RAR archive of 2.32 MB for the Huawei Honor Play. The file name identifies just the phone, leaving the contents unstated; expect schematics, service documentation or layout pages and confirm by opening it with 7-Zip or WinRAR. Such files help a technician trace power rails, check the charging path and USB circuitry, follow display lines and pinpoint components on a shorted rail. Make sure the model code and board revision printed on the handset match the documents before trusting part values or positions.
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.