Please Help me, I can't recover to original Windows 10 OS

I using Chuwi Hi10 Air, But I install wrong Windows 10 OS and I can’t recover to original Windows 10 Home OS. Please help me. Thanks.

(Chuwi Hi10 AirQ64G19100XXX)
(I have downloaded BIOS file and flash, it says " ‘efi…’ is not recognized as an internal or external command, operable program, or batch file") can anyone fix this? Thanks.

You don’t need to flash bios, just install original windows.

Chuwi Hi10 Air Windows :

Oh, can you show me how to install this original Windows 10 Home, thanks.

Here is tutorial

Okay, thanks for sharing this file.