Android APK titled with Chinese words meaning watch TV, version 1.0.3, about 9.56 MB. It appears to be a streaming or live-television client for Android set-top boxes and smart TVs rather than service material for hardware repair. It can be sideloaded through a file manager or ADB once installation from unknown sources is allowed. Check compatibility with the target Android version and verify the package with an antivirus scan before installing, since unofficial builds may be altered.
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.