Ziyang City, Sichuan Province

Ziyang Ziyang, a prefecture level city in Sichuan Province, is a Ziyang County under the jurisdiction of Zizhou in ancient times. Ancient literary giants Chang Hong, Dong Jun and Wang Bao are called "three sages of Ziyang". Lezhi is the hometown of Marshal Chen Yi, the founder of the country. It is located in the middle of Sichuan Basin, adjacent to Neijiang in the south, Chengdu and Deyang in the north, Chongqing and Suining in the East, and Meishan in the West. It is the only regional central city connecting Chengdu and Chongqing at the same time. Ziyang County was established in 135 BC in the Western Han Dynasty, followed by prefectures and counties, with a history of more than 2100 years. 35000 years ago, the ancient "Ziyang people" opened the history of human civilization in Sichuan.

On February 26, 1998, Ziyang Prefecture was established with the approval of the State Council. On June 14, 2000, Ziyang Prefecture was abolished with the approval of the State Council, and a prefecture level Ziyang City was established. On May 3, 2016, the State Council agreed to change the county-level Jianyang City managed by Ziyang City to Chengdu City. Now it has jurisdiction over Yanjiang District, Anyue County and Lezhi county, with a total area of about 5757 square kilometers.

Ziyang's city name cards are "car city in Western China", "demonstration city with beautiful environment in Sichuan Province", "China's energy saving city", "green Ziyang", "hometown of three sages" and "hometown of longevity in China".

In 2020, the GDP will reach 80.75 billion yuan, with a year-on-year growth of 4.0%, 0.2 percentage point higher than that of the whole province (3.8%), ranking 10th in the province. Among them, the added value of the primary industry was 16.85 billion yuan, an increase of 5.4%; the added value of the secondary industry was 22.86 billion yuan, an increase of 3.8%; the added value of the tertiary industry was 41.04 billion yuan, an increase of 3.5%.

Historical evolution

Ziyang was a state of Shu in the Zhou Dynasty. In the sixth year of emperor Zhaoxiang of Qin Dynasty (301 BC), it was under the jurisdiction of Shu County of Qin state.

In the sixth year of Jianyuan (135 BC), Emperor Wu of the Western Han Dynasty set up a county, named Zizhong County. It belongs to Qianwei County of Yizhou and is located in today's Yanjiang town.

In 502, Emperor Wu of Liang Dynasty occupied Yizhou on behalf of Qi, and the ancient Zizhong County was abolished.

In 553, the second year of the abolition of the emperor of the Western Wei Dynasty, Ziyang was set up as the state government;

In the second year of Wucheng (560) of the Northern Zhou Dynasty, Ziyang was transferred to Zizhou to the old city of Zizhong. Because the county seat was in the north of Zishui (today's Tuojiang River), Ziyang County was established in the old city of Zizhong, and the name of Ziyang has been used since then.

In the seventh year of kaihuang of Sui Dynasty (587), Zizhou government moved from Ziyang County to Panshi county (now zizhongbei).

In Sui and Tang Dynasties, Ziyang County belonged to Jianzhou and Zizhou. In 1243, it was abolished and merged into Jianzhou.

In 1271, Kublai changed his name to yuan, and Ziyang became a war zone in the yuan and Song dynasties.

In 1371, Zizhou was changed into Zixian, and in 1373, Jianzhou was reduced to Jianxian, and Ziyang was restored. In 1377, Ziyang County was destroyed by war and merged into Zixian county and Jianxian county respectively. In the first year of Chenghua (1465), it was divided into 4 townships of Jianxian county and 3 townships of Zixian County, and restored to Ziyang County, belonging to Chengdu Prefecture.

In 1644, Zhang Xianzhong conquered Ziyang. The following year, Jia Liandeng, commander in chief of the Southern Ming Dynasty, fought fiercely with Zhang Xianzhong and recaptured Ziyang. In four years, Zhang Xianzhong's remaining troops united with Nanming legacy to defeat Wu Sangui by Liu Wenxiu. In fifteen years, the Qing army occupied Ziyang.

In the early Qing Dynasty, it belonged to Chengdu government. In 1727, Zhili Prefecture was established as Zizhong County. Jurisdiction Ziyang County, Neijiang County, Renshou County, Jingyan county.

In the second year of the Republic of China (1913), the state was abolished and the county was governed by Dao. Ziyang County belonged to xiachuannan road. The next year, xiachuannan road was changed to Yongning road.

On December 11, 1949, the advance troops of the 12th army of the third corps of the second field army of the Chinese people's Liberation Army entered Ziyang, and Ziyang declared its liberation.

After the founding of the people's Republic of China, Ziyang County belonged to Neijiang District, which was later changed to Neijiang district. In 1985, it belonged to Neijiang City. In 1993, Ziyang County was changed into county-level Ziyang City, which was managed by Neijiang City.

In 1950, the Central People's government changed the supervision area during the period of the Republic of China into a special area. Ziyang County belongs to Neijiang special area of southern Sichuan administrative region, Anyue County and Lezhi county belong to Suining special area of northern Sichuan administrative region.

In 1958, Suining district was abolished and Anyue and Lezhi counties were divided into Neijiang district.

In 1968, Neijiang district was changed into Neijiang District, and the subordinate counties remained unchanged.

In 1993, Ziyang County was abolished and a county-level Ziyang City was established, which was directly under the jurisdiction of Sichuan Province and managed by Neijiang City.

On February 26, 1998, the State Council approved the establishment of Ziyang Prefecture, which has jurisdiction over Anyue and Lezhi counties in Neijiang City, and Ziyang and Jianyang cities in custody.

