Finally, my alife P1 pro has been rooted.
sharing the method
1. Download TWRP and Install (TWRP is Russian version)
I use fastboot method. go "settings" -> "Developer Option" -> "Oem unlock" -> go bootloader -> use fastboot, "fastboot oem unlock" -> "fastboot flash recovery recovery.img" (recovery.img is TWRP)
2. Download Supersu (Y100 ver)
http://www.needrom.com/download/root-wi ... hable-zip/
Y100's Supersu is compatible with P1 Pro.
place your P1 pro, and reboot recovery.
"install Zip from SDCard" -> flash SuperSu.zip
after reboot, you see the Supersu App.