Ya'an City, also known as Yucheng, prefecture-level city in Sichuan Province, is located in the western edge of the Sichuan Basin, Qionglai Mountains, east of Chengdu City, west of Ganzi Tibetan Autonomous Prefecture, south of Liangshan Yi Autonomous Prefecture, north of Aba Tibetan and Qiang Autonomous Prefecture, is a mountainous area on the western edge of the Sichuan Basin, across the Sichuan Basin and the Tibetan Plateau two major terrain areas, is a subtropical monsoon humid climate, the city's total area of 15,046 square kilometers. As of October 2022, the city has two municipal districts and six counties. As of the end of 2022, the city had a resident population of 1.433 million. In the 24th year of the Republic of China (1935), the rule was established as Ya'an County. Ya'an City is located at the junction of Sichuan-Tibet and Sichuan-Yunnan highways, 120 kilometers away from Chengdu, is the combination of Sichuan Basin and the Tibetan Plateau transition zone, the combination of Han culture and ethnic culture transition zone, the combination of modern central city and the pristine natural ecological zone transition zone, is the gateway to the ancient Southern Silk Road and must be passed through, was once the capital of Xikang Province. It is a famous historical and cultural city in Sichuan Province and an emerging tourist city, known as the "rainy city", "the throat of western Sichuan", "the gateway to Tibet", "ethnic corridors "" Lungs of Tianfu "" panda hometown ", the territory of Mengding Mountain is the birthplace of the world's tea culture, the birthplace of the world's tea civilization, the world's tea culture sacred mountain. In 2023, Ya'an realized a gross regional product of 101.003 billion yuan, a year-on-year growth of 5.8% at comparable prices.