RAR archive of 904 KB for the Xiaomi Mi 8 smartphone, with no indication in the name of what it holds. It may contain schematic pages, a component layout, firmware fragments or service notes, so extract and examine it first. For phone board repair, layout and schematic files help locate PMIC rails, test points and connectors when diagnosing no-power or charging faults. Make sure any document matches the exact model and board version, since Xiaomi variants differ in layout.
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 @esquemaseletricos. 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.