What are the reasons for the emergence of logistics fever in China at the beginning of the 12th century?

The p>12th century belongs to the end of Song Dynasty and the beginning of Yuan Dynasty. With the Mongolian army going south to fight against the north and killing the west in the east, the territory of Dayuan Dynasty established by Mongolia gradually expanded.

It reaches Mongolia and Siberia in the north, the South China Sea in the south, Tibet and Yunnan in the southwest, eastern Xinjiang in the northwest, and Xing 'an Mountains and the Sea of Okhotsk in the northeast, with a total area of about 12 million square kilometers. Political unity has laid a foundation for exchanges, immigration and migration across the country. In order to consolidate the rule of the whole country, the Yuan government carried out a large number of political immigrants, including those from Yunnan and Tibet, Heilongjiang in Northeast China and Songnen Plain, and Mongolian desert in North China. Moreover, the Yuan Dynasty also strengthened the establishment and jurisdiction of transportation and official post stations, which objectively promoted the emergence of logistics fever, and the encouragement of economy and business culture promoted the emergence of logistics fever. In short, at the beginning of the 12th century, the emergence of logistics fever in China was the result of the comprehensive effects of all aspects, which could not be explained from one face to face. He is a phenomenon inevitably brought about by the development of social politics, economy, culture and commerce to a certain extent.