Xiaomi Mi Notebook Air BIOS packed as a 4.58 MB RAR, with 17805 in the name, possibly a build or version number. No board number or screen size variant is given, so identify your exact model and board before flashing. Images like this are written to the SPI flash with an external programmer to revive a machine that will not post after a failed update. Read and keep the original chip contents before writing, and confirm that the extracted image matches the capacity of the flash chip on your board.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @biosarchive. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →