First part, labelled (1), of a K30 PRO collection in a 7z archive of roughly 373 KB, with no brand recorded in the data. The model name lines up with the Redmi K30 Pro, but the contents are not described, so open it with 7-Zip to see whether it is a schematic extract, diagram or reference sheet. Keep it together with part (2), since the two probably complement each other. Such material helps locate parts, follow supply lines and find shorts, once the PCB revision has been confirmed.
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 @esquematicosdecelulares. Enginerys does not host this file.
How to open a .7z file
High-ratio compressed archive, often used for large BIOS collections.