At present, our territory is basically the foundation laid by the Qing Dynasty, although it has been ceded a lot later, at least the basic disk has not been lost. Of course, in the last years of the Qing Dynasty, because of decay and incompetence, we ceded a lot of land. Among them, the one who has obtained the most land from China is Russia, which has seized a large amount of territory from the northwest and northeast of our country, and the most regrettable thing for us is the Waixing'an Mountains and Sakhalin Island! Where did the Russians go after they got these lands, where did the Chinese on them go?
Many people should have heard the word "breaking into the Kanto", which was a famous population migration in China that occurred in the 19th century, and the people in Shandong, Hebei and other places migrated to the northeast because of natural disasters. Why are so many ordinary people breaking into the Kanto at this time? The reason was that the northeast was the base camp of the Manchu Rulers, and Kangxi ordered that the people of Guannei be forbidden to go to the northeast in order to protect the northeast. In modern times, the Russians constantly invaded the frontiers, and in order to strengthen the control of the frontiers, they relaxed the control, which is also the reason for the influx of a large number of people. Many ordinary people who broke into the Kanto region went deep into the northeast and even reached the Waixing'anling area north of the Heilongjiang River.
In fact, as early as 1689, the Qing Dynasty government signed the Treaty of Nebuchu with Russia, according to which the Xing'an Mountains and the Erguna River outside Russia were used as the dividing line, and the territory south of the demarcation line belonged to China. It is worth mentioning that the Qing Dynasty used "China" for the first time in signing this treaty to indicate its country. At that time, they had been expanding in the Far East, and after the signing of this treaty, their expansion was temporarily curbed.
However, with the decline of the Qing Dynasty, the treaty soon became a dead letter. By the mid-nineteenth century, the Qing Dynasty was in internal and external difficulties, the Anglo-French coalition launched the Second Opium War, and the Taiping Heavenly Kingdom Movement broke out in the south. In 1858, when Russian warships sailed to the Heilongjiang region, the Qing government had to choose to compromise, and the two sides signed the Treaty of Yaohun, and the Qing government was forced to cede to them more than 600,000 square kilometers of land north of the Heilongjiang River, waixing'anling and Sakhalin Island. However, their aggressive pace did not stop, and soon after they forced the Qing Dynasty to cede 400,000 square kilometers of land east of the Ussuri River...
At this time, many Chinese lived in these lands, many of them came to the Kanto Region, and some people lived there for a long time, after all, it was china's territory before! After the Tsarist Russia obtained these lands, it carried out a great purge of the Chinese residents in these lands, many Chinese people were slaughtered, and in the face of the blood type policy of Tsarist Russia, the Chinese people had to move south of the Heilongjiang River. While massacring the Chinese people, Tsarist Russia also immigrated to these areas to ensure that the Russians had absolute superiority, which was also a common tactic used by Russia. Only a small number of Chinese remained in the area, and even if they were not slaughtered, they were eventually assimilated by the Russians who had absolute superiority, and now when they go to Waixing'anling and Sakhalin Island, there is no trace of China at all...