HiPad Pro bricked after update

[dfz0r]

I had this error described here

How to update L1 certification for HiPad Pro?

The upgrade teaching video: Here is the operating sequence: [lADPBG1Q80VYRDbNDCDNCYE_2433_3104] Perform the following steps: Step 1: Turn on the tablet, connect WiFi, then click the “Wireless Update” app. Step 2: Click the " Check for update" button. Step 3: Click ‘download’. Step 4: Choose ‘Factory data reset’. ( a: Click the volume button’+'and ‘-’ to make option; b: click the power button to confirm selection; c: the tablet will reboot automatically after factory data r…