Sometimes it is difficult to see migrant workers or people at the bottom of life. What happened?

When it comes to migrant workers, the first thing people think of is the construction workers on the construction site. They are in rags and rags, and they always smell of sweat. Because migrant construction workers live in the construction site, they get up at dawn and rest at dark, and their income is low, so there is no need to put on clean and tidy clothes every day. They stand on the opposite side of the cleanliness of the city, so everyone has a resistance to migrant workers and despises them from the bottom of their hearts.