It depends, JiK.
Official exchange rates (UK and France; China)
4.27 Trillion : 2.22 Trillion
Purchasing parity power
3.6 billion : 8.88 trillion
$ figures from 2005, via CIA world factbook
Anybody else think the Chinese official exchange rate is slightly rigged?
BTW, California GDP 2005 = 1.62 trillion $ (wikipedia)