@alyx They had no huge reason to lie about their population last year.
And in six months, (if some of them remain), they will forget they have a reason to lie either.
Don't get me wrong. I am sure they are lying now, but people do lie only about things that do matter to them ATM.
@LukeAlmighty
Do we have real numbers of China population? And do we know for sure they'll be honest about their numbers next time they get a census?
Simply in theory, but the same uncertainty is there in practice.