Ruan was located on the Koros Trunk Line, between Kaikielius and Coruscant.
It was one of 18 planets controlled by the Salliche Agricultural Corporation. The majority of Ruan's surface was farmland tended to as closely as a park, and kept as neat. Besides its favorable axial tilt and soil quality, Ruan's farming output was maximized by climate control, selective terraforming and crop engineering, and the use of labor droids.
Ruan was originally a vassal colony of Kaikielius, but had achieved full Republic membership by 11,000 BBY.
During the Yuuzhan Vong War, Ruan was one of the few worlds to accept refugees. In fact, Salliche Ag took extensive measures to dispose of machines and essentially prepare the world for the invaders. Many refugees fled there, only to live in squalor. Most were employed as harvesters, substituting to the deactivated labor droids. This situation eventually led to a droid uprising.