Cailan is not well known for anything in particular, except being known for the border between the core worlds and the fledgling colonial worlds of the Ming sub-sector. Cailan was once known to be the system with the heaviest concentration of military forces, though it has now been trumped by the Eridani system.
The Cailan system has no viable colonial worlds, and lackluster resources in both its asteroid fields and on its barren planets. The only thing of note except the naval base and scout base is the relative abnormal behaviour of its star, which has interested researchers.
To the general populace, the system only serves as a jumping point into the Ming sub-sector on the trailing end of the Sol sub-sector.