For more news and videos visit ☛ http://english.ntdtv.com<br />Follow us on Twitter ☛ http://twitter.com/NTDTelevision<br />Add us on Facebook ☛ http://on.fb.me/s5KV2C<br /><br />We've been telling you about the flood of travel that happens every year around Chinese New Year. One major cause of that congestion is the issue of migrant workers--people who live and work in cities but can't register as residents there. That means they have to leave their families behind in the countryside. And for many, it's a long trip home.<br /><br />Every year, at about this time, the world's largest human migration begins. It's a few days before the Chinese New Year, as marked by the traditional lunar calendar. This year it falls on January 23, kicking off a 15-day long celebration. It's an occasion to spend time with the family.<br /><br />[Yu Guoxin, Construction Supplies Salesman]:<br />"Going home is to reunite with the whole family. The family spends the Chinese New Year together and issues in a happy New Year. My parents are still back at home. So I must go home."<br /><br />But for many, it marks the start of an arduous journey home.<br /><br />Over the next 40 days there will be an unprecedented 3.1 billion passenger trips throughout China, according to state-run Xinhua. It's putting a strain on an already overtaxed transit system.<br /><br />At the center of the migration are millions of migrant workers. According to China's National Bureau of Statistics, over half of the population now lives in cities.<br /><br />[Zhou Xiaozheng, Sociologist at Renmin University]:<br />"Last year the urban population exceeded the rural population, but there is a problem. Before, when China was a closed society it had two social groups: urban and rural residents. But now we have several hundred million migrant workers -- a third group, who live in the city but they can't get a residence permit, so they all go home for the Chinese New Year. So our urbanization is incomplete."
