Component placement map for the bottom side of the Xiaomi Mi 5 mainboard; the Chinese name translates to Xiaomi 5 bottom component distribution diagram. At only 55.6 KB the PDF probably holds a single page. It shows where parts sit so a technician can physically locate capacitors, coils, ICs and test points referenced in the schematic. Use it with the matching top-side map and the Mi 5 schematic. No board revision is given, so check the positions against your actual PCB before removing parts.
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.