This method works 100%
First download Elephone P8000 CWM Recovery + Scatter file from here
Download the latest version of SuperSu.zip from here
Copy SuperSu.zip to your SDcard
Download SP Flash tool Latest version from here
Download and install USB VCOM drivers from here
Launch SP flash Tool
Click on Scatter_Loading
Load the scatter file from the CWM Recovery package
Click Download and connect the device to the PC
Device will be detected and CWM recovery will be flashed to the device. (Takes about 5 seconds)
When you see Tick in Green circle, the flashing process is complete.
Disconnect the phone from PC
Now boot the phone into recovery menu holding Volume up + Power Button for about 3 seconds
You might see three small text in white. (Fastboot, Recovery and Normal)
Use volume down to navigate and volume up to select Recovery.
The phone will now display CWM Recovery Menu.
Select install zip
Navigate to you SDcard and select the SuperSu.zip
Wait for the process to complete. (Takes about 3 seconds)
Reboot the phone.
You can use apps like Root checker to check if the phone is properly rooted