Qin and Han Dynasties were called Guangling and Jiangdu. The Eastern Jin and Southern Dynasties were called Nanyanzhou, and the Zhou Dynasty was called Wu Zhou. During the period of Emperor Wu of the Han Dynasty, there were thirteen secretariat departments in China, including Yangzhou secretariat department. In the Eastern Han Dynasty, the secretariat was located in Liyang (now Hexian County, Anhui Province), and moved to Shouchun (now Shouxian County, Anhui Province) and Hefei (now northwest of Hefei City, Anhui Province) in the last year.
In the Three Kingdoms, Wei and Wu established Yangzhou, Wei Zhi Shou Chun and Wu Zhi Jian Ye (now Nanjing, Jiangsu). After the Western Jin Dynasty destroyed Wu, it was still under construction (later renamed Jianye, later renamed Jiankang, and now it belongs to Nanjing).
In the ninth year of Emperor Kai of Sui Dynasty, Wu Zhou was changed to Yangzhou, but the headquarters was still located in Danyang (now Nanjing).
Extended data:
I. Place
Yangzhou is located in the middle of Jiangsu Province, on the north bank of the Yangtze River and at the southern end of the Jianghuai Plain. The city is between 32 degrees 15 minutes north latitude and 33 degrees/25 minutes east longitude19 degrees 0 1 minutes to 1 19 degrees 54 minutes east longitude. Longhua Formation in Guang Zhi Village, Zhoushan Town, Gaoyou City was identified as the center of land geography and geometry in Jiangsu Province. Yancheng and Taizhou in the east; It faces the Yangtze River in the south and Zhenjiang across the river. The southwest is connected with Nanjing.
The west is bordered by Chuzhou City, Anhui Province; The northwest borders Huai 'an City. Yangzhou is located at the intersection of the Yangtze River and the Beijing-Hangzhou Grand Canal, 32 degrees 24 minutes north latitude and 1 19 degrees 26 minutes east longitude. The maximum distance between east and west of the city is 85km, and the maximum distance between north and south is125km, with a total area of 659 1.2 1 km2.
Among them, the urban area is 2305.68 square kilometers (including the built-up area 132.0 square kilometers), and the county (city) area is 4285.53 square kilometers (including the built-up area of 95.2 square kilometers). The land area is 4856.2 square kilometers, accounting for 73.7%; Water area 1735.0 km2, accounting for 26.3%. ?
Second, climate.
Yangzhou city belongs to the transition zone from subtropical monsoon humid climate to temperate monsoon climate. The climate is characterized by four distinct seasons, abundant sunshine and rainfall, and the prevailing wind direction changes obviously with the seasons.
In winter, it is mainly dry and cold northerly winds, mostly northeast and northwest winds; In summer, it is mostly easterly wind blowing from the hot and humid southeast to the ocean, with southeast wind as the majority; There are many southeast winds in spring; There are many northeast winds in autumn. Winter is long, more than 4 months; Followed by summer, about 3 months; Spring and autumn are short, each lasting more than 2 months.
Baidu encyclopedia-Yangzhou