What is the geographical location of Sakhalin Island? Why did China lose Sakhalin Island?

Sakhalin Island is located in the northeast of Eurasia, covering an area of 76,000 square kilometers. This used to be the territory of China. According to relevant historical records, Sakhalin Island was known in the Jin Dynasty. Unfortunately, Sakhalin Island, because of its narrow geographical location, belongs to a bitter and cold place, so there was no relevant policy to rule it from the Yuan Dynasty to the Ming Dynasty, and it was finally included in the Russian territory.

In fact, although sakhalin island is located in a bitter and cold place, it has its unique strategic significance. It is located in the southeast of the estuary of Heilongjiang in China, with tatar strait in the west and Hokkaido across the sea in the south. In addition, its natural resources are also very rich. Because it is an island, aquatic resources are naturally quite rich. However, such a treasure island was ceded out by the Qing Dynasty.

Due to the incompetence of the late Qing Dynasty, a lot of land in China was divided up by western powers. In the late World War II, the United States, Britain and the Soviet Union reached an agreement. After the war, countries unanimously agreed to return the Japanese-occupied land in China to China. However, for their own interests, the former Soviet Union broke the contract and occupied Sakhalin Island in China, which was truly owned by Russia, mainly because of the treaty signed between the Qing Dynasty and Russia. 19th century, Russian Empire

These unequal treaties are just one of the unequal treaties that China was forced to sign with the great powers in modern history. During the periods of 1905 and 19 18 to 1925, Japan once ruled the whole of Sakhalin Island. 1945, the former Soviet Union launched the August storm and seized Sakhalin Island.