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Emperor Wen of Sui Emperor Yang Jian changed the three-level administrative divisions of state, county, and county in previous dynasties to the second-level state and county; His son, Emperor Yang Guanggai of the Ming Emperor of Sui

It is the second level of county and county, and its essence is the same, except that the "state" is changed to "county". Pen ~ fun ~ pavilion www.biquge.info Tang Dynasty followed the Sui Dynasty's second-level administrative division mechanism

In the initial stage, there were two levels of state and county; By the time of Xuanzong of the Tang Dynasty, the "state" was changed to "county", which was the second level of county and county, and was considered important

The place is set up as a "house".

The Tang Dynasty also set up a "Dao" in the state, but did not have a fixed governor, but the central government temporarily appointed the person in charge of the Dao because of the need.

Inspecting and inspecting the prefectures and counties under their jurisdiction only plays the role of supervision and inspection.

In 640 (the fourteenth year of Zhenguan), according to statistics, there were 360 prefectures (prefectures) in the Tang Dynasty, with 1,557 counties under its jurisdiction.

As early as 627 (the first year of Zhenguan), the imperial court divided the country into ten "roads" according to the direction of mountains and rivers and the characteristics of landforms: Kannai Province

, Henan Province, Hedong Province, Hebei Province, Longyou Province, Shannan Province, Jiangnan Province, Huainan Province, Jiannan Province and Lingnan Province.

The jurisdictions of each province are roughly as follows:

Guannei Road: It is equivalent to the central and northern parts of present-day Shaanxi, Longdong of Gansu and Hetao of Inner Mongolia.

Henan Province: It is equivalent to the area south of the Yellow River in present-day Henan and Shandong provinces, and north of Jiangsu and Anhui provinces.

Hedong Road: It is equivalent to the area of present-day Shanxi Province and the northwest part of Hebei.

Hebei Province: The area north of the Yellow River and south of the Great Wall of Hebei Province, which is equivalent to the two provinces of Henan and Shandong.

Longyou Road: It is equivalent to Longxi in present-day Gansu, east of Qinghai Lake in Qinghai Province and eastern Xinjiang.

Shannan Road: It corresponds to the eastern part of present-day Sichuan, the southwestern part of Henan, the western part of Hubei, Shaanxi Province and the southern part of Gansu.

Jiangnan Province: equivalent to the four provinces of Jiangxi, Zhejiang, Fujian and Hunan, south of the Yangtze River in Jiangsu and Anhui, Hubei and Sichuan

south and northeast of Guizhou.

Huainan Road: It is equivalent to the area south of the Huai River in present-day Jiangsu and Anhui provinces, and the area north of the Yangtze River in eastern Hubei.

Jiannan Road: It corresponds to the area of present-day central Sichuan and northern Yunnan.

Lingnan Road: It corresponds to the two provinces of present-day Guangdong, Guangxi and northern Vietnam.

In addition to these states and provinces in China, the Tang Dynasty and the Wu and Zhou dynasties also set up the capital protectorate (later also known as the Dadu Protectorate) in the border areas.

After Tang Taizong pacified Gaochang, he began to set up the Anxi Protectorate; Later, during the period when Wu Zetian and Gaozong were in government together and Wu Zetian was in power alone, again

Gradually increased, to the Wu Zhou Dynasty of Wu Zetian, with the continuous expansion of the territory, a total of Andong, Dongyi, Anbei, Shan Yu,

Anxi, Beiting, Kunling, Mengchi, Annan and other nine prefectures, and the jurisdiction of Tang Taizong's Anxi Prefecture into a geometric progression

Extensions; But by the time of the ruined son Tang Xuanzong Kaiyuan Tianbao, there were only 6 Duhufu left: Anxi Duhufu, Shan Yu Duhufu, and Anbei

Metropolitan Protectorate, Andong Metropolitan Protectorate, Annam Metropolitan Protectorate, and Kitaniwa Metropolitan Protectorate.

The capital of the Tang Dynasty was divided into three types: the Great Metropolitan Protectorate, the Upper Metropolitan Protectorate, and the Lower Metropolitan Protectorate.

Anxi Protectorate: The largest jurisdiction once included the north and south of the Tianshan Mountains, and the west reached Persia (now Iraq)! That is, present-day Xinjiang and Gil

All of Kyrgyzstan, Afghanistan and most of Uzbekistan, eastern Tajikistan, northeastern Iran, eastern Turkmenistan

Half, eastern and southeastern Kazakhstan. After the establishment of the Beiting Protectorate in the Wuzhou Dynasty, the Anxi Metropolitan Protectorate was in charge of the south of the Tianshan Mountains

of the Western Regions. It covers 16 states west of Khotan and east of Persia, and governs 16 prefectures, 80 prefectures, and 100 prefectures

10 counties, 126 military offices.

The prefecture was successively set up in Xizhou (in present-day Xinjiang) and Qiuci (in present-day Kuqa, Xinjiang).