Chuwi today has posted a new bios update for the 64bit version of the Hi10. Using Google translate, it looks like it fixes issues with MicroSD card class 10 or higher and bios splash screen? I think that might be the screen flicker reported on the first release batch?
Only serial numbers HI10 64G42151105000 or higher should flash it, and I personally I wouldn’t flash this if you don’t have any problems with your Hi10. Remember, if it’s not broken, don’t fix it!
To flash, make a GPT bootable Fat32 pen drive, extract the files to it and then boot to the drive from the bios. It will take care fo the rest. And remember to have at least 70% charge or more. Do this on a flat battery and you risk a brick.
The Chuwi Hi10 Bios download is here:
Hi10 BIOS Fix MicroSD slot and Screen Flashing
Source: Chuwi Forums.