[ZE601KL] Official Marshmallow WW_V21.40.1220.1698 ROOT and TWRP install

P/S: Im sorry if im against this XDA or forums rules. Its my first time to post something. If i done something wrong kindly let me know.

Condition: You have Official Marshmallow WW_V21.40.1220.1698 installed on your ZE601KL

TWRP install:
-go into fastboot mode (shut down your phone. press VOL UP + POWER at the same time until it vibrates and release)
-download and install adb (can get it here i guess. credit to @snoop005 )
-download twrp here (credit to maintainer @LuK1337) and put it in the ADB folder
-in ur pc hold shift + right click and click "open command window here" in ADB folder
-type in "fastboot device" and make sure ur device is detected
-type in "fastboot flash recovery recovery.img" (recovery.img must be the same name with the twrp that u hv downloaded eg:fastboot flash recovery twrp-3.0.2-4-Z00T.img )
-type in "fastboot boot recovery.img" (recovery.img must be the same name with the twrp that u hv downloaded eg:fastboot boot twrp-3.0.2-4-Z00T.img )
-look at ur phone and it should be installed

Root install
-download SuperSU ive tested SuperSU Root BETA v2.67.zip credit to them (help me credit them as i dont know who to tag)
-boot to recovery (shut down your phone. press VOL DOWN + POWER at the same time until it vibrates and release)
-select install and browse for the .zip file location
-wait for the installation done and ure good to go