Schematic drawings for the Xiaomi Mi 10 smartphone, code name umi, delivered as a ZIP archive of 1.58 MB. Technicians use such sheets to follow supply lines from the battery connector through the PMIC and charger, identify signal names on the board connectors and find test points when diagnosing boot, charging or display faults. The pages usually open in any PDF reader after extraction. Check the mainboard revision printed on the PCB against the document, because values and parts may differ between builds.
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.