A long exposure photo made available on 13 January 2017 shows passengers flowing to their train at Hankou Railway Station in Wuhan, Hubei Province, central China, late 12 January 2017, immediately before the first day of the 40-day Spring Festival Travel Peak. China expects to carry some three billion trips during the 40 days. (Photo by EPA/Stringer)





Passengers enter the Beijing Railway Station in central Beijing, China January 13, 2017 as the annual Spring Festival travel rush begins ahead of the Chinese Lunar New Year. (Photo by Damir Sagolj/Reuters)





A boy checks his seat on a passenger train he boarded at the Beijing Railway Station in central Beijing, China January 13, 2017 as the annual Spring Festival travel rush begins ahead of the Chinese Lunar New Year. (Photo by Damir Sagolj/Reuters)





Security personnel arrives to the Beijing Railway Station in central Beijing, China January 13, 2017 as the annual Spring Festival travel rush begins ahead of the Chinese Lunar New Year. (Photo by Damir Sagolj/Reuters)





A passenger rushes past a railway worker at the Beijing Railway Station in central Beijing, China January 13, 2017 as the annual Spring Festival travel rush begins ahead of the Chinese Lunar New Year. (Photo by Damir Sagolj/Reuters)





Passengers rest in front of a banner urging for fire protection during the Spring Festival at the departure hall of the Beijing Railway Station in central Beijing, China January 13, 2017 as the annual festival travel rush begins ahead of the Chinese Lunar New Year. (Photo by Damir Sagolj/Reuters)





A man takes picture as passengers arrive to the Beijing Railway Station in central Beijing, China January 13, 2017 as the annual Spring Festival travel rush begins ahead of the Chinese Lunar New Year. (Photo by Damir Sagolj/Reuters)





A passenger takes picture of herself at the Beijing Railway Station in central Beijing, China January 13, 2017 as the annual Spring Festival travel rush begins ahead of the Chinese Lunar New Year. (Photo by Damir Sagolj/Reuters)





Passengers arrive to the Beijing Railway Station in central Beijing, China January 13, 2017 as the annual Spring Festival travel rush begins ahead of the Chinese Lunar New Year. (Photo by Damir Sagolj/Reuters)





People take pictures of themselves as passengers arrive to the Beijing Railway Station in central Beijing, China January 13, 2017 as the annual Spring Festival travel rush begins ahead of the Chinese Lunar New Year. (Photo by Damir Sagolj/Reuters)





Passengers enter the Beijing Railway Station in central Beijing, China January 13, 2017 as the annual Spring Festival travel rush begins ahead of the Chinese Lunar New Year. (Photo by Damir Sagolj/Reuters)





A boy tries to lift a suitcase at the departure hall of the Beijing Railway Station in central Beijing, China January 13, 2017 as the annual Spring Festival travel rush begins ahead of the Chinese Lunar New Year. (Photo by Damir Sagolj/Reuters)





High-speed railway trains are parked at a maintenance station, on the first day of the annual Spring Festival travel rush ahead of the Lunar New Year, in Wuhan, Hubei province, China, January 13, 2017. (Photo by Reuters/Stringer)





A passenger rests during the annual Spring Festival travel rush ahead of the Chinese Lunar New Year inside a railway station in Shanghai, China January 15, 2017. (Photo by Reuters/Stringer)





Passengers wait to enter a railway station during the annual Spring Festival travel rush ahead of the Chinese Lunar New Year in Guangzhou, Guangdong province, China January 14, 2017. (Photo by Reuters/Stringer)





Passengers wait for a train to depart from the Hankou Railway Station in Wuhan, central China's Hubei province, Friday January 13, 2017. Officials expect that Chinese travelers will make almost 3 billion trips during the holiday travel rush that starts runs through Feb. 21. These trips include intercity flights, trains and local bus rides to villages for China's 1.4 billion people. (Photo by Chinatopix via AP Photo)