Aigun, or Aihui town, historic town of China in northern Manchuria, in Aihui District
Aigun (Saghalian Oula), was the main Qing town on the Amur.
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During the last expedition of 1858, Muravyov concluded the Treaty of Aigun with the Qing official
In 1909, the Qing Dynasty planned a railway from Jinzhou to Qiqihar to Aihui, which includes a segment that coincides with the Qibei Line.