RAR archive labelled BOTTOM for the Compal board LA-G871P, most likely a bottom-side layout or placement view of the PCB. The LA- prefix with a P suffix is Compal's standard motherboard numbering, used across many laptop brands built by that ODM. A bottom-side view helps locate components, test points and connectors on the underside when chasing a short or a missing rail. Check that the board number and revision silkscreened on your PCB match before trusting the part positions shown in the file.
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 @SCHEMATICWORLD. 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.