Complex sentence: From 1860 to 1884, lots of Russians came to Hulun Buir panning for gold, and in 1900, Russian troops entered China, destroyed several sentries, before 1907 there were already 1000 households of Russian settlers in Ergun Right Banner.
Split into simpler sentences: From 1860 to 1884, lots of Russians came to Hulun Buir panning for gold, and in 1900, Russian troops entered China, destroyed several sentries. By 1907 there were already 1,000 households of Russian settlers in Ergun Right Banner.