China is not that it used to be. ‘Slave laborers’ in industry makes 6-9 thousand dollars annually. In terms of purchase power parity it is 30,000+ in US. There are still millions of peasants living for a dollar a day, but there are huge number upper middle class people making 100,000+. Probably more than in US.
Maybe it depends on what you call rich.
In 2007, there were a reported 391,000 million-dollar-plus households in China, and 0.8% of households had $100K+ in assets (though of course that includes their retirement, as they don’t have our form of safety net):
http://www.china-mike.com/facts-about-china/facts-rich-poor-inequality
But it sure is growing fast.