In the first year of Zhenguan of Emperor Taizong (627), the whole country was divided into ten roads according to the situation of mountains and rivers. Namely Guanzhong, Henan, Hebei, Hedong, Longyou, Shannan, Jiannan (Sichuan), Huainan, Jiangnan and Lingnan. At first, there were no fixed officials and offices, but they belonged to the monitoring area, and only temporary officials were sent to inspect. In the 21st year of Xuanzong Kaiyuan (733), it was divided into fifteen roads, and Jiangnan Road was divided into Qianzhong Road, Jiangnan West Road and Jiangnan East Road. Shannan Road is divided into two roads, Shanhaiguan Gyeonggi Road and Henan Duji Road. Every channel has an interview and disposal ambassador, and there is no local real power. It is illegal to sue every three years, and there is a similar history of China. Later, when the border was unstable, he also served as an envoy, gradually mastering the financial and military power, and was called our envoy. During the Anshi Rebellion, Henan and Hebei provinces also set up our time. Our era is arrogant, gradually dominating one side, out of control, becoming a buffer region, and the father dies and the son attacks, which is also commonly known as the square town.

Yuanhe year is the spring calendar year of Tang Xianzong (reign time? 806 ~ 820)

The map of the Yuan Dynasty and Fangzheng Town mean that the territory of China is the same now, which records the division of the territory and administrative divisions of the Tang Dynasty.