Swan Castle in OCT, Changjiang Building in OCT, etc. Swan Castle in OCT and Changjiang Mansion in OCT are luxury houses and high-end projects. The high-end series of OCT include OCT Swan Castle and OCT Changjiang Mansion. Swan Castle OCT is located in the core of Qujiang, just one step away from the ruins parks such as Big Wild Goose Pagoda and Furong Garden, and the surrounding traffic is convenient.