Circuit schematic in PDF form for the Xiaomi Redmi 3Z and Redmi Note 3 smartphones, with the file name written in Chinese. It lays out the main board circuitry, so a technician can follow power rails from the PMIC, check charging and battery paths, and trace signals to connectors, display and camera interfaces. Any PDF reader opens it, and text search helps locate reference designators quickly. Phone boards differ between regional variants, so compare the markings on your board with the drawing before relying on it.
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.