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The northern boundaries for the Korean Peninsula are commonly (and tacitly) taken to coincide with today's political borders between North Korea and its northern neighbors, China (1,416 km (880 mi) along the provinces of Jilin and Liaoning) and Russia (19 km (12 mi)). These borders are formed naturally by the rivers Yalu/Amnok and Tumen/Tuman/Duman. Taking this definition, the Korean Peninsula (including its islands) has an area of 220,847 km2 (85,270 sq mi).