Combined logic block diagram and main board component distribution map for the Xiaomi Redmi 3Z and Redmi Note 3, with a Chinese title, in a 1.64 MB PDF. The block section gives an overview of power and signal paths, and the layout pages show where parts sit on the PCB for finding components and test points. Open it in any PDF viewer. Redmi Note 3 boards came in different chipset versions, so confirm your phone's board matches the drawing before trusting designators.
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.