FWIW my office works closely with an office in Nanjing. They've all been back in the office for ages (and we can see the conference room on the video call). If they were having outbreaks like the rest of the world, there would be bodies piling up like mad. They tried to hide the bodies back in Jan / Feb 2020 and failed, so I don't think they're hiding bodies now. Which means there aren't any bodies; which means their lockdown must have actually been effective at containing the virus.

The rest of us could have done what Taiwan did, and almost entirely avoided becoming infected. Or we could have done what China did -- clamp down hard for three weeks and then go back to normal.