Please tell me you did not just travel to a tier-1 city like Beijing or Shanghai, and extrapolated what you saw in the CBD to all of China. There is a reason that they're still desperately clinging to zero-COVID policies when the rest of the world has moved on, against seemingly all common sense.
It became against common sense when Omicron became a thing, and if you understand what the average Chinese person has to go through now to visit relatives in a neighboring city, shop for groceries, or really just to go anywhere... I hope you get the idea. It relies on totalitarian levels of AI + big data surveillance, internal passports, lockdown measures, and completely untenable long term.
If I wasn't being clear, there are 2 major reasons why China refuses to open up: ineffective domestic vaccines and few hospital beds per capita. The CCP fears a total healthcare system collapse and subsequent discontent from its citizens.
Go there and see!