Wei Yangkun, 2.5 years old, is carried by his mother as they leave Beijing Railway Station for their hometown Xinyang of Henan province, in Beijing, China, January 25, 2016. According to traffic police, over 2.9 billion trips will be made around China during the 40-day Spring Festival travel rush, which started on January 24. (Photo by Jason Lee/Reuters)





Ma Jiaqi, 5, and her mother arrive at Beijing Railway Station for their train to Changchun of Jilin province, in Beijing, China, January 25, 2016. (Photo by Jason Lee/Reuters)





A four-year-old girl holds the bag as she and her parents wait for their train to hometown in Shanxi province, at Beijing Railway station, in Beijing, China, January 25, 2016. (Photo by Jason Lee/Reuters)





Ning Juyuan, 2.5 years old, and his parents arrive at Beijing Railway Station for their train to their hometown hometown Dalian of Liaoning province, in Beijing, China, January 25, 2016. (Photo by Jason Lee/Reuters)





Jiang Rui (L), 4, his cousin Jiang Zixian, 5, and their grandparents wait for their train to hometown Anqing of Anhui province, at Beijing Railway station, in Beijing, China, January 25, 2016. (Photo by Jason Lee/Reuters)





Xiao Yaoyao, 6, siting on the bag reacts as he and his parents wait for their train to hometown Changde of Hunan province, at Beijing Railway station, in Beijing, China, January 25, 2016. (Photo by Jason Lee/Reuters)





A one-year-old girl and her mother wait for their train next to paramilitary policemen at Beijing Railway Station, in Beijing, China, January 25, 2016. (Photo by Jason Lee/Reuters)





A mother carries her one-year-old daughter next to her husband (R) as the family arrive at Beijing Railway Station by train for Spring Festival, in Beijing, China, January 25, 2016. (Photo by Jason Lee/Reuters)





A mother pushes a bag carrying her 2.5-year-old son next to her husband (R) as the family arrive at Beijing Railway Station by train for Spring Festival, in Beijing, China, January 25, 2016. (Photo by Jason Lee/Reuters)





Pan Siqi, 22 months old, is carried by her mother as they wait for the train to their hometown Dandong of Liaoning province at Beijing Railway Station, in Beijing, China, January 25, 2016. (Photo by Jason Lee/Reuters)





2.5-year-old Wei Yangkun is carried by his mother as they leave Beijing Railway Station for their hometown Xinyang of Henan province, in Beijing, China, January 25, 2016. (Photo by Jason Lee/Reuters)





A six-year-old girl walks with her mother and grandfather as they arrive at Beijing Railway Station for Spring Festival, China, January 25, 2016. (Photo by Jason Lee/Reuters)





Two-year-old Xuanxuan stands among passengers as she and her parents wait for their train to their hometown Nantong of Jiangsu province at Beijing Railway station, in Beijing, China, January 25, 2016. (Photo by Jason Lee/Reuters)