Beijing is the capital of the most populous country in the world, China, and its second largest city after Shanghai. It was the seat of the Ming and Qing dynasty emperors until the formation of a republic in 1911.
Chaoyang District is in Beijing. Chaoyang is a massive district, roughly covering the urban area to the north and east of central Beijing, beginning at the Second Ring Road, and stretching beyond the Fifth Ring Road.
Haidian is a large district in the north-west of Beijing. Haidian has been a major beneficiary of the recent subway expansions: lines 4, 10, and 13 make it easier to reach Haidian's busier areas by public transport.