Hole in Hong Kong's population figures revealed
Government admits it cannot say how many foreigners and mainlanders live in the city, leading to calls for overhaul of data collection

Pressure over Hong Kong's population policies increased yesterday after the government admitted it had no idea how many foreigners and mainlanders lived in the city.
Critics said the lack of figures was another indication of the government's inability to get to grips with the issue.
They said a total overhaul of the system for collecting data was needed if the city was to address the problems of its ageing population and declining birth rate.
The Post inquired about the number of non-locals living in the city after Singapore - seen as the city's main rival in Asia - set out a road map for its population polices on Tuesday based on a huge rise in immigration.
None of the Hong Kong government departments handling immigration and statistics - the Security Bureau, the Immigration Department and the Census and Statistics Department - was able to provide a reliable figure.
Neither did they know how many foreigners had left after obtaining permanent residency.