Lahasusu
Lahasusu stands near the meeting of the Songhua and Amur, where broad waterways cross the marshy Sanjiang plain. Its name is said to mean old house in the Hezhen language. Hezhen communities lived along these rivers and the Ussuri, fishing and traveling by water through the country between them. Under the Qing, officials at Sanxing administered the river peoples through local leaders, connecting this far northeastern region with the wider imperial frontier.