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General situation of Cao 'e River basin
Pan 'an County is located in the middle of Zhejiang, at the junction of Jinhua, Shaoxing, Taizhou and Lishui, bordering Dongyang, Yongkang, Xinchang, Xianju, Tiantai and Jinyun. The name of Pan 'an County comes from the statement of "Guoan Rock" in Xunzi Guo Fu, which means "as safe as a rock". 1939 Pan 'an County was established, 1958 was merged into Dongyang, and 1983 resumed the county organizational system. This is a relatively young county. Pan 'an has "nine mountains, half water and half fields". Pan 'an Pan Da Mountain Range is the birthplace of Yandang Mountain, Kuocang Mountain, Huiji Mountain and Xianxialing Mountain, and also the main source of the four major water systems of Qiantang River, Oujiang River, Lingjiang River and Caoejiang River. Known as "the ancestor of mountains and the source of water". Pan 'an has a good ecology, beautiful scenery, beautiful environment and lush vegetation, and is known as "the big bonsai in central Zhejiang and the natural oxygen bar city". The climate is pleasant, especially cool in summer, and the annual average temperature is 16.8℃, making it a summer resort. It is the "hometown of mushrooms in China" and "hometown of medicinal materials in China". Five of the famous "Zhejiang Eight Flavors" (Atractylodes macrocephala, Rhizoma Corydalis, Radix Scrophulariae, Fritillaria thunbergii, Radix Paeoniae Alba, Chrysanthemum morifolium, Radix Ophiopogonis and Radix Curcumae) are mainly produced in Pan 'an. It is "the hometown of ecological Longjing tea in China" and "the hometown of famous tea in China", and it is listed in the origin protection of Longjing tea. It is also the "hometown of torreya grandis in China" and one of the earliest cradles of torreya grandis in China. It has a long history of development and profound cultural heritage. There are more than 6 100 ancient torreya trees in China over a hundred years, and the oldest one is over 1500 years old, so it is known as the "King of Torreya grandis in China". Pan 'an is also rich in cultural and health resources, with two state-level cultural relics protection units, namely "Yushan Ancient Tea Farm" and "Confucius Temple", and a large number of national and provincial intangible cultural heritages, such as "refining fire" and "welcoming flags". A number of scenic spots such as Baizhangtan, Huaxi, Shibaxi, Underwater Cave and Wulongxia have been developed, and a number of famous historical and cultural villages such as Jianshankou, Tunxi in Pan Feng and Shuangfeng Damin have been cultivated.

Xinchang county, known as Dongdong in ancient times, is also known as Nanming. Located in the east of Zhejiang Province, upstream of Cao 'e River. Before the Tang Dynasty, it was a county, and it was established in the second year of Kaiping in the Five Dynasties (908). It is now under the jurisdiction of Shaoxing City. It is listed in the coastal economic open zone and belongs to the Shanghai Economic Zone. It is a hilly county with mountainous areas and dry land as the mainstay, and is known as "eight mountains, half water and half fields". Xinchang county is a part of the low mountains and hills in Zhejiang and Fujian, surrounded by Tiantai Mountain, Siming Mountain and Huiji Mountain. The topography of the county gradually inclines from southeast to northwest, forming three landforms: southeast mountain, central platform and northwest valley plain. Xinchang county has three major rivers. County watershed area 1209 square kilometers, 73 tributaries, with a total length of 455.6 kilometers and a river network density of 0.38 kilometers/square kilometer. It is a typical mountain river with many tributaries, large drop and rich hydraulic resources. The main rivers are Chengtan River, Xinchang River and Huangzejiang River. Xinchang has a subtropical monsoon climate, which is mild and humid with four distinct seasons. In early summer, there is often "Meiyu" accompanied by heavy precipitation. Xinchang's landscape is bound to be rich in humanities and produce rich and colorful history and culture. Poets in the Tang Dynasty gathered in Tunxi, and their poems mostly involved Tianmu, Wozhou and Shicheng. During the period from Kaiyuan to Tianbao, Li Bai, a poet immortal, and Du Fu, a poet saint, visited Tunxi successively, and sang such famous works as Wozhou and Tianmu Mountain Dreaming Up to Heaven.

