evidence: Heihe (Chinese: 黑河; pinyin: Hēihé; "Black River") is a prefecture-level city of northern Heilongjiang province, People's Republic of China, located on the Russian border, on the south bank of the Amur River, across the river from Blagoveshchensk. Heihe has an urban population of about 211,313, while the total population of the prefecture-level city is 1,673,893. Heihe marks the northeast terminus of the Heihe–Tengchong Line, which is sometimes used to divide China into east and west. [...] Jiamusi (Manchu: Giyamusi, Chinese: 佳木斯; pinyin: Jiāmùsī; formerly Kiamusze) is a prefecture-level city in eastern Heilongjiang province, People's Republic of China. Located along the middle and lower reaches of the Songhua River, it faces Russia's Khabarovsk Krai across the Ussuri River and the Amur River. In 2007 Jiamusi had a GDP of RMB 34.1 billion with a 14.3% growth rate. Its population was 2,552,097 at the 2010 census whom 881,711 lived in the built up area made of 4 urban districts.