1858和1860年，沙皇俄国通过《瑷珲条约》和《北京条约》割占了中国外兴安岭以南、黑龙江以北和乌苏里江以东100多万平方公里的土地。至此，西起贝加尔湖、东至太平洋萨哈林诸岛、南起黑龙江和乌苏里江沿岸、北到北冰洋广亵的俄国远东地区疆界最终形成。面对新占领的地区，沙皇 In 1858 and 1860, tsarist Russia seized more than one million square kilometers of land to the south of the Anning Mountains, north of Heilongjiang and the Ussuri River through the Treaty of Babel and the Treaty of Beijing. So far, from the Baikal Lake in the west, to the Pacific island Sakhalin islands in the east, the Heilongjiang River and the Ussuri River in the south, and the border to Russia’s Far East to the north in the Arctic Ocean finally formed. In the face of newly occupied areas, the tsar