The World Bank poverty line, globally, is an income of $1.90 per day. By 2015, only 0.7% of the Chinese population were at or below the poverty level, with about 9.9 million in this category out of a population of 1.35 billion.
China's own national poverty line is higher, and even by that metric, only 3.1% of the population — 30.5 million people — lives in poverty.
Meanwhile, in the US, 12.3% of the population falls below the national poverty line, which in the 48 contiguous states is $12,490 a year for an individual or $25,750 a year for a family of four, according to the Department of Health and Human Services. That's 39.7 million Americans living in poverty.