The social and economic space of today’s Russia borderline territory is a kind of testing ground where economic processes are most evident. The break-up of the 1990s Soviet socio-cultural space led to the formation of a new post-imperial space. At the current stage of social development, the country’s actual, rather than nominal, integrity depends on the correlation of regional socio-political, economic, and cultural structures which the Soviet Union’s integrity used to be based on. To maintain Russia’s real integrity, it is necessary to study continuous factors determining regional specifics. The article discusses the perception of the borderline and intercultural dialog caused by the borderline in the context of economic cooperation. Transborder dialog in two regions of the country is analyzed: the dialog between St.Petersburg with its intercultural experience and self-identity of "Russia’s second capital city" and Finland; as well as the dialog between Khaborovsky Krai as a sample of a "flow-through culture" on a "developing territory" with an insignificant "pre-Soviet" past in its interaction with China.