Heihe: The Chinese Border City That Defines the Nation's Geographic Divide

Countries & Cities · Published 29 September 2026 Swipe more like this →

In short: Perched on the Amur River across from Russia, Heihe is more than a frontier outpost. It marks the northern terminus of the famous Heihe–Tengchong Line, a diagonal boundary that splits China into two distinct demographic halves. From ancient indigenous roots to modern international infrastructure, this city bridges two worlds.

Heihe, historically known as Aigun or Aihui, stands as one of the five oldest cities in Heilongjiang province. Its strategic importance dates back to the mid-1650s when indigenous Ducher people established a town in the Amur Valley. By 1683, the Qing dynasty repurposed the site as a military stronghold against the Russian fort of Albazin. For seven years, Aigun served as the provincial capital before administrative functions shifted to Nenjiang and later Qiqihar.

The city's geopolitical identity was fundamentally altered in 1858 with the signing of the Treaty of Aigun, which ceded the left bank of the Amur River to Czarist Russia. This agreement, followed by the 1860 Treaty of Peking, established the modern Sino-Russian border. Today, Heihe remains a critical point of contact, connected to the Russian city of Blagoveshchensk by a highway bridge completed in 2019 and an HVDC power interconnection station with a 750 MW capacity.

Beyond its historical and diplomatic weight, Heihe serves as a geographic marker for the entire country. It is the starting point of the Heihe–Tengchong Line, a demographic boundary used to divide China into eastern and western regions. The city itself experiences a harsh, monsoon-influenced climate, with January temperatures averaging −22.0 °C. Despite these extremes, it remains a hub for regional transit, linked by rail to Harbin and serving as a gateway to the Wudalianchi volcanic range.

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