Well that’s what people who live there say - so I have no idea were you get your numbers - from the CCP perhaps?
What people? The people making $400 a year anywhere aren’t in a position to share their situation with you.
In fact the only figure I could fit your $400 regarding China is an official poverty line per member of household. It is not wage.
A family of 5 in rural area with an unemployed mother and a father on minimal wage of $175 a month fits into the category, except much less than half of the Chinese live like that, more like under 5%.
Governemnt benefits aren’t included in calculation by the way.
I think a larger portion of the US population don’t make $400 per family member a year.