Component distribution diagram for the top side of the Xiaomi Mi 5 mainboard, translated from the Chinese file name, delivered as a 52.3 KB PDF that is probably one page. It maps the physical location of parts so a technician can find a designator taken from the schematic, choose measurement points and spot components near a hot area during short hunting. Pair it with the bottom-side map and the full schematic. No revision is noted, so verify part positions against your phone before working.
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 @mobileschematicshub. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.