The earliest known Russian estimate (1859) gives the population of Qing subjects in the "Trans-Zeya District" as 3,000, without breakdown by ethnicity; the next one (1870) gives it as 10,646, including 5,400 Han, 4,500 Manchus and 1,000 Daurs. The estimates published between the late 1870s and early 1890s varied between 12,000 and 16,000, peaking in 1894, at 16,102 (including 9,119 Han Chinese, 5,783 Manchus, and 1,200 Daurs).
The earliest Russian estimate from 1859 indicates a population of 3,000 Qing subjects in the "Trans-Zeya District," without ethnic breakdown; the next one from 1870 shows 10,646, including 5,400 Han, 4,500 Manchus and 1,000 Daurs. Estimates between the late 1870s and early 1890s varied from 12,000 to 16,000, peaking at 16,102 in 1894 (including 9,119 Han Chinese, 5,783 Manchus, and 1,200 Daurs).