Chengdu, referred to as Rong for short, is the capital of Sichuan. 1993 was identified by the State Council as the center of science and technology, commerce, finance and transportation and communication in southwest China. It is a midwestern city with the largest number of foreign consulates and the largest number of international routes. Approved by the State Council in 20/0/5, KLOC was upgraded to an important national high-tech industrial base, a commercial logistics center, a comprehensive transportation hub and an important central city in the western region. ?
Chengdu is located in the west of Sichuan Basin and the hinterland of Chengdu Plain. It is adjacent to Deyang and Ziyang in the east, Ya 'an and Aba in the west and Meishan in the south. Chengdu has jurisdiction over 5 counties in Jinjiang District and other 10 districts and 4 county-level cities. At the end of 20 14, the built-up area in Chengdu area was 604 1 km2, and the permanent population was144.28 million. ?
Chengdu is "the first batch of national historical and cultural cities" and "the best tourist city in China", with a history of more than 3,000 years. It has many places of interest and cultural landscapes, such as Dujiangyan, Wuhou Temple, Du Fu Caotang, Jinsha Site, Shuming Mausoleum, Wangjianglou and Qingyang Palace. ?
Chengdu has a long geological history and its strata are fully exposed. The topography of the whole city is obviously different The northwest is high and the southeast is low. The western part belongs to the marginal area of Sichuan basin, mainly in deep mountains and hills. Most of them are between1000-3000m above sea level. The highest point is Shuanghe Township, Dayi County, with an altitude of 5364 meters and a relative height of about 1000 meters. The eastern part belongs to the basin-bottom plain of Sichuan Basin, which is the heart of Chengdu Plain. It is mainly composed of Quaternary impact plain, platform and some low hills. The soil layer is deep and fertile, with a long history of development, high reclamation index and flat terrain. The altitude is generally about 750 meters, and the lowest point is Yuntai Township, Jintang County, with an altitude of only 387 meters.
The height difference between east and west of Chengdu is 4977 meters. Because of the obvious difference in surface elevation, the spatial distribution of climate factors such as water and heat is directly different. Not only is the temperature, water temperature and ground temperature in the western mountainous area far lower than that in the eastern plain, but there is also a vertical climate zone with obvious temperature difference between the upper and lower mountainous areas, so the biological resources in Chengdu are various, complete in categories and relatively concentrated in distribution.