First, it includes the area. In fact, except for the existing parts, the map of the Qing Dynasty is larger than it is now. In this process, it also includes most areas of outer Mongolia, as well as areas related to Russia in the northeast, and there are also many islands. And in this process, we can see that most of the shapes have been finalized, which is not much different from the current shapes, but the area will be larger. But these maps are from the early Qing Dynasty. Later, with the frequent decline and the invasion of western countries, the map became smaller and smaller, and even many areas were divided into other countries.
Second, the changes in the ancient maps of China are actually very obvious. For example, the first unified dynasty, the Qin and Han Dynasties, mainly occupied the Central Plains, while other areas occupied a relatively small area. However, with the change of dynasties, more and more people went to various places to fight, and the territory of China became larger and larger. In fact, the largest territory of China was in the Yuan Dynasty. At that time, people in the Yuan Dynasty were brave and even went to Europe, so the plate area at that time was very large.
Third, maintain territorial integrity. In fact, as long as the country is stable for a period of time, the land area is also stable. At this time, everyone assumed the responsibility of safeguarding national sovereignty and territorial integrity, especially in terms of maps. Even the surrounding islands can't be ignored, so we should draw them in detail. In addition, many businesses or enterprises were fined for losing pictures in the production process. As an ordinary person, it is very important to recognize the territory of the country and safeguard the territorial integrity.