Heihe

Heihe is a prefecture-level city situated in northern Heilongjiang province, China. Located on the south bank of the Amur River, the city lies directly across the border from Blagoveshchensk in Russia.

At the end of 2024, the resident population of Heihe reached 1.23 million people, which included 823,000 residents living in urban areas and 407,000 residents living in rural areas. Earlier data from the 2020 census recorded a total prefecture-level population of 1,286,401, with 223,832 people residing within the built-up area of Aihui District. Geographically, Heihe marks the northeast terminus of the diagonal Heihe–Tengchong Line. The jurisdictional area of the city spans 54,390 square kilometers.

Heihe is a prefecture-level city in northern Heilongjiang province, China, situated on the southern bank of the Amur River opposite the Russian city of Blagoveshchensk. The built-up urban core within Aihui District holds a population of 223,832 residents, while the wider jurisdictional territory spans 54,390 square kilometers.

Northern riverbanks

The landscape is defined by the Amur River, which establishes the international border with Russia following the historical 1858 Aigun Treaty and 1860 Treaty of Peking. Domestically, the jurisdictional territory borders Da Hinggan Ling Prefecture to the north, Yichun to the southeast, Suihua to the south, Qiqihar to the southwest, and Hulunbuir in Inner Mongolia to the west. This northern terrain serves as the northeast terminus of the diagonal Heihe–Tengchong Line.

Continental winters

The regional climate is classified as monsoon-influenced humid continental, experiencing long, bitterly cold, windy, and dry winters shaped by the Siberian high. Conversely, summers bring warm and wet conditions driven by the East Asian monsoon. Across the broader administrative geography, local conditions shift from Dwb classifications toward Dwa patterns further south.