As with any .rar or .zip file downloaded from third-party sources or community forums, it is strongly advised to scan the file with updated antivirus software before extracting it.
did you download the file from (e.g., a specific forum, file-sharing site)? taiwan-xp11.rar
It is likely designed to enhance the default X-Plane 11 environment with improved terrain, textures, or landmarks for the area [1]. As with any