Compressed package for the Huawei G9, roughly 5.14 MB as a RAR archive; the name states the model alone and does not list what is included. Typical contents of such Huawei bundles are schematic diagrams or a service guide describing power, charging, display and RF circuits. These help technicians trace signals, identify parts near a fault and find measurement points. Open the archive to confirm what it holds, and make sure the board number on your PCB matches the documents, as variants may differ.
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 @tamirat_moobile. 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.