
The authorities trapped thousands of people in a controlled compound.
China has the dreaded Social Credit/Ranking Score on every citizen.
China has facial recognition and ID Cards on every citizen.
They will now scrutinize everyone there one by one, and the people with any issues with the government will suddenly and inexplicably contract COVID to be carried away for "treatment". This is what Canada, Australia, and America were trying to implement before the COVID curtain fell and stopped the pageant spectacular.