Yep, they'll ring in 2022 in PB. Meanwhile, in other parts of the world where common sense prevails:
US CDC reduces isolation period for COVID-19
The article cites some scientifically based evidence on when asymptomatic people are most contagious and also cites the reduced severity and duration of Omicron in vaccinated people. The isolation China (and HKG by association) faces is not without historical precedent. You can read about it here:
China's Historical Isolation. Seems to be headed in that direction.