Migrant workers who helped build modern China have scant or no pensions, and can’t retire

At 53, Guan Junling is too old to get hired at factories anymore. Toiling in sweatshops and building apartment complexes they could never afford to live in, they played a vital role in China's transformation into an economic powerhouse. As they grow older, the first generation of migrant workers is struggling to find jobs in a slowing economy.