They have about 900 million people living on $7 or less per day. Half a billion people there are living on $3-$4 or less per day. Of the poorest two billion people on earth, more than 1/3 are in China. Their income numbers for the bottom 50% compare with the poorest nations on earth.

Granted, the problem with China is it possesses the most inequality of any major nation between the top 50% and the bottom 50%, due to the vast rural vs east coast gap in incomes. The nation with the second most billionaires, that has half a billion people living as subsistence farmers.