[Miscellaneous Android Development] martyfender:
I need to update the OP with updated instruction to use SuperSu systemless to patch your boot.img instead of my modified boot.imgs:

http://download.chainfire.eu/1220/SuperSU/SR5-SuperSU-v2.82-SR5-20171001224502.zip

Please read the OP on how to be sure you have the proper drivers installed on your connected computer and have adb and fastboot installed on it properly and recognized before even proceeding.

Be sure to copy the SuperSU-v2.82-SR5-20171001224502.zip and the Busybox-1.27.2-YDS-X86.zip to either an external MicroSD card, or to the internal SD card before you start.

Go to settings: about tablet and go to the very bottom and tap the build number 7 times to enable the developer options. You will see the message: you are now a developer.

Go into developer options and select USB debugging and OEM unlocking.

recent info suggest this is all you need to do to unlock your bootloader.

Reboot into the fastboot/bootloader mode where you will see the green Android robot in his side.

Please read the OP (Opening Page) for how to boot to fastboot/bootloader mode.

To temp boot twrp:

fastboot boot Ares8A_recovery_twrp.img

hit enter. The tablet should now boot to the temp twrp. In twrp settings, set the temp time zone and your language. This is only set temporarily. Once twrp is flashed permanently, you will need to set the time zone and language, again.

In twrp backup your stock system, recovery and boot.

Now in twrp select the reboot button and choose bootloader

The tablet should now reboot to bootloader mode.

In bootloader mode, from your connected computer's command prompt, issue:

fastboot format userdata

hit enter, wait to finish

fastboot format cache

hit enter, wait to finish

(Per xda rules you did read my OP and searched, didn't you about what I posted about a backup of data, as the next step will delete all userdata (user created files, etc?)

Next:

fastboot flash recovery Ares8A_recovery_twrp.img

hit enter.

Now use the volume down button to toggle to the recovery option and hit the power button to reboot to the permanent twrp recovery.

Click the install button and choose: SuperSU-v2.82-SR5-20171001224502.zip.

Read the message that it has successfully patched and backed up your original boot.img. Next hit the wipe dalvik and cache button. Go back to the main menu, hit volume down if it won't go back. Hit the install button again, select Busybox-1.27.2-YDS-X86.zip. Read the message that it has succeeded, also. Now choose the reboot button in twrp and choose system.

First boot will take some time, you will see the boot animation for a while, so be patient. Yesterday I saw the boot animation for 7.5 minutes before my V1.1.1 tablet booted to the Android setup screen.

You should now be booted to the Android setup screen where you can set it up.

Once setup, go to settings: about tablet and at the very bottom again enable developer options.

Open the SuperSu app settings, enable pro features, relaunch app. Now in settings again, choose logging, full content, enable su during boot and trust system user.

I usually change display settings, sound and notification settings, security settings and setup my Google account.

Here is a link to a previous post for apps I find useful for my use case:

https://xdaforums.com/showpost.php?p=72995672&postcount=112

Two of the most useful apps I use to increase performance are Kernel Aduitor and Lspeed.

set lspeeds govtuner for performance. With this device, very little is gained with the battery govtuner profile. Battery life is great with the performance profile with less lag.