Small zip of about 1 MB named Qingdao-Int, which most likely refers to a platform or board code name, but the name gives no brand, model or board number. Treat it as an unidentified archive and inspect the contents before relying on it. Code names like this often appear in schematic titles, so comparing internal documents against the board silkscreen helps confirm a match. If firmware is inside, back up the original flash chip with a programmer and confirm the image size fits the chip before writing anything.
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 @BiosSchematicWorld. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.