100 Million Restless Chinese Go Far From Home for Jobs
China is on move, with estimated 10 percent of population migrating, mostly in search of better jobs; rural migrants, with strong emotional ties to villages and unable to get urban residence permits needed for entirely legal life in cities, mostly seek to earn money to take home; most of migrants, now thought to number 100 million, return to hometowns every Chinese New Year, in what may be largest seasonal migration in world; their presence is transforming urban life, mixing together China's distinct regional cultures and giving rise to new rootless urban underclass; map; photos (M)
