Small RAR archive of around 512 KB labelled for the Huawei P9 smartphone. The name gives no detail about what is inside, so extract it and check whether it is a schematic, a layout, a service guide or something else. Such files support tracing supply rails, identifying connector pinouts and finding components and test points during power or charging diagnosis. Given the modest size, it may contain only part of the documentation, so confirm it covers the area you need and matches your board revision.
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 @cyberlanelectonik. 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.