This is a hugely loaded statement, but that aside, China is not open to immigrants, that was the original thesis and that hasn't been disproven yet.

That's fine, since nobody attempted to disprove that in the first place.

The idea that they're at a disadvantage to Ireland in that aspect because the latter has more numbers-wise was what was addressed.

They might very well not be open. Or they might be open in a selective and cautious way, which would be more prudent than merely being open for all.