Before it was easy for China to handle the COVID with Lockdowns, because it was spread in a small number of cities, but now it's spread through many regions. If they can get out of COVID from one city, the next one will started and in a couple of months it will come back again. At the moment my niece lives in Shanghai and some district are under Lockdown again.
Also many people suffers from lockdown, not everybody are wellfare and lives in a good apartment. We have to think about the people or family's are living in a small room less than 15 qm Meter, without a window or air conditioners for about 3 months in Hong Kong and Shanghai.
Also my niece told me stories, back at that time, that it was true that some appartments doesn't receive good support of food, not like the other one's in better districts.