Beijing

Beijing alternatively romanized as Peking is the capital of the People's Republic of China. It is the world's most populous national capital city, with over 21 million residents within an administrative area of 16,410.5 square kilometers (6336 sq. mi.). It is located in Northern China, and is governed as a municipality under the direct administration of the State Council with 16 urban, suburban, and rural districts. Beijing is mostly surrounded by Hebei Province with the exception of neighboring Tianjin to the southeast; together, the three divisions form the Jingjinji megalopolis and the national capital region of China.

Beijing is a global city, and one of the world's leading centers for culture, diplomacy and politics, business and economics, education, language, and science and technology. A megacity, Beijing is the second-largest Chinese city by urban population after Shanghai and is the nation's cultural, educational, and political center. It is home to the headquarters of most of China's largest state-owned companies and houses the largest number of Fortune Global 500 companies in the world, as well as the world's four biggest financial institutions. Beijing is the "billionaire capital of the world" with the highest number of billionaires living in the city. It is also a major hub for the national highway, expressway, railway, and high-speed rail networks. The Beijing Capital International Airport has been the second busiest in the world by passenger traffic since 2010, and, as of 2016, the city's subway network is the busiest and longest in the world. The Beijing Daxing International Airport, a second international airport in Beijing, is the largest single-structure airport terminal in the world.

Combining both modern and traditional style architectures, Beijing is one of the oldest cities in the world, with a rich history dating back three millennia. As the last of the Four Great Ancient Capitals of China, Beijing has been the political center of the country for most of the past eight centuries, and was the largest city in the world by population for much of the second millennium AD. With mountains surrounding the inland city on three sides, in addition to the old inner and outer city walls, Beijing was strategically poised and developed to be the residence of the emperor and thus was the perfect location for the imperial capital. The city is renowned for its opulent palaces, temples, parks, gardens, tombs, walls and gates. It has seven UNESCO World Heritage Sites—the Forbidden City, Temple of Heaven, Summer Palace, Ming Tombs, Zhoukoudian, and parts of the Great Wall and the Grand Canal—all of which are popular tourist locations. Siheyuans, the city's traditional housing style, and hutongs, the narrow alleys between siheyuans, are major tourist attractions and are common in urban Beijing.

Many of Beijing's 91 universities consistently rank among the best in the Asia-Pacific and the world. Beijing is home to the two best C9 League universities (Tsinghua and Peking) in the Asia-Pacific and emerging countries. Beijing CBD is a center for Beijing's economic expansion, with the ongoing or recently completed construction of multiple skyscrapers. Beijing's Zhongguancun area is a world leading center of scientific and technological innovation as well as entrepreneurship. Beijing has been ranked the No.1 city in the world with the largest scientific research output as tracked by the Nature Index since 2016. The city has hosted numerous international and national sporting events, the most notable being the 2008 Summer Olympics and 2008 Summer Paralympics Games. Beijing will become the first city ever to host both the Summer and Winter Olympics, and also the first city ever to host both the Summer and Winter Paralympics. Beijing hosts 175 foreign embassies as well as the headquarters of the Asian Infrastructure Investment Bank (AIIB), the Shanghai Cooperation Organisation (SCO) and the Silk Road Fund.

Beijing is situated at the northern tip of the roughly triangular North China Plain, which opens to the south and east of the city. Mountains to the north, northwest and west shield the city and northern China's agricultural heartland from the encroaching desert steppes. The northwestern part of the municipality, especially Yanqing County and Huairou District, are dominated by the Jundu Mountains, while the western part is framed by Xishan or the Western Hills. The Great Wall of China across the northern part of Beijing Municipality was built on the rugged topography to defend against nomadic incursions from the steppes. Mount Dongling, in the Western Hills and on the border with Hebei, is the municipality's highest point, with an altitude of 2,303 metres (7,556 ft).

