Why did the Russians invade the Northeast?

The Russian czar government established Yakutsk overseers' jurisdiction and further pursued the policy of foreign expansion. The following year, Yakutsk warlord Golovin sent Bakhtiyarov to lead 70 Cossacks on an expedition to Heilongjiang, but they turned back halfway.

1643, Yakutsk overseer Paiboyakov and 132 Cossacks explored Heilongjiang again. They arrived in Gyeonggi Province in the winter of, which was the first Russian to invade the northeast of China. These gangsters are burning, killing and looting in China.

If the Russians hadn't occupied Outer Manchuria, the Qing government wouldn't have cancelled the "ban" policy in Northeast China, and then the Han people wouldn't have migrated to the north of Liaodong Peninsula. Jilin and Heilongjiang will be empty and vast no-man's land.

The northeast of China is less developed than other regions, so Russia wants to occupy the northeast because the northeast is close to Russia and Russia wants a bigger territory, so there is no reason to go to war in the northeast.

When the Russians burned, killed and looted in the northeast of China, the northeast was hit hard, resulting in immature parts of the northeast.