Zip archive of about 257 KB labelled only with the Lenovo A656 phone model, so its exact contents are not stated in the name. Given the series it sits in, it most likely holds schematic or service material, but open it and check before planning a repair around it. If it is a schematic, use it to trace power rails, charging and display circuits and to locate components and test points. Any zip tool such as 7-Zip extracts it, and verify the board markings on the handset match the documents.
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 @SMART_PHONE_SCHEMATICS. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.