During the Southern Song Dynasty, the developed Central Plains fell because of internal troubles and foreign invasion, and half of the south of the Yangtze River was preserved. The rise of Mongolia and the prairie, the submission of the Southern Song Dynasty to the Jin Dynasty, the rise of Dali in the southwest, and the local governors in the northwest were all worried about the Southern Song Dynasty. However, the rulers of the Southern Song Dynasty were content with half the country and unwilling to recapture the lost country. Very sad. The Southern Song Dynasty is the weakest dynasty in China's history, but its economy and culture are very developed. It is indeed a kind of sorrow!
The territory of the Yuan Dynasty is also the largest country in human history, spanning Eurasia. In addition to the mainland, there are four big countries around. Although they obey the central dynasty, they are fragmented. At that time, the westernmost part of Mongolia reached the Rhine River in the th century, which is now Germany. Strictly speaking, it was not created by the Han people. In which era, Mongolia and Han were not one family. Anyone who has studied history knows that Mongolians divide people into four classes. Therefore, the anti-Mongolian hero of that era was still a national hero. If the Chinese nation had such aggression, it would never have been trampled by the Japanese and savage Europeans in modern history. Before the Qing Dynasty, Europeans could be trampled flat, but history played a big joke on China people!
Map of the Early Qing Dynasty This is the map of the middle and late Qing Dynasty, when the territory of China was the largest. The northeast and north, including Kuye Island, are divided into Russia. This is because Taiwan Province Province was ceded to Japan, and Korea was a Japanese colony. Soon after, most of the northwest was cut to Russia. After the founding of People's Republic of China (PRC), Outer Mongolia broke away from China with the support of the Soviet Union. By this time, China lost nearly one third of its territory, laying the basic shape of the modern territory of China. XJ declared its independence with the secret support of Russia. Southwest Vietnam is a French colony, and it is worried about the three southwestern provinces of China. ZJ and Qinghai in Ningxia are also secretly preparing for independence with the support of Britain. Hunan left troops to suppress the northwest and southwest, but for this Hunan, southwest and northwest will be independent, and Sichuan and Shaanxi will be the borders of China. It is possible to counterattack Vietnam in Guangxi, and the China People's Liberation Army will attack the Indian army in Sichuan. History will not forget, for the sake of national territorial integrity.