People who go out to work every day. Nouns that appear together with natural selection of migrant workers, natural selection of cooks, taking care of a "sheep", natural selection of migrant workers, natural selection of people who take care of lambs, natural selection of caring people and so on. "Natural selection of migrant workers" is an online buzzword, which refers to those who have negative nucleic acid test results and need to go out to work when the epidemic situation is serious. During the epidemic, "the community is not sealed+the unit is not sealed+the health treasure is not popped up", and people who can go to work on time every day.