The scale of the effort is mind-boggling. For a straight population-based comparison, China (~1.4B) building a database of every American (~300M), is like the

The scale of the effort is mind-boggling. For a straight population-based comparison, China (~1.4B) building a database of every American (~300M), is like the USA building a database of everyone in the UK or France (~64M). I also imagine there will be a lot of badly correlated records, leading to Brazil-like Tuttle/Buttle errors.