(2) It reflects the system of three provinces and six departments in the Tang Dynasty. Function: For the emperor, this system is conducive to strengthening the imperial power and restraining the rights of various officials. For the society, all departments should perform their duties and strengthen work efficiency.

(3) provincial system. Reason: The Yuan Dynasty had a vast territory, and the provincial system represented the central jurisdiction, which strengthened the centralization, suppressed some nobles and stabilized the country.