Historical role: 1. It strengthened the central government's management of local governments, consolidated the rule of the Yuan Dynasty, and was conducive to consolidating national unity.

2. The provincial system laid the foundation of the provincial administrative region of China, which has a far-reaching impact on later generations.

Features: Shandong, Shanxi and Hebei are called bellies and directly belong to the central central provinces.

In other areas, except Tubo and Uighur areas, Lingbei, Liaoyang, Henan, Shaanxi, Sichuan, Gansu, Yunnan, Jiangsu, Zhejiang, Jiangxi and Huguang provinces have inherited the previous system and set up roads, prefectures, prefectures and counties.