They've had regular city-wide/regional lockdowns all throughout. If someone in your apartment complex tests positive SURPRISE you cant leave for two weeks. Normal is gone, it's not coming back. When you move the goal post from "not overwhelming our medical system" to attempting "covid zero" this is the new normal you end up with, somewhere between China and Australia.

August 2021 https://www.theguardian.com/world/2021/aug/02/millions-under...

June 2021 https://www.scmp.com/coronavirus/greater-china/article/31380...

January 2021 https://www.nytimes.com/2021/01/13/world/asia/china-covid-lo...