With China's economy booming, factories are springing up all over the country, and, in one of the largest migrations in human history, poor, young villagers are streaming into the makeshift cities that emerge around the factories. Earlier this afternoon, NPR interviewed author Leslie Chang about her new book, Factory Girls: From Village to City in a Changing China, which explores the corruption and opportunity young women encounter when they move to these cities. Though Chang says she does not sugarcoat the extremely tough conditions, many of the girls actually find upward mobility and freedom when they leave their homes. Being the sole breadwinner changes their status within their families, and many girls decide they want to learn to drive, buy apartments with friends, and stay in the city. [NPR]