Sixty-Four Villages East of the River

The Sixty-Four Villages East of the River were a group of Manchu, Daur and Han-inhabited villages located on the left (north) bank of the Amur River (Heilong Jiang) opposite of Heihe, and on the east bank of Zeya River opposite of Blagoveshchensk. The area totaled 3,600 square kilometers (1,400 mi2).

Source: Wikipedia — Sixty-Four Villages East of the River (CC BY-SA 4.0)