Hundreds of millions of Chinese are now traveling home to celebrate the Lunar New Year. It's the largest human migration on earth -- and it stretches the country's transportation system to the limit.
Lunar New Year is China's biggest holiday. Work stops, factories close and millions of workers flee the cities to be with their families in a temporary, annual reversal of the urbanization that is reshaping the country.
By Charles Riley @CRrileyCNN - Last updated February 07 2013 08:30 PM ET
