Because in the Qing dynasty, because the ability of the Qing dynasty was too weak to resist the attacks of those western powers, many valuable resources were carved up, including Sakhalin Island. The island was occupied by the Japanese in World War II and then taken away by the Russians. The territory of the early Qing dynasty was very large, especially during the Kangxi period, and the national strength of the whole Qing dynasty was very strong. However, by the end of the Qing Dynasty, the rule of the Qing government was very corrupt, and the monarch began to adopt a closed-door policy. This policy gradually derailed the Qing dynasty from the world, thus falling behind the world. It was not until the western powers captured the door of the Qing government with those advanced weapons that the Qing government realized that it had fallen behind the world, but at that time it was impossible to save this situation. Lagging behind will be beaten, so at that time, the Qing government was a piece of fat meat in the eyes of those western powers, and everyone wanted to share certain interests in China, so the Qing government began to sign various treaties that humiliated the country. The last period of the Qing government can be said to be the darkest period in the whole history of China, and it is also the eternal pain of many people in China.

When the Qing government signed these treaties, it also ceded some land to these western powers. At that time, the Qing government cut Sakhalin Island to Russia. At first, the Qing government didn't seem to notice how many resources were hidden in these islands, so Russia picked up a big bargain. Russia saw the value of this island at that time. The geographical position of this island is very superior, and it contains a lot of oil and natural gas resources.

To know that the value of these oil and gas resources is enormous, the Qing government gave these resource-rich islands to Russia because of its backwardness and ignorance at that time. You know, in 2003, the amount of oil dug by workers on this island has reached 7 billion tons, which is equivalent to Daqing Oilfield in China. It can be found that this island actually has great oil and gas value.