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Abstract: The aim of the study is to analyze conceptual models of joint economic development of the Russian Far East (RFE) with the Northeast China, as well as the dynamics of Russian-Chinese trade relations in these regions. The main characteristics of conceptual models of RFE and Northeast China interactions are defined: Natural Economic Territory; Japan Sea integration ring; Integration Border Zone; Resource Transit; Industrial and Service Arcs. It is shown that in recent years, regions of Northeast China, especially Heilongjiang Province, have accumulated imports of Russian raw materials and increased exports to the Russian market, opening up opportunities for the development of cross-border trade. Under the conditions of large-scale sanctions against the Russian economy, China’s share in the RFE’s foreign trade has become dominant, and the importance of the southern RFE regions as a "contact" zone for Russia’s interaction with the Chinese economy has increased significantly.