What are the main characteristics and positive effects of the provincial system?

The system of provincial administration in Yuan Dynasty has the following characteristics: first, the dual nature of provincial administration, which is not only the dispatched agency of the imperial court, but also the highest administrative agency of the local government, which is conducive to strengthening the ties between the central and local governments and consolidating national unity and ethnic integration; Second, the provincial system is not only conducive to the central government's expropriation, but also leaves some power to the local government to achieve a balance between the central and local forces. Third, the leadership system of each province is a combination of many staff members and the constraints of the chief executive, which is conducive to the mutual constraints of officials, that is, it can be said that collective leadership is combined with democratic centralism. Fourth, the provincial power is large but not specialized, which successfully solved the habit of local forces taking big seats. The implementation of the provincial system not only ensures that the central government has enough power to rule the whole country, but also ensures that local governments have appropriate power to build good places. It successfully solved the disadvantages of centralization in the Tang Dynasty and had a far-reaching impact on later generations. Since the Yuan Dynasty, the provincial system has been inherited and become the highest administrative institution in the region, which has gone through the Ming and Qing Dynasties and the Republic of China until today.