Naxi man harvests some crops in Lijiang

A Naxi Chinese ethnic minority man carries a bushel of corn back to his village in Lijiang, northern Yunnan Province, on September 30, 2012. More than 100 million Chinese farmers will move to cities by 2020, posing huge challenges and risks for urban planners and already stretched social welfare systems, according to a new government report. UPI/Stephen Shaver