A claustrophobic 2 minutes on Beijing's metro – timelapse video

At 465km long, the Beijing metro system has already outgrown the London Underground. By 2020, an extra 400bn yuan (£40bn) of investment will see it more than double to 1,000km, according to Chinese media. The addition of 17 new lines will make it one of the world's longest networks

• Tania Branigan rides Beijing's subway end to end
• A short history of world metro systems – in pictures