Why did the Qing dynasty prohibit Han Chinese from entering the northeast?

"Going to the East" took place in the late Qing Dynasty. Before that, most parts of Northeast China were often used by the Qing Dynasty to exile prisoners because of the cold climate. For example, Ningguta, a famous exile in Qing Dynasty, is located in Ning 'an area of Mudanjiang today.

On the other hand, it is because the Qing Dynasty originated in the northeast, especially the Changbai Mountain generation. Manchu rulers regard Changbai Mountain as the birthplace, and do not allow a large number of Han Chinese to enter the customs, let alone get close to Changbai Mountain.

It is precisely for this reason that before the end of the Qing Dynasty, the northeast was actually in a state of extremely sparse population.

However, by the end of the Qing Dynasty, with the collapse of the Qing government's rule, the policy of banning the Northeast gradually failed. At that time, Shandong, Henan and other places suffered from natural and man-made disasters for years, and the people's lives were difficult. So a wave of immigrants to the northeast began to flourish gradually, forming a later trip to the east.