Just a little question there, as the procedure for rooting is quite long and ... you know a bit tricky, i made some research and found people talking about this (https://forum.xda-developers.com/p9/development/twrp-t3565703) a version of twrp for P9 that works for HN8 as they have the same chip (kirin 955) and manage to decrypt the encrypted data etc and with this one it seems you just have to flash supersu for emui5. So i'm here cause i tested it and it worked for me as long as for those who posted it and i was wondering if others would test it and maybe update the initial tutorial with this procedure.