When we all hear about the Qing Dynasty, we will feel that this is a dynasty that has destroyed the country, the imperial court is decaying, internal and external troubles, and the government is incompetent. During the Time of the Eight-Nation Alliance, Cixi led the Crown Princes to hide in the east, resulting in the loss of a lot of land and the signing of many unequal treaties, but in fact, the Qing Dynasty in the Cixi Era could not represent the rule of the entire Qing Dynasty.
At the time of the establishment of the Qing Dynasty, the Manchus, a nation on horseback, still had great ambitions, and at this time the Manchu Eight Banners Army did not degenerate in combat strength, so they were ambitious to expand their territory to the northeast, northwest, southwest, and southeast, and actively handled government affairs internally, eliminated malpractical policies, and improved productivity. This also made the power of the empire much larger, and the Qing Dynasty did not set up a "Nuer Gandusi" in the remote territory like the previous dynasties, saying that this was its own territory.
During the Ming Dynasty, the territory of the Ming Dynasty included the two capitals and most of the current inland provinces, and the farthest territory reached Yunnan, Guizhou and Fujian, which were completely under the rule of the Ming Dynasty, while in the remote areas and territorial frontier areas, the Ming Dynasty's attitude towards them was more delicate. At that time, in the northeast region, only Liaodong Province was under the control of the Ming Dynasty, while other parts of the northeast were not controlled, according to the records of the "Ming Dynasty Unification Chronicle", the Ming Dynasty's control area in the northeast at that time was probably only the current Liaodong Province, and the Ming Dynasty had no influence in other places.
What's more, the monarchs of the Ming Dynasty at that time did not regard the people of the region as their own people, and in the "Ming Dynasty Unification Chronicle", the Jurchen people in the Liaodong region under the control of the Ming Dynasty government were classified as "foreign Yi" as in Japan. Moreover, some major events in the northeast region at that time, the Ming Dynasty would not pay too much attention. At that time, when Ming Xuanzong was there, someone killed the governor of Liaodong and other people, but Ming Xuanzong at that time said that this was a very common thing in barbarians, so should I use the strength of the whole of China to deal with barbarian affairs? It can be seen from this that the Attitude of the Ming Dynasty towards the Northeast Region is really what it is.
During the Qing Dynasty, the Treaty of Nebuchu enabled the Qing Dynasty to completely expand its territory to the Heilongjiang region, except for the Liaodong region, which would not reset the officials, and set up management officials in the newly acquired territories, which was much stronger than the Ming Dynasty's inaction. During the Qing Dynasty, it not only stationed troops and set up administrative officials in remote areas, but also included the local "foreigners" in the hukou, began to collect taxes, and sent troops to patrol the border. In the face of north Korean and other foreign stowaways or poachers, the Qing Dynasty severely punished them, and even made the King of Korea write a letter of apology, beheaded people crossing the border, and punished North Korean officials, which also stabilized the Qing Dynasty's rule over the border.
During the Ming Dynasty, the territory was not large, and the attitude toward the northeast region was to set up "Nuer Gandusi" to promote their tribute, and did not fulfill their responsibilities in the actual jurisdiction. During the Qing Dynasty, however, the northeast region was really regarded as an administrative region and sent troops to manage and rule, so during the Qing Dynasty, the emperor's measures did include the territory of the northeast province in the territory of China.
If you want to know more interesting history, it is interesting to pay attention to that kind of history.