China is just the victim of its own media, as usual. You can't trumpet that the coronavirus fight is largely over and the Party has successfully contained it without expecting the population to become complacent. Friends there tell me the mood there is now greatly relaxed, and masks are becoming available again as fewer people are buying them in bulk. Especially in places that saw comparatively few infections / deaths like Shanghai, there was not much psychological scarring and therefore an easy return to "business as usual" mentality.