Shengzhou City is located in the east of Zhejiang Province, in the upper reaches of Cao 'e River, from the confluence of Chengtan River and Changle River to the Tongxi River in Xiashi Town, Sanjie Town. It is the main river course in China, and its terrain inclines from southwest to northeast, belonging to a low mountain basin. The Siming Mountain Range in the east is the boundary mountain between Shengzhou and Shangyu, Yuyao, Fenghua and Xinchang, and the watershed between Tunxi and Yongjiang. The south belongs to the Pan Da Mountains, extending from south to north; To the west and north are Huiji Mountain Range, which is the watershed between Puyang River and Tongxi River, and Longtouding is the boundary mountain between Shengzhou, Shaoxing County and Zhuji City. Shengxin basin formed by geological structure in the middle, distributed along the river bank, hilly platform in the southeast and north, low mountain area around Shengxin basin, and Zhongshan area distributed in Baixi Mountain and Siming Mountain. Located in the subtropical monsoon climate zone, it has obvious continental climate and basin microclimate characteristics. There were humans in Shengzhou in the Neolithic Age. According to legend, Yu Xia stopped at Tunxi (today's Tunxi) to control water, and personally held an axe, leading people to split Lushan Mountain and Shengshan Mountain, releasing the flood in the stream and improving the living environment. During the Spring and Autumn Period and the Warring States Period, it belonged to the State of Yue and the State of Qin. Qin Zhi county. 1August, 995, the county was withdrawn and the city was established. In the thirty-seventh year of the first emperor (2 10), Qin Shihuang traveled eastward to Huiji County. According to legend, he sent someone to dig a thousands of feet earth pit on the south side of today's Huangcheng Xingzi Peak to vent the king's anger and make the pit famous. Shengzhou is a famous hometown of tea, fruits and vegetables, bamboo weaving, Mulan and neckties. Shengzhou Mountain is rich in water and beautiful, and it is said that "the southeast landscape is the most beautiful and the national scenery is the first". The gentry in the north longed for seclusion, mountains and rivers to relax and settle down. Eighteen eminent monks and scholars in the Eastern Jin Dynasty lived or traveled. In his later years, Wang Xizhi fell in love with the mountains and rivers here and lived in seclusion here. Xie Lingyun wrote "Mountain Residence Fu" and many poems about singing. Li Bai, Du Fu, Lu You and other literati, sages and celebrities all came here, leaving many beautiful sentences about singing and sightseeing. Shengzhou is an important scenic spot with unique charm on the "Road of Tang Poetry" in Zhejiang. Shengzhou is a famous hometown of Yue Opera. Shaoxing Opera, which originated from the folk, evolved from the floor-to-floor songs popular on both sides of Tunxi during Xianfeng period of Qing Dynasty, and has now developed into the second largest drama in China. "Shengzhou is full of humanistic atmosphere. Scholars in previous dynasties 15 1. Some revolted, some retired from Japan in Yu 'an, and some revolted with Taoist Qiu. Famous figures in modern times include Zhu Shaokang, economist, educator and demographer Ma Yinchu, medical expert Shen Kefei, water conservancy expert Song Xishang, geographer, mechanical industry expert, industrialist An, landscape painter, musician, founder of Loess Painting School Liu Wenxi, theorist Xing Bensi, aviation doctor Yuan Shaowen, academicians of the two academies, Wu Yousheng, Wu Changxin and Zhang Miman.

Shangyu District, the name of Shangyu, was obtained from Yu Shun. According to Tai Ji: "Shun avoided here, so it was a famous county. Guan Bai followed closely, so Guxian North related to Baiqiao. It is also said that Yunshun and the vassal States will have a meeting, and because they are entertaining each other, they are entertaining each other (entertaining and worrying). " In the twenty-fifth year of the King of Qin (222 BC), a county was established, belonging to Huiji County. 1992 shangyu withdrew from the county to set up a city. Shangyu has a long history and a rich collection of people. As early as 3,000 years ago, there were written records of Shangyu in Oracle Bone Inscriptions, with a history of more than 2,200 years. It is one of the earliest counties in Zhejiang, one of the earliest cradles of celadon in the world, and the hometown of Zhu Yingtai, the heroine in the classic love story The Legend of Liang Zhu. In history, three famous people gathered together, namely "Shunguan", "Dongshan Elegant Residence" and "Baima Chunhui". Wang Chong, the originator of China's landscape poems, Zhu Kezhen, Wu Juenong and famous film director Xie Jin emerged. Shangyu County is located in the southeast of Zhejiang Province, adjacent to Yuyao City in the east, Shengxian County in the south, Shaoxing County in the west, Qiantang River in the north and Haiyan County across the sea. The terrain is high in the south and low in the north, with low mountains and hills in the south and water network plains in the north accounting for half respectively, commonly known as "five mountains, one water and four fields". The low mountain in the south belongs to two branches, and the rest of Siming Mountain in the southeast is relatively high. The southwest belongs to the remnant vein of Huiji Mountain, which is slightly gentle. The northern water network plain belongs to the category of Ningshao plain, with low terrain and an average elevation of about 5 meters. The northernmost part is the coastal plain, with an average elevation of about 10 meter. Cao 'e River is the fourth largest river in Zhejiang Province, running through the whole territory from south to north. It belongs to the East Asian monsoon climate, with obvious monsoon, mild climate, distinct four seasons and wet and rainy. Due to the complex terrain, there are obvious regional differences in light, temperature and water, and there are many disastrous weather. The general trend is that there are more floods than droughts. The annual average temperature is 16.4℃, the frost-free period is about 25 1 day, and the annual average rainfall is about 1400 mm, with beautiful mountains and rivers and pleasant scenery. There are 3 provincial-level cultural relics protection units, such as Chong Wang Tomb, Xiaoxiantan and ancient celadon kiln site in front of kiln, and more than 0 county-level cultural relics protection units/kloc-0. Cao E's injustice in Guanbai Town, Jiangxi Province is huge, especially famous for its sculptures, plaques and couplets, and is known as "the first temple in the south of the Yangtze River". Dongshan, the secluded place of Xie An, a politician in the Eastern Jin Dynasty, is located on the east bank of the middle reaches of Cao 'e River, where Xie 'an's tomb is located.

Keqiao District is located in the fertile Ningshao Plain in the north of Shaoxing City, Zhejiang Province, with a distance of 0/06km from Ningbo, the port of the Orient, 50km from Hangzhou, a paradise on earth, and 0/85km from Shanghai, the Oriental Pearl. Ke Qiao Nanping Huiji Mountain is a water town in the northern plain with mild and humid climate and beautiful scenery. It is called the land of plenty, the land of silk and the land of culture. It is a famous water town, bridge town, wine town, calligraphy town, opera town and celebrity town in China. As one of the most economically developed areas in Zhejiang Province, China Textile City, the largest cloth distribution center in Asia, is colorful, with thousands of merchants gathered in the east, west, north and south.