The honest answer is that I don't know. Perhaps I generalised too readily before, given Taiwan is quite a bit closer to the UK in population than the other two.

Even so, assuming that strategies that appear to have been relatively successful in a smaller, more densely populated country will necessarily also work in a larger and less densely populated one seems to be dubious. We know that we don't have the resources we'd need to implement that strategy in the UK right now, and I haven't personally seen any experts arguing that it's a viable option for us, so I'm cautious about extrapolating too much here.

China doesn't have a small population and has it under control. I don't think it's a population size thing.

China does seem to be on of the most interesting cases so far.

The quarantine measures, once introduced, do seem to have been viewed favourably by the experts and do seem to have been remarkably effective. This assumes we trust the reported statistics, which I acknowledge as a possible risk in this instance.

On the other hand, it may be that China has been able to achieve that in part by pulling resources from all over to focus on the main region affected. That isn't necessarily an option that will be open to other nations, particularly if their outbreaks are distributed across their whole area almost immediately.