Tsarist Russia was originally a European country and did not border with China. /kloc-In the late 6th century, Russia crossed the Urals and expanded eastward, occupying a large area of Siberia. Then he pointed the finger of aggression at our country. From 1643, the Russian army entered the customs by the Qing army, and successively sent troops across the outer Xing 'an Mountains, rushed into the Heilongjiang River Basin, and seized Yaksa City as a stronghold; He also sent troops across Lake Baikal, invaded eastward and captured Nebuchadnezzar Chu. Wherever the invading army went, it burned, killed and looted, did all kinds of evil, and even ate human flesh humanely. The Qing army and the people of all ethnic groups living in the Heilongjiang River Basin fought back heroically.

The constant harassment of Russian invaders in the Heilongjiang River basin has aroused serious concern of the Qing government. In order to defend the frontier from infringement, Emperor Kangxi decided to take resolute self-defense measures to completely destroy the invading Russian invaders. After emperor Kangxi made full preparations, in 1685, he sent troops to attack the Yugoslav capital fortifications in jaxa by land and water and recovered the city. But when the Qing army retreated, Russia invaded jaxa again. In the second year, Emperor Kangxi sent troops to crusade, besieged jaxa for half a year, cut off the water source in the city, and bombarded it with artillery every day. Almost all the invading troops of more than 800 people were killed, and only 60 people were left in the end. China's struggle against Russian colonialists dealt a blow to Russia's aggressive ambitions.

After the jaxa war, the Russian government saw that its ambition to occupy the Heilongjiang River basin was difficult to succeed, so it was forced to accept the proposal of the Qing government and agreed to sit down and negotiate. During the period of 1689, representatives of China and Russia held equal talks in Nebuchadnezzar Chu. Russia agreed to withdraw the troops that invaded jaxa to its own country; The China government made a major concession and agreed to cede the nomadic Nibuchu area in China to Russia. In this way, China and Russia formally concluded the first border treaty-the Treaty of Nebuchadnezzar Chu.

Except for the Udi River Basin, the treaty clearly demarcates the eastern border between China and Russia, and legally confirms that the vast areas of the Heilongjiang River Basin and the Wusuli River Basin, including Sakhalin Island, are Russian territory.