Yes Me
First you need this files :
TWRP Flash file
SuperSu Zip Flushable (i used SuperSU-v2.82-201705271822.zip)
no verify encrypt.zip
Download TWRP and No verify encrypt files here :
TWRP For C9 PRO
Copy SuperSu and No verify encrypt files in your Sdcard
then follow steps :
backup Data
enable oem unlock and usb debugging
reboot downloading
flash TWRP suitable c9 pro
after flashing done immediately press VOL up , Home,power
if you do right you see blue text (recovery) then TWRP recovery screen
format data
install supersu zip
install no verify encrypt
reboot system
first reboot can take 5~7 minutes.
enjoy your rooted c9 pro