If you’re unfamiliar with the urban migrant phenomenon in China — as in, the people who make the stuff you buy and their lives — then China’s Urban Immigrants: A Diet of Bitterness is a fine overview with lots of links for further reading.
“Chinese metropolises are now home to an estimated 200 million rural-to-urban migrants . . . who occupy a precarious place in the urban hierarchy: while urbanites appreciate their labor, they are less enthusiastic about the migrants’ presence in their cities.”
For more on this topic you can browse our Migrant Workers category, or if you like documentaries, see these reviews of two good documentaries on migrant workers: