Looking for proper BIOS for Chuwi Hi8 Pro 64bit

I have tried to flash my Chuwi HI8 Pro with the BIOS which is supposed to solve my SD card issues. I must have botched it as I bricked my tablet - it does not start at all. I found a nice guide on how to reflash my BIOS via external EPROM programmer tool but I need to identify the proper BIOS first. Could you provide me the right BIOS, please? The serial ID of my tablet is: PQ32G22170900052
Thanks in advance for your help!

Zoltan K.

Please contact with service@chuwi.com

Admin i need file bios dualboot for hi8bpro seri 1511xxxx xxxx>2000 thanks