP version is 3.2.3-1227) . After booting twrp ,click “swipe” and
just do format /data,Do not swipe to factory Reset or advanced wipe.
For POINT 8 Above:after configure everything,
Double check that developer mode and USB debugging are turned on
For POINT 9 Above:TWRP 3.2.3-1217 can be download here:
https://mifirm.net/model/sirius.ttt#twrp (
notice POINT 9 and POINT2 are using different version of twrp )
For POINT 10 Above:after flash TWRP 3.2.3-1217,your phone should still be in fastboot this point. you need to type " fastboot boot
twrp.img" through adb command (Change
twrp.img to your own twrp filename,
here the TWRP version is 3.2.3-1217) , and then you can boot into recovery.
For POINT 10-12 Above:
never do those !!! :【 format /data or swipe to factory Reset or advanced wipe.】
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After reboot into the system.
check your phone sensors first . That's because I found all my sensors not work after completing the above steps, including Accelerometer, Gyroscope, Magnetometer...
The easiest way to check is to see if the Compass app on your phone is working . if not working. Then you are in the same situation as me
1 . You should goto the following website to download Chinese rom :
https://www.miui.com/shuaji-393.html use "ctrl+F" in your browser search "小米手机8SE" click to download the rom (Please check if the ROM file suffix is '.tgz'. If it is '.gz', please rename it to '.tgz'). The reason is that there is no global version of rom for mi8 se, and we
just need the "persist.img" file in the rom ,So the Chinese rom is okay too.
2 . Then decompress Chinese rom , you will see a "images" folder,copy the "persist.img" file in "images" folder . paste it into your phone internal storage
3 . Double check that developer mode and USB debugging are turned on.
4 . Flash TWRP 3.3.0-0423, you can download from
https://mifirm.net/model/sirius.ttt#twrp
5 . type " fastboot boot
twrp.img" through adb command (Change
twrp.img to your own twrp filename,here the TWRP version is 3.3.0-0423) , and then you can boot into recovery.
6 .
never do those !!! :【 format /data or swipe to factory Reset or advanced delete.】 ,just click install and Then click on the bottom right "install image" flash into the image , Find the location where you stored "persist.img" before, select "Persist" partition and swipe in, then reboot the system. You will find that all the sensors are restored
Enjoy! (整整花了我两天时间刷欧版的rom 累死)