I expect that soon enough they will start routinely fetching DNA from foreigners as well. Nations in which the population would object to such things can offloa

I expect that soon enough they will start routinely fetching DNA from foreigners as well. Nations in which the population would object to such things can offload some of their DNA cataloguing requirements to China and others, so people in the US and UK and so on can include the Chinese database in the search when they're matching DNA. Sure, you'll only get people who have been to China (etc.) but it's better than nothing.