Chongqing is located in the southwest of China's inland. It is the economic, financial, technological innovation, shipping and commercial logistics center in the upper reaches of the Yangtze River, a national logistics hub, an important strategic fulcrum for the development of the western region, the "Belt and Road" and the Yangtze River Economic Belt Important connection points and inland open highlands, beautiful places with beautiful mountains and clear waters; It is not only famous for river cities, fog cities, and bridges, but also famous for mountain cities. Chongqing is dominated by the Han nationality, and the main ethnic minorities include the Tujia and Miao nationalities. There are rich tourism resources, including the Three Gorges of the Yangtze River, the World Cultural Heritage Dazu Rock Carvings, the World Natural Heritage Wulong Karst and Nanchuan Jinfo Mountain. Chongqing is the largest industrial and commercial city in Southwest China, an important modern manufacturing base in the country. There are 10 national key laboratories, 10 national engineering technology research centers, 68 universities, China (Chongqing) Pilot Free Trade Zone, China-Singapore (Chongqing) Strategic Interconnection Demonstration Projects, Liangjiang New District, Yuxin-Europe International Railway, Western (Chongqing) Science City and other strategic projects.