In Beijing, even the tiniest apartment can cost a fortune — after all, with more than 21 million residents, space is limited and demand is high.
But it is possible to find more affordable housing. You'll just have to join an estimated 1 million of the city's residents and look underground.
Below the city's bustling streets, bomb shelters and storage basements are turned into illegal — but affordable — apartments.
Claustrophobic Living Quarters