On: China Unveils Plan to Tie Hong Kong, Macau Closer ...

[lazerpants]

To be fair, NY state is large and sparsely populated. The NY Metro area is much smaller and more dense but includes parts of several states.

The NY Metropolitan Statistical Area is 20.3 million residents in 17,405 km2, according to Wikipedia.

[bagacrap → lazerpants]

So the PRD is basically three NY metro areas.