My brother lives in Hong Kong- we talk most days. He and his friends are quite aware of how much is going on covid wise. In fact you can see as well. Last year I put the app up on here and it shows every case in every street and every apartment block. It is still live now but I cannot remember the address. It is so much more advanced than our technology. China uses technology that is way ahead of what we use also. As soon as they get an individual case in Hong Kong then that area of the city becomes a No Go Zone. And that has been going on since the very start of 2020. Lockdown there is total. Quarantine is really strict. Whatever we see about the Chinese stranglehold on Hong Kong, the people there are totally aware of what is going on especially regarding COVID. As you say a city state of 7.5million people, there is no way you can hush up a pandemic when everyone is living on top of each other.