Ya 'an, a prefectual-level city in Sichuan Province, is located in the western edge of Sichuan Basin and the eastern foot of Qionglai Mountain. It is close to Chengdu in the east, Ganzi in the west, Liangshan in the south and Aba in the north. It is 120km away from Chengdu. It belongs to the western margin of Sichuan Basin, trans-Sichuan Basin and Qinghai-Tibet Plateau two major topographic areas. The climate type is subtropical monsoon humid climate. The total area of the city is 15,046 square kilometers, with jurisdiction over 2 districts and 6 counties; By the end of 2021, the city has a permanent resident population of 1.431 million.

Ya 'an City is located at the intersection of Sichuan-Tibet Highway and Sichuan-Yunnan Highway, 120 kilometers away from Chengdu. It is the transition zone of Sichuan Basin and Qinghai-Tibet Plateau, the transition zone of Han culture and national culture, the transition zone of modern central city and primitive natural ecological area. It is the gateway and the only way to pass through on the ancient Southern Silk Road and was once the capital of Xikang Province. It is a famous historical and cultural city and emerging tourism city in Sichuan Province, known as the "Rain City", known as the "throat of western Sichuan", "Gateway to Tibet", "ethnic corridor".
In 2021, the GDP of Ya 'an reached 84.056 billion yuan, an increase of 8.4% over the previous year based on comparable prices.