Xiaomi Mi 9 SE archive, code name grus, packed as a 992 KB ZIP file with no document type or board revision in its name. Given the size, schematic or layout pages are more likely than a firmware image, but the contents should be confirmed after extraction. Service diagrams for this phone help when tracing power distribution from the PMIC, checking the charging circuit, reading display and flex connector pinouts, and finding the component behind a short. Make sure the board markings match, since the Mi 9 SE is a different board from the Mi 9.
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 @esquematicosparatodos. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.