Android application package, version 4.3.3, whose Chinese name translates roughly as a cat-themed film and video player app. The 7.62 MB APK is ordinary software, not a schematic, boardview or firmware dump, and contains nothing related to motherboard repair. It installs on Android phones, tablets or TV boxes after enabling installation from unknown sources. Treat APK files from unofficial sources with caution, scan them for malware before installing, and do not expect any service data, diagrams or programming images for electronic devices inside this package.
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 @tv_software. Enginerys does not host this file.