Bi-City Biennale of Urbanism\Architecture(Shenzhen) | 311 followers on LinkedIn. Bi-City Biennale of Urbanism\Architecture (UABB) is currently the only biennial exhibition in the world to be based exclusively on the set themes of URBANISM AND URBANIZATION. Coorganized by the two neighboring and closely interacting cities of Shenzhen and Hong Kong, UABB situates itself within the regional context of the rapidly urbanizing Pearl River Delta, concerns itself with globally common urban issues, extensively communicates and interacts with the wider public, is presented using expressions of contemporary visual culture, and engages international, avant-garde dimensions as well as discourses of public interest. Bi-City Biennale of Urbanism\Architecture (UABB) is currently the only biennial exhibition in the world to be based exclusively on the set themes of URBANISM AND URBANIZATION.