ZIP archive of 608 KB named for the Lenovo S696, with no indication in the name of what document type it holds. Judging by its size it is likely a schematic or service document rather than a full firmware package, but it should be checked after extraction with Windows Explorer, 7-Zip or WinRAR. If it contains diagrams, they can be used to trace power rails, locate components near a short and find connector pinouts. Compare the board marking printed on the PCB with the documents before relying on them.
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 .zip file
Compressed archive that every operating system opens without extra software.