Yanqing District (), formerly known as Yanqing County before 2015, is a district of the municipality of Beijing located northwest of the city proper of Beijing. The district consists of 3 subdistricts, 11 towns and 4 townships, and borders the Beijing districts of Huairou to the east and Changping to the south as well as the Hebei counties of Huailai to the west and Chicheng to the north. The district hosted the Expo 2019, and hosted alpine skiing, bobsled, luge and skeleton during the 2022 Winter Olympics. History In the Tang dynasty, Guichuan County, named after the Gui River, was established and belonged to the Gui Prefecture in Hebei, with a defensive military city. Eventually in 1952, it was reassigned to the Zhangjiakou Special Zone [zh] in Hebei Province, and in 1958, it was transferred to Beijing. In November 2015, the State Council of the People's Republic of China approved the adjustment of the administrative divisions of Beijing, and Yanqing County was abolished and established as a district. Yanqing District became sister cities with Dongdaemun District, Seoul, when they established friendly relations in 1997 and signed a cultural and sports exchange agreement and an economic exchange agreement in 2011. Climate Yanqing District has a continental monsoon climate, a transitional zone between temperate zone and mid-temperate zone, semi-arid and semi-humid zone. This is a unique climate, with cold winters and cool summers, with Yanqing being known as Beijing's "summer capital". The climate is cold in winter and is cool in summer, with an average annual temperature of 8℃. It has an area of 105 square kilometers in the tropical zone, with abundant shallow geothermal resources. With 2,800 hours of sunshine per year, it is the region with the most abundant solar energy resources in Beijing. Also, Yanqing's wind resources account for 70% of Beijing. The Yanqing Badaling Great Wall Basin is surrounded by mountains on three sides in the north, south, east, and Guanting Reservoir to the west, namely the Yanhuai Basin. Yanqing is located in the east of the basin, with an average elevation of about 500 meters. Haituo Mountain is the highest peak in the territory, with an elevation of 2241 meters and the second highest peak in Beijing. Yanqing is surrounded by mountains to the north, east and south, and water to the west, with an average altitude of 500 meters above sea level, and is predominantly mountainous,