How big is the urban area of Beijing?

The land area of Beijing is 164 10.54 square kilometers. Beijing for short is located at east longitude115.7-17.4, north latitude 39.4-410.6, and its center is located at 39 54' 20 "north latitude and east longitude 1638. Located in the northern part of North China Plain, adjacent to Bohai Bay, with Liaodong Peninsula on the top and Shandong Peninsula on the bottom. Beijing is adjacent to Tianjin and is surrounded by Hebei Province together with Tianjin. Beijing is high in the northwest and low in the southeast. The west, north and northeast are surrounded by mountains, and the southeast is a plain that slowly inclines to the Bohai Sea. The main rivers flowing through the territory are: Yongding River, Chaobai River, North Canal and Juma River. Most of them originate in the mountainous areas in the northwest, cross the mountains, meander through the plains in the southeast, and finally merge into the Bohai Sea respectively. By the end of 20 17, there were 16 municipal districts in Beijing: Dongcheng District, Xicheng District, Chaoyang District, Fengtai District, Shijingshan District, Haidian District, Shunyi District, Tongzhou District, Daxing District, Fangshan District, Mentougou District, Changping District, Pinggu District, Miyun District, Huairou District and Yanqing District. The following details are introduced: 1, Dongcheng District, belonging to Beijing, is located in the east of Beijing center, bordering Chaoyang District in the east and north, Fengtai District in the south and Xicheng District in the west, with a maximum distance of 5.2km from east to west and a maximum distance of 13km from north to south, with a total area of 41.84km2. Mentougou district is a municipal district under the jurisdiction of Beijing, which is located in the western mountainous area of Beijing. It is an old liberated area with a long history, culture and fine revolutionary tradition. As early as 10 thousand years ago, the "Donghu people" in the early Neolithic period flourished here.