The 793M+ labor force of China paid humbly is the main factor why China became an economic might. There are a lot of inequalities as well in terms of wealth distribution.
The income gap is growing dramatically in China and the rich are getting exponentially richer — the richest 10 percent of China's population are more than three times wealthier than the official figures.
Much of that undeclared wealth is what Chinese people call "gray income," including proceeds from corruption and other ethically "gray" areas of the economy.
Living on the margins of the "gray economy" are people like migrant laborer Wang Haichuan. He rents a room far below street level in a dark, former air-raid shelter inhabited by other migrants.
Lure Of China's Gray Economy Reaches Rich And Poor : NPR
Maybe that's why some are earning okay but some are not.
But I do not know if they could sustain this economic boom,
for there are indications that they are slowing down, I hope that they could so that they could further
lessen the 100M strong poor Chinese nationals.
China's export sales contracted 15 percent in March, a shock outcome that deepens concern about sputtering Chinese economic growth.
The tumble in exports - the worst in about a year - compared with expectations for a 12 percent rise and could heighten worries about how a rising yuan CNY=CFXS has hurt demand for Chinese goods and services abroad, analysts said.
China's March exports shrink 15 percent year-on-year in shock fall | Reuters