RAR archive of 9.22 MB labelled A5000 and tagged with the Lenovo brand, most likely service material for the Lenovo A5000 phone, although the name does not list the contents. Archives of this kind usually hold schematics, PCB layout images or a service manual in PDF form. Unpack it and check what is inside before relying on it, and compare the board marking on the phone mainboard with the documents, because one model name can cover several hardware revisions with different component placement and power circuits.
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.