Taiwan has 20 million people, an island fortress and is a world-leading example of COVID containment policies. China could not have achieved the result they claim to, as the per capita numbers are laughable and they are also not an island fortress.

China contains about 1/8th of the worlds population and massive land borders, the policy response cannot have been as well coordinated as Taiwan's; there has to have been at least one province somewhere that screwed up badly. There will have been large unreported outbreaks.