My God you are jumping from one topic to another - like a rabbit in spring.
600 million people whose monthly income is barely 1,000 yuan (USD 140) - yes, but they all have a farm house or apartment and it's a disposable income figure
First don't forget that China is still receiving development aid - so it's always good/smart to highlight poverty.!!
Secondly - I wouldn't have a figure - but a substantial part of these people are supported by e.g. their family members working - as such their actual income is far higher then 1000 yuan a month. More or less all of my previous
unskilled workers in Shanghai or Suzhou - earning at average around 4500Rmb -
Skilled worker around 7000 Rmb, send half their money and more to their parents or family members living 2000km away in some poverty stricken or rural area.
Plus around 500-900Rmb of social security paid by the employer.
And in Shanghai a simple noodle dish costs around 45Rmb, in Suzhou around 25Rmb and in a local godforsaken farm area in Qinghai 5 Rmb
And as in almost every country in the world - it is always the "underprivileged" who have the most kids.
So what exactly are you trying to point out?