Major rivers flowing through the municipality, including the Chaobai, Yongding, Juma, are all tributaries in the Hai River system, and flow in a southeasterly direction. The Miyun Reservoir, on the upper reaches of the Chaobai River, is the largest reservoir within the municipality. Beijing is also the northern terminus of the Grand Canal to Hangzhou, which was built over 1,400 years ago as a transportation route, and the South–North Water Transfer Project, constructed in the past decade to bring water from the Yangtze River basin.

The urban area of Beijing, on the plains in the south-central of the municipality with elevation of 40 to 60 metres (130–200 feet), occupies a relatively small but expanding portion of the municipality's area. The city spreads out in concentric ring roads. The Second Ring Road traces the old city walls and the Sixth Ring Road connects satellite towns in the surrounding suburbs. Tian'anmen and Tian'anmen Square are at the center of Beijing, directly to the south of the Forbidden City, the former residence of the emperors of China. To the west of Tian'anmen is Zhongnanhai, the residence of China's current leaders. Chang'an Avenue, which cuts between Tiananmen and the Square, forms the city's main east–west axis.

Beijing has a monsoon-influenced humid continental climate (Köppen: Dwa), characterized by very hot, humid summers due to the East Asian monsoon, and brief but cold, dry winters that reflect the influence of the vast Siberian anticyclone. Spring can bear witness to sandstorms blowing in from the Gobi Desert across the Mongolian steppe, accompanied by rapidly warming, but generally dry, conditions. Autumn, similar to spring, is a season of transition and minimal precipitation. The monthly daily average temperature in January is −2.9 °C (26.8 °F), while in July it is 26.9 °C (80.4 °F). Precipitation averages around 570 mm (22 in) annually, with close to three-quarters of that total falling from June to August. With monthly percent possible sunshine ranging from 47% in July to 65% in January and February, the city receives 2,671 hours of bright sunshine annually. Extremes since 1951 have ranged from −27.4 °C (−17.3 °F) on 22 February 1966 to 41.9 °C (107.4 °F) on 24 July 1999 (unofficial record of 42.6 °C (108.7 °F) was set on 15 June 1942).

In 2006, the city government identified six high-end economic output zones around Beijing as the primary engines for local economic growth. In 2012, the six zones produced 43.3% of the city's GDP, up from 36.5% in 2007. The six zones are:

• Zhongguancun, China's silicon village in Haidian District northwest of the city, is home to both established and start-up tech companies. In the first two quarters of 2014, 9,895 companies registered in the six zones, among which 6,150 were based in Zhongguancun. Zhongguancun is also the center of Beijing-Tianjin-Shijiazhuang Hi-Tech Industrial Belt.
• Beijing Financial Street, in Xicheng District on the west side of the city between Fuxingmen and Fuchengmen, is lined with headquarters of large state banks and insurance companies. The country's financial regulatory agencies including the central bank, bank regulator, securities regulator, and foreign exchange authority are located in the neighborhood.
• Beijing Central Business District (CBD), is actually located to the east of downtown, near the embassies along the eastern Third Ring Road between Jianguomenwai and Chaoyangmenwai. The CBD is home to most of the city's skyscraper office buildings. Most of the city's foreign companies and professional service firms are based in the CBD.
• Beijing Economic and Technological Development Area, better known as Yizhuang, is an industrial park the straddles the southern Fifth Ring Road in Daxing District. It has attracted pharmaceutical, information technology, and materials engineering companies.
• Beijing Airport Economic Zone was created in 1993 and surrounds the Beijing Capital International Airport in Shunyi District northeast of the city. In addition to logistics, airline services, and trading firms, this zone is also home to Beijing's automobile assembly plants.
• Beijing Olympic Center Zone surrounds the Olympic Green due north of downtown and is developing into an entertainment, sports, tourism and business convention center.
  

Shijingshan, on the western outskirts of the city, is a traditional heavy industrial base for steel-making. Chemical plants are concentrated in the far eastern suburbs.

Less legitimate enterprises also exist. Urban Beijing is known for being a center of infringed goods; anything from the latest designer clothing to DVDs can be found in markets all over the city, often marketed to expatriates and international visitors.