Here is the TWRP recovery & ROOT guide for Lenovo P70-A & P70-T
All needed files are in the download links below
1-Turn Off Your Phone
2-Connect your Phone While Turned Off
3-Download and Install Lenovo SP Drivers
3-Extract the Scatter file and the recovery image from the rar files and put them in the same folder
4-Open SP Flash tool and choose the scatter file which specific to your phone model
5-Unplug your phone and press on Download in the SP Flash tool and replug your phone again
6-Wait till you see a green message telling you that the procedure was a sucess
Rooting for those who wishes to root their phones
1-Turn Off your Phone
2-Download SuperSU-v2.49.zip and put it on your internal storage in your phone
3-Press on VOL+ & Power till you get a scren with 3 Options
4-Choose recovery using the VOL+ key and VOL- to confirm
5-Press on Install in recovery and choose the SuperSU-v2.49.zip file from your internal storage
6-Enjoy.