Ya 'an, a prefecture-level city in Sichuan Province, is located at the western edge of Sichuan Basin, at the foot of Qionglai Mountain, with Chengdu in the east, Ganzi in the west, Liangshan in the south and Aba in the north, 0/20km away from Chengdu/KLOC.
It belongs to the mountainous area on the western edge of Sichuan Basin, spanning the two topographic areas of Sichuan Basin and Qinghai-Tibet Plateau. The climate type is subtropical monsoon humid climate; The total area of the city is 15046 square kilometers, which governs 2 districts and 6 counties. According to the data of the seventh census, as of 0: 00 1 1 on June 2020, the permanent population of Ya 'an City was 1434603.
Nanchong, also known as "Fruit Capital and Silk Capital", is a prefecture-level city under the jurisdiction of Sichuan Province, one of the central cities of Chengdu-Chongqing Economic Circle, an important node city of the "Belt and Road" strategy, an important node city of northeast Sichuan urban agglomeration, an excellent tourist city in China, a national garden city, a national clean energy demonstration city, a dense central city in southern Suicheng District, and a top 200 charming city with China characteristics.
Ya 'an landform:
Ya 'an City belongs to the mountainous area on the western edge of Sichuan Basin, which straddles the Sichuan Basin and the Qinghai-Tibet Plateau. It is a transitional zone from the basin to the Qinghai-Tibet Plateau. The terrain is high in the north, west and south and low in the middle and east. The highest point is Fairy Liangzi at the junction of Asbestos, Kangding and Jiulong counties in the southwest, with the main peak at an altitude of 5,793 meters and the lowest point at the exit of Qingyi River in Caoba, with an altitude of 5 15.97 meters.
The city's mountains are vertical and horizontal, the surface is rugged, and the landform types are complex and diverse, with many mountains and few hills and flat dams. Hilly flat dams are mostly distributed on both sides of the valley, accounting for only 6% of the city's area. The low mountain (500 ~ 1000m) is located in Yucheng district and the famous mountain county in the middle, accounting for 4% of the city's area. Zhongshan (1500 ~ 3500m) is the most widely distributed, accounting for more than 60% of the total land.
The high mountains (3500 ~ 5000m) account for 6% of the total area of the city, which are mostly distributed in Baoxing County, northwest of tianquan county, southwest of Shimian County and the northern end of Lushan County, with a relative height difference of 1000m ~ 2000m. The main mountainous areas in the territory belong to Qionglai Mountain and Daxue Mountain, and the southeast edge is mainly the north section of Xiaoxiangling Mountain in the north-south direction. Daxiangling is not only the main watershed between Dadu River and Qingyi River, but also an important dividing line of urban physical geography.