Beijing, is the capital of the People's Republic of China, the world's second most populous city proper, and most populous capital city. The city is located in northern China. Beijing Municipality is surrounded by Hebei Province with the exception of neighboring Tianjin Municipality to the southeast; together the three divisions form the Jingjinji metropolitan region and the national capital region of China. Beijing's Municipality has 21,700,000 inhabitants. The encompassing metropolitan area was estimated by the OECD to have, as of 2010, a population of 24.9 million.
As a city combining both modern and traditional architecture, Beijing is a megacity rich in history, exemplified in its global influence in politics, economy, education, history, culture, and technology. Beijing is the second largest Chinese city by urban population after Shanghai and is the nation's political, cultural, and educational center.
The city has a post-industrial economy that is dominated by a services sector, which generated 76.9% of output, followed by manufacturing and construction sectors 22.2%.
It is home to the headquarters of most of China's largest state-owned companies and is 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.