Archive named MI 10 youth, 2.45 MB in RAR format, likely tied to the Xiaomi Mi 10 Youth edition, but the name gives no file type, board number or version. Extract it to see whether it holds schematics, a board layout or other service data. Phone service documents of this kind help locate components, follow supply lines from the PMIC and find test points during fault finding. Always match the hardware revision of the board in hand before trusting values or positions.
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 @mischematic. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
7-ZipWinRARThe Unarchiver (macOS)