Honor 8 Lite archive from Huawei, RAR format, 1.17 MB. The name carries no model code, board number or description of the files, so open it with 7-Zip or WinRAR and inspect the contents first. Documentation of this size is usually a schematic or service guide, helpful for tracing power rails from the PMIC, following charging and USB lines and locating components near a short. The 8 Lite exists in several regional variants, so confirm the model code on your unit matches the one shown in 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 @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.