On June 14, 2000, with the approval of the State Council, Ziyang Prefecture and county-level Ziyang City were abolished and prefecture level Ziyang City and Yanjiang District of Ziyang City were established. Ziyang City governs Anyue County, Lezhi county and Yanjiang District of Ziyang Prefecture. Jianyang City is directly under the central government of Sichuan Province and managed by Ziyang City. In November 2000, Yanjiang District People's government was established. At the end of December, Ziyang Municipal People's government was officially established.

On May 3, 2016, the State Council agreed to change the county-level Jianyang City managed by Ziyang City to Chengdu City.

administrative division

Ziyang City governs three county-level administrative divisions (Municipal District 1, county 2) and 89 township level administrative divisions (street 9, town 67, township 13). It covers an area of 5757 square kilometers and has a population of 3.58 million. Ziyang Municipal People's government is located at No. 1, Guangchang Road, Yanjiang district.

geographical environment

position

Ziyang is located at 104 ° 21 ′～ 105 ° 27 ′ E and 29 ° 15 ′～ 30 ° 17 ′ n, between Chengdu and Chongqing. It is the central city connecting Chengdu and Chongqing in Sichuan Province, with Chengdu in the North (88km away), Neijiang in the south, Chongqing in the East (257km away), Suining and Meishan in the West.

hydrology

The Tuojiang River, which originates at the foot of Jiuding Mountain in the Chaping mountains of Northwest Sichuan Plateau, enters Linjiang Town, Yanjiang District, flows southeast, leaves Wuhuang Town, Ziyang City, bordering Neijiang River, and winds eastward. Tuojiang River passes through Linjiang, Baohe, Baotai, Yanjiang, Songtao, Nanjin, Zhongyi and Wuhuang, with a total length of 175.4 km, a water area of more than 30 square kilometers, an average flow of 225-275 cubic meters per second, and a drainage area of more than 2000 square kilometers. Due to the development of river network, there are 110 tributaries (medium and small rivers) of Tuo River and Fujiang River. There are 11 rivers with a drainage area of more than 100 square kilometers and 8 small rivers with a drainage area of 50-100 square kilometers. There are more than 40 short streams, almost all of which originate from hills, with flat, gentle and wide riverbed, shallow terrain cutting, small drop, gentle flow and wide bank potential. They are typical water system networks in hilly areas.

climate

Ziyang has a subtropical monsoon climate with an average annual temperature of 17 ℃, an average annual rainfall of 1100 mm, an annual sunshine duration of 1300 hours and an average frost free period of 300 days. In the whole year, there are more clouds and less sunshine, higher air humidity and smaller temperature difference between day and night, smaller average wind speed and fewer gale days. The results show that the annual average temperature of each county in Ziyang City is about 17 ℃; the annual precipitation is about 950mm; the annual sunshine is about 1250 hours; the average temperature is about 26.5 ℃ in the hottest month of August; the average temperature is about 6.5 ℃ in the coldest month of January; the extreme maximum temperature is 40.2 ℃; the extreme minimum temperature is - 5.4 ℃. In terms of basin climate, Ziyang City also has the characteristics of South North and East West climate transition zones. Within the territory, the altitude of Longquan Mountain in the northwest is generally 600-1000 meters, which is 300-500 meters higher than that of Qiuling area. The effect of air sinking, warming and dehumidification also has a certain impact on the climate of Ziyang.

landforms

Ziyang City is located in the central Sichuan fold zone of the Cathaysian Sichuan subsidence zone, between the hemispherical structure of longnusi and the radiation structure of Weiyuan, high in the West and low in the East. According to the large geomorphic form, Ziyang City can be divided into two geomorphic types: Hill and river alluvial dam. Among them, hilly areas account for more than 90% of the total area. The terrain is mainly affected by the ring structure of Longnu hemisphere, which is characterized by simple structure and gentle stratum. According to the old and new order, the exposed strata are Quaternary Holocene strata, Jurassic Penglaizhen Formation strata, Jurassic Suining Formation strata, Jurassic Shaximiao Formation strata, and the soil is mainly zongzi clay. Generally, the altitude is between 300 and 550 meters, and the lowest point of the dam is at the boundary of Qiongjiang River in xiajiaba (247 meters above sea level).

natural resources

mineral products

The main mineral resources in Ziyang include shale, sand for construction, limestone and sandstone for construction stone, which are distributed in some towns.

Botany

In 2005, the total forest volume of Ziyang City was 8628538 cubic meters. The forest coverage rate is 32%. There are more than 2000 kinds of wild plants and 600 kinds of trees in the area. The main trees are cypress, mulberry, banyan, Cinnamomum camphora, gingko, elm, acacia, Coriaria, Neosinocalamus, etc. Among them, cypress trees account for more than 70% of the total amount of trees planted, and the living forest volume is more than 2 million cubic meters. According to statistics, there are 598 ancient and famous trees of 19 species in the area, among which 8 are more than 1000 years old. It is distributed in Lezhi county (1 red bean tree, 1 Phoebe tree, 5 banyan trees) and Anyue County (1 cypress tree).

animal

There are 236 species of wild animals in Ziyang, which belong to 4 national first-class species (sika deer, white stork, Golden Eagle, clouded leopard), 21 national second-class species (giant salamander, mandarin duck, kite, goshawk, kestrel, red bellied pheasant, collar horn owl, spotted head bunting, long eared owl, short eared owl, yellow throated mink, otter, big civet, little civet, golden cat, macaque, brown cat, little reed warbler, long legged Yangji, blue eared Kingfisher) Among them, there are 15 key species at the provincial level, and 196 other protected animals

Chinese PinYin : Si Chuan Sheng Zi Yang Shi