The Chinese 2nd wave, is mostly down to 'citizens' not having mobiles, to track.
They of course, have computers watching maps, with lots of green, orange and red dots, which alert the operators when any red dots move. Basically, back at the beginning of this year: Most Chinese nationals, woke up to having a new app, on their phones, with instructions, on what to do, dependent on what colour they were registered as. That is how you 'STAMP ON' a virus.
Not having a phone, to make a dot, is every humans right.
What humans need, to make this work, to make themselves safer. They on the most part, (the mob) don't want, or will not tolerate happening. There is also the issue, of those, 'above such things'. Boris for example. Could not be added to such a system, it would be a national security threat and there will be a dozen easy ways to cheat the system. That said. Practically, every mobile phone, is 'already' a dot on a map, correlating the data, can be done, in many other ways.
In reference to both quotes above: I haven't seen anything on this, from the BBC, but from SKY.
The Department of Health and Social Care has said information will be shared with police on a 'case-by-case' basis.
news.sky.com