Agreed
When you have a population of 1.4 billion, losing a few hundred or a thousand here or there makes very little difference. If China lost as many people as now live in North America, they would still have over one billion people.
China has roughly the same land area as the lower 48 states and probably about the same percentage is largely empty. So that means China sustains a population about four times that of America, on a similar inhabited land base.