Schematic for the Xiaomi Mi 8 Lite, code name platina, packed in a 2.57 MB RAR archive. The circuit diagram, usually supplied as a PDF, shows the power distribution, connectors and main signal routes of the phone. Technicians rely on it to trace rails from the power management IC, track down a shorted capacitor, and identify test points for voltage checks. No board revision is given in the name, so compare the board markings on the handset with the drawing, and note that other Mi 8 models use different boards.
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 @mischematic. 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.