Huawei Y511 smartphone service material packed in a ZIP archive of 16.1 MB. The name gives only the model, so the exact contents are not stated; at this size it most likely holds schematic pages or a service manual rather than a single image. Technicians use such packs to trace power rails from the PMIC, find charging and display connector signals, and locate test points when chasing a short. Extract it first and confirm the board revision printed on the PCB matches the documents before relying on component references.
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 .zip file
Compressed archive that every operating system opens without extra software.