Passengers sleep on train K722 which is bound for Chengdu in Southwest China from Nanjing in East China, Jan 16, 2014. Chunyun, the 40-day travel rush period around the Chinese New Year started on Jan 16. About 70 percent of passengers on the train are migrant workers. About 3.62 billion passenger trips will be made during the travel period. The figure is about 200 million more than last year, said Lian Weiliang, deputy head of the National Development and Reform Commission (NDRC). [Photo/Xinhua]