Xiaomi archive in zip format, 14.4 MB, labelled for a device called M3; the name carries a copy suffix and no further details about board, revision or contents. Because the model token is ambiguous, open the package and identify the actual device and document type before use. Larger repair archives like this often combine schematic PDFs with layout images or boardview data used to locate parts, trace power rails and find test points. Confirm the mainboard markings match the documentation before measuring or replacing components.
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 @esquematicosparatodos. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.