"At the end of 2009, registered senior citizens in Beijing numbered 2.27 million, or 18.2 percent of the city's total population of permanent residents, the report said, citing the local government. The city will have a moderately aged society when its aged population reaches 3.24 million in 2015 ... In the coming five years, approximately 470,000 senior citizens in Beijing will require nursing." (Quoted